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Journal articles on the topic 'LE. Scanners'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

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1

Rotar, Raul Nicolae, Anca Jivanescu, Codruta Ille, et al. "Trueness and Precision of Two Intraoral Scanners: A Comparative In Vitro Study." Scanning 2019 (October 21, 2019): 1–6. http://dx.doi.org/10.1155/2019/1289570.

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The aim of this study was to evaluate the accuracy of two intraoral scanners used in the dental office. A molar fixed in a typodont was prepared for a ceramic onlay. The preparation was scanned using a high-resolution scanner (reference scanner) and saved as stereolithography (STL) format. The prepared resin molar was scanned again using the intraoral scanners, and all the scans were saved as well in STL format. All STL files were compared using metrology software (Geomagic Control X). Overlapping the meshes allowed the assessment of the scans in terms of trueness and precision. Based on the r

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Carvalho, William S., Viviane de S. M. Almeida, Leonardo Provedel, Anderson da S. Maciel, and Viviane A. Sarmento. "Volumetric Evaluation of 3D Models Generated by Different Surface Treatment Protocols." European Journal of Dental and Oral Health 3, no. 5 (2022): 5–8. http://dx.doi.org/10.24018/ejdent.2022.3.5.229.

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The objective of this study was to compare the volume of three-dimensional (3D) models generated by different scanners and computational modeling protocols. Eight dry mandibles were scanned by five different computed tomography (CT) scanners and by a 3D-scanner. Three-dimensional models were generated, received different surface treatment processes, and the final volume of the 3D models was compared. The results show that there was no significant difference among the volume of the 3D models generated by the different CT scanners and surface treatment techniques, however, the model volume gener

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Rabah, Chaima Ben, Gouenou Coatrieux, and Riadh Abdelfattah. "Boosting up Source Scanner Identification Using Wavelets and Convolutional Neural Networks." Traitement du Signal 37, no. 6 (2020): 881–88. http://dx.doi.org/10.18280/ts.370601.

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In this paper, we present a conceptually innovative method for source scanner identification (SSI), that is to say, identifying the scanner at the origin of a scanned document. Solutions from literature can distinguish between scanners of different brands and models but fail to differentiate between scanners of the same models. To overcome this issue, the approach we propose takes advantage of a convolutional neural network (CNN) to automatically extract intrinsic scanner features from the distribution of the coefficients of the diagonal high-frequency (HH) sub-band of the discrete stationary

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Baier, Valentin, Michael Schardt, Maximilian Fink, Martin Jakobi, and Alexander W. Koch. "MEMS-Scanner Testbench for High Field of View LiDAR Applications." Sensors 22, no. 1 (2021): 39. http://dx.doi.org/10.3390/s22010039.

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LiDAR sensors are a key technology for enabling safe autonomous cars. For highway applications, such systems must have a long range, and the covered field of view (FoV) of >45° must be scanned with resolutions higher than 0.1°. These specifications can be met by modern MEMS scanners, which are chosen for their robustness and scalability. For the automotive market, these sensors, and especially the scanners within, must be tested to the highest standards. We propose a novel measurement setup for characterizing and validating these kinds of scanners based on a position-sensitive detector (PSD

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Cai, HongXin, Bing Cheng Zhao, Yueyi Tian, et al. "Design of a Single-Tooth Model and Its Application in Oral Scan System Assessment." Scanning 2021 (March 21, 2021): 1–8. http://dx.doi.org/10.1155/2021/8891396.

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Intraoral scanners have been widely used in the application of dentistry. Accuracy includes trueness and precision; they have an important position in the assessment of intraoral scanners. The existing standard models are divided into the inlay and the crown, but the operation is relatively complicated. In this study, in order to simplify the current standard model, we designed a new integration model to compare the accuracy of two intraoral scanners (CEREC and TRIOS) and an extraoral scanner (SHINING). The coordinate measuring machine measured value is the gold standard. Values of the length

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Bohner, Lauren, Daniel Habor, Klaus Radermacher, Stefan Wolfart, and Juliana Marotti. "Scanning of a Dental Implant with a High-Frequency Ultrasound Scanner: A Pilot Study." Applied Sciences 11, no. 12 (2021): 5494. http://dx.doi.org/10.3390/app11125494.

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The purpose of this in vitro study was to assess the trueness of a dental implant scanned using an intraoral high-frequency ultrasound prototype and compared with conventional optical scanners. An acrylic resin cast containing a dental implant at position 11 was scanned with a fringe projection 3D sensor for use as a reference dataset. The same cast was scanned 10 times for each group. Ultrasound scanning was performed with a high-frequency probe (42 MHz, aperture diameter of 4 mm and focus length of 8 mm), and 3D images were reconstructed based on the depth of each surface point echo. Optical

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Xue, Song, Rui Guo, Karl Peter Bohn, et al. "A cross-scanner and cross-tracer deep learning method for the recovery of standard-dose imaging quality from low-dose PET." European Journal of Nuclear Medicine and Molecular Imaging 49, no. 6 (2021): 1843–56. http://dx.doi.org/10.1007/s00259-021-05644-1.

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Abstract Purpose A critical bottleneck for the credibility of artificial intelligence (AI) is replicating the results in the diversity of clinical practice. We aimed to develop an AI that can be independently applied to recover high-quality imaging from low-dose scans on different scanners and tracers. Methods Brain [18F]FDG PET imaging of 237 patients scanned with one scanner was used for the development of AI technology. The developed algorithm was then tested on [18F]FDG PET images of 45 patients scanned with three different scanners, [18F]FET PET images of 18 patients scanned with two diff

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Burde, Alexandru Victor, Marius Manole, Radu-Septimiu Campian, Cosmin Sinescu, and Sorana Baciu. "In vitro Comparison of Accuracy of Two Scanners Used in Dental Medicine." Revista de Chimie 70, no. 7 (2019): 2344–46. http://dx.doi.org/10.37358/rc.19.7.7336.

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This experimental study aims to highlight and compare the resolution and accuracy (trueness and fidelity) of an intraoral scanner and a laboratory scanner. In order to achieve the aim of this study, an experimental model consisting of a die with a standard preparation for a porcelain-fused to metal crown was manufactured from a physiognomic polymethylmethacrylate resin. The experimental model was scanned with an industrial CT to obtain the virtual reference model. Then, the die was scanned 15 times with each scanner. In order to asses trueness, comparisons were made with the virtual reference

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International, Journal of Medical Science and Innovative Research (IJMSIR). "A Comparative Study to Evaluate The Accuracy of Open Tray Splinted and Non-Splinted Implant Level Impressions and Impressions Obtained From Two Intraoral Scanners For Three Implants Placed in A Partially Edentulous Arch - An in Vitro Study." International Journal of Medical Science and Innovative Research (IJMSIR) 9, no. 4 (2024): 185–97. https://doi.org/10.5281/zenodo.15422901.

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<strong>Abstract</strong> Title: A comparative study to evaluate the accuracy of open tray splinted and non-splinted implant level impressions and impressions obtained from two intraoral scanners for three implants placed in a partially edentulous arch - an in vitro study <strong>Objective</strong>: The aim of this in vitro study was to compare and evaluate the accuracy of open tray splinted and non-splinted Implant level impression and impressions obtained from two intraoral scanners for three implants placed in a partially edentulous arch and to evaluate which of the two scanners used (Trios

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Nestle, U., S. Kremp, D. Hellwig, et al. "Multi-centre calibration of an adaptive thresholding method for PET-based delineation of tumour volumes in radiotherapy planning of lung cancer." Nuklearmedizin 51, no. 03 (2012): 101–10. http://dx.doi.org/10.3413/nukmed-0452-11-12.

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SummaryPurpose: To evaluate the calibration of an adaptive thresholding algorithm (contrastoriented algorithm) for FDG PET-based delineation of tumour volumes in eleven centres with respect to scanner types and image data processing by phantom measurements. Methods: A cylindrical phantom with spheres of different diameters was filled with FDG realizing different signal-to-background ratios and scanned using 5 Siemens Biograph PET/CT scanners, 5 Philips Gemini PET/CT scanners, and one Siemens ECAT-ART PET scanner. All scans were analysed by the contrast-oriented algorithm implemented in two dif

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Al-Dulaijan, Yousif A., Haidar Alalawi, Mohammed M. Gad, Faisal D. Al-Qarni, Shaimaa M. Fouda, and Passent Ellakany. "Trueness and precision of complete denture digital impression compared to conventional impression: an in vitro study." PeerJ 13 (February 26, 2025): e19075. https://doi.org/10.7717/peerj.19075.

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Background This study aimed to compare the precision and trueness of digital impressions of the edentulous arch made with different scanners to conventional physical impressions. Methods A total of 40 impressions of a completely edentulous maxillary arch model (n = 10) were made using different digital impressions with an extraoral scanner, E3 3Shape desktop scanner, as the reference scan, intraoral scanner (TRIOS IOS, and Medit IOS) and Vinyl Polysiloxane impressions (VPS) impression using a Computer-Aided Design and Computer-Aided Manufacturing (CAD-CAM) custom tray. The VPS impression was s

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Jafri, Syed Riaz un Nabi, Sheraz Shamim, Sadia Muniza Faraz, Asif Ahmed, Syed Muhammad Yasir, and Jamshed Iqbal. "Characterization and calibration of multiple 2D laser scanners." PLOS ONE 17, no. 7 (2022): e0272063. http://dx.doi.org/10.1371/journal.pone.0272063.

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This paper presents the comparative evaluation of multiple compact and lightweight 2D laser scanners for their possible backpack based scanning and mapping applications. These scanners include Hokuyo URG-04LX, Slamtec RPLidar A1-M8 and Hokuyo UTM-30LX-EW scanners. Since the technical datasheets provide general information and limited working details, this research presents a thorough study on the performance of each scanner related explicitly to indoor mapping operations. A series of scanning experiments have been performed for the characterization of each scanner using statistical analysis. D

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Lee, Dong-Geun, Keunbada Son, and Kyu-Bok Lee. "Comparison of the Accuracy of Intraoral Scanners Based on the Type of Tooth Preparation for a Single Crown." Applied Sciences 11, no. 20 (2021): 9399. http://dx.doi.org/10.3390/app11209399.

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The purpose of this study was to evaluate the accuracy of intraoral scanners in 10 abutments (five premolars and five molars) obtained in a dental clinic and to analyze the impacts of the volume and area of abutments on scanning accuracy. Abutment casts were scanned five times with a 3D contact scanner (DS10; Renishaw plc). The five scan files were lined up and then merged, and one high-resolution computer-aided design reference model (CRM) was obtained. To obtain a computer-aided design test model (CTM), three types of intraoral scanners (CS3600 (Carestream Dental), i500 (Medit), and EZIS PO

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Choi, Kyu Sung, Whal Lee, Joon Hyung Jung, and Eun-Ah Park. "Reproducibility of calcium scoring of the coronary arteries: comparison between different vendors and iterative reconstructions." Acta Radiologica Open 9, no. 4 (2020): 205846012092214. http://dx.doi.org/10.1177/2058460120922147.

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Background The coronary artery calcium scoring (CCS) has been widely used for cardiac risk stratification for asymptomatic patients. Purpose To assess the reproducibility of CCS performed on four different computed tomography (CT) scanners, and compare the variability between two reconstruction algorithms, filtered back projection (FBP), and iterative reconstruction (IR). Material and Methods A CCS phantom was made from agar and contained 23 pieces of chicken bones. The phantom was repeatedly scanned using four different CT scanners: Toshiba; GE; Philips; and Siemens. Images were reconstructed

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Sampaio-Fernandes, Manuel António, Ricardo Pinto, Paulo Rocha Almeida, Maria Margarida Sampaio-Fernandes, Duarte Marques, and Maria Helena Figueiral. "Accuracy of Extraoral Digital Impressions with Multi-Unit Implants." Applied Sciences 13, no. 15 (2023): 8769. http://dx.doi.org/10.3390/app13158769.

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The aim of this in vitro study was to evaluate the accuracy of impressions made using two different silicones and corresponding stone casts in full-arch implant rehabilitation, using two laboratory scanners. A master model with six dental implants was created, scanned with a 12-megapixel scanner and used as digital master model. Ten implant impressions were obtained via two silicone impressions systems—Coltene® and Zhermack®—using the open-tray technique and poured gypsum. Two extraoral scanning systems (S600 ARTI Zirkonzhan® and Identica T500 Medit®) were used to scan the impressions and ston

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Lee, Sang J., Soo-Woo Kim, Joshua J. Lee, and Chan W. Cheong. "Comparison of Intraoral and Extraoral Digital Scanners: Evaluation of Surface Topography and Precision." Dentistry Journal 8, no. 2 (2020): 52. http://dx.doi.org/10.3390/dj8020052.

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The aim of this study was to evaluate the surface topography and the precision measurements of different intraoral and extraoral digital scanners. A reference model of a maxillary arch with four implant analogs was prepared and scanned by three intraoral and two extraoral scanners. The reference model was scanned fifteen times with each digital scanning system, investigating the surface topography and precision measurements for the same-arch and cross-arch measurements. The data was exported to 3D inspection and mesh-processing software (GOM Inspect, Braunschweig, Germany). Statistical analysi

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Song, Jihu, and Minji Kim. "Accuracy on Scanned Images of Full Arch Models with Orthodontic Brackets by Various Intraoral Scanners in the Presence of Artificial Saliva." BioMed Research International 2020 (February 27, 2020): 1–8. http://dx.doi.org/10.1155/2020/2920804.

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Aim. This study aims to evaluate the accuracy of scanned images of 4 clinically used intraoral scanners (CS3600, i500, Trios3, Omnicam) when scanning the surface of full arch models with various kinds of orthodontic brackets in the presence of artificial saliva. Materials and Methods. Four study models were prepared; bonded with ceramic, metal, and resin brackets, respectively, and without brackets. Reference images were taken by scanning the models with an industrial scanner. Study models were then applied with an artificial saliva and scanned 10 times, respectively, with the above 4 intraora

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Alharbi, Abdulaziz M., Saleh A. Alawaji, Mohammed Riad Yehya, and Ali A. Alenezi. "Evaluation of the accuracy of different digital scanning systems and intraoral scanning strategies: An in vitro study." Saudi Journal of Oral Sciences 11, no. 2 (2024): 125–32. http://dx.doi.org/10.4103/sjoralsci.sjoralsci_40_24.

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Abstract Introduction: Differentiating between the various available digital impression systems in terms of accuracy could help in determining the most appropriate system to be used. Aim: The purpose of this in vitro study was to evaluate the accuracy of four different intraoral scanners, along with different intraoral scanning strategies (IOSs), and using the conventional impression method. Materials and Methods: A model with prepared teeth was scanned with a laboratory scanner. Following that, the model was scanned using the following four intraoral scanners (IOSs): TRIOS, CEREC AC Omnicam,

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Lee, Kyungmin Clara, and Seong-Joon Park. "Digital Intraoral Scanners and Alginate Impressions in Reproducing Full Dental Arches: A Comparative 3D Assessment." Applied Sciences 10, no. 21 (2020): 7637. http://dx.doi.org/10.3390/app10217637.

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The purpose of this in vivo study was to compare in vivo full arch intraoral scans obtained using two intraoral scanners and conventional impression. Twenty patients were scanned using TRIOS and iTero scanners, as well as conventional impression. Dental models obtained from alginate impression were scanned with a laboratory desktop scanner. Individual intraoral scan data were compared with corresponding model scans using three-dimensional (3D) surface analysis. The average surface deviations were calculated for quantitative evaluation, and these values were compared between two intraoral scann

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Bucuresteanu, Anca, Dan Prodan, and Adrian Motomancea. "Execution of Plastic Parts Using 3D Scanners and 3D Printers." Materiale Plastice 55, no. 2 (2018): 215–18. http://dx.doi.org/10.37358/mp.18.2.4998.

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In this paper, the authors show a part of research works performed on the use of 3D scanners and 3D printers to execute plastic parts with complex surfaces. 3D scanning allows copying of certain surfaces in our environment, based on existing models. Scanned models may represent various objects, made of a wide range of materials: metals, ceramics, fabrics, plastics, leather, organic materials etc. [1]. This paper shows the results achieved using a scanner and a common and affordable - low-price - printer. 3D scanners and printers allow execution of clones of certain parts with irregular surface

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Spagopoulos, Dimitrios, George Kaisarlis, Foteini Spagopoulou, Demetrios J. Halazonetis, Jan-Frederik Güth, and Efstratios Papazoglou. "In Vitro Trueness and Precision of Intraoral Scanners in a Four-Implant Complete-Arch Model." Dentistry Journal 11, no. 1 (2023): 27. http://dx.doi.org/10.3390/dj11010027.

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(1) Background: New intraoral (IOS) and laboratory scanners appear in the market and their trueness and precision have not been compared. (2) Methods: Seven IOS and two laboratory scanners were used to scan a mandibular edentulous model with four parallel internal hexagon implant analogues and PEEK scan bodies. Digital models in Standard Tessellation Language (STL) were created. The master model with the scan bodies was scanned (×10) with a computerized numerical control 3D Coordinate Measuring Machine (CMM). The short (distances of adjacent scan posts) and long distances (distances of the sca

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Favero, Riccardo, Andrea Volpato, Maurizio De Francesco, Adolfo Di Fiore, Riccardo Guazzo, and Lorenzo Favero. "Accuracy of 3D digital modeling of dental arches." Dental Press Journal of Orthodontics 24, no. 1 (2019): 038e1–037e7. http://dx.doi.org/10.1590/2177-6709.24.1.38.e1-7.onl.

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ABSTRACT Objective: The aim of the study was to verify and compare the accuracy of full-arch digital impressions obtained using two intraoral scanners and three scanning methodologies. Methods: A resin model created with dental 3-D printing was scanned by a reference scanner (Zfx Evolution - Zimmer Biomet, Palm Beach Gardens, FL) in order to obtain a 3D reference; the same resin model was then scanned with two different intraoral scanners (Zfx IntraScan and Carestream 3600 - CS 3600®, Carestream, Rochester, NY, USA) using: Technique A (from tooth #27 up to tooth #17); Technique B (from tooth #

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Majstorović, Nemanja, Luka Čerče, Davorin Kramar, et al. "Examination of Scanner Precision by Analysing Orthodontic Parameters." Balkan Journal of Dental Medicine 21, no. 1 (2017): 32–43. http://dx.doi.org/10.1515/bjdm-2017-0005.

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Summary Background: 3D modelling in orthodontics is becoming an increasingly widespread technique in practice. One of the significant questions already being asked is related to determining the precision of the scanner used for generating surfaces on a 3D model of the jaw. Materials and methods: This research was conducted by generating a set of identical 3D models on Atos optical 3D scanner and Lazak Scan laboratory scanner, which precision was established by measuring a set of orthodontic parameters (54 overall) in all three orthodontic planes. In this manner we explored their precision in s

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Ciocan, Lucian Toma, Vlad Gabriel Vasilescu, Sabina-Ana Răuță, Mihaela Pantea, Silviu-Mirel Pițuru, and Marina Imre. "Comparative Analysis of Four Different Intraoral Scanners: An In Vitro Study." Diagnostics 14, no. 13 (2024): 1453. http://dx.doi.org/10.3390/diagnostics14131453.

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(1) Background: Intraoral scanners undergo rapid advancements in hardware and software, prompting frequent updates by manufacturers. (2) Aim: This study aimed to quantitatively assess the precision of full dental arch digital impressions obtained from four different intraoral scanners: Trios 5—3SHAPE, Copenhagen, Denmark, CEREC Primescan— Dentsply Sirona, New York, NY, USA, Planmeca Emerald S—Planmeca Oy, Helsinki, Finland, and Medit i700—Medit Corp, Seoul, Republic of Korea. (3) Methods: A maxillary virtual dental model (digital master model) was created in accordance with ISO standard 20896-

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Taguchi, Narumi, Seitaro Oda, Takeshi Nakaura, et al. "Contrast enhancement in abdominal computed tomography: influence of photon energy of different scanners." British Journal of Radiology 91, no. 1081 (2018): 20170285. http://dx.doi.org/10.1259/bjr.20170285.

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Objective: Different CT scanners have different X-ray spectra and photon energies indicating that contrast enhancement vary among scanners. However, this issue has not been fully validated; therefore, we performed phantom and clinical studies to assess this difference. Methods: Two scanners were used: scanner-A and scanner-B. In the phantom study, we compared the contrast enhancement between the scanners at tube voltage peaks of 80, 100 and 120 kVp. Then, we calculated the effective energies of the two CT scanners. In the clinical study, 40 patients underwent abdominal scanning with scanner-A

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Vyskub, V. G. "POSSIBILITIES AND LIMITATIONS OF COMBINED SCANNERS." Issues of radio electronics, no. 5 (May 20, 2018): 74–82. http://dx.doi.org/10.21778/2218-5453-2018-5-74-82.

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The technique of optical scanning is continuously developing in the direction of creating new and improving existing types of scanners (deflectors), radiation sources, methods of reading, converting and reproducing information. However, the absence of universal scanner, able to satisfy different applications leads to necessity of application of combined scanning, finding the most effective combination of deflectors with complementary characteristics taking into account their limit values. The purpose of this work is an overview of a typical combined of the scanners used in the systems of wide

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Bhatia, Niharika, and Srirengalakshmi Muthuswamy Pandian. "Evaluation of the accuracy of full-arch impressions between three different intraoral scanners and conventional impressions: A prospective in vivo study." Journal of Dental Research, Dental Clinics, Dental Prospects 18, no. 1 (2024): 77–84. http://dx.doi.org/10.34172/joddd.40841.

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<strong data-sider-select-id="bc467b4a-f3fa-459c-ac3f-000e49c9414d">Background. This in-vivo study evaluated the accuracy of full-arch digital impressions obtained through different intraoral scanning technologies regarding trueness and efficiency against the standard alginate impressions. <strong data-sider-select-id="482190c3-539f-48aa-8b34-c83f0a64de34">Methods. Alginate impressions were taken from 50 subjects, and the resulting stone casts were scanned using the Trios 3Shape desktop scanner. In-vivo scans were conducted on each participant using three intraoral scanners: Medit,

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Yang, Xinyi, Michael Silosky, Jonathan Wehrend, et al. "Improving Generalizability of PET DL Algorithms: List-Mode Reconstructions Improve DOTATATE PET Hepatic Lesion Detection Performance." Bioengineering 11, no. 3 (2024): 226. http://dx.doi.org/10.3390/bioengineering11030226.

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Deep learning (DL) algorithms used for DOTATATE PET lesion detection typically require large, well-annotated training datasets. These are difficult to obtain due to low incidence of gastroenteropancreatic neuroendocrine tumors (GEP-NETs) and the high cost of manual annotation. Furthermore, networks trained and tested with data acquired from site specific PET/CT instrumentation, acquisition and processing protocols have reduced performance when tested with offsite data. This lack of generalizability requires even larger, more diverse training datasets. The objective of this study is to investig

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Brambilla, M., R. Matheoud, C. Basile, et al. "An Adaptive Thresholding Method for BTV Estimation Incorporating PET Reconstruction Parameters: A Multicenter Study of the Robustness and the Reliability." Computational and Mathematical Methods in Medicine 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/571473.

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Objective. The aim of this work was to assess robustness and reliability of an adaptive thresholding algorithm for the biological target volume estimation incorporating reconstruction parameters.Method. In a multicenter study, a phantom with spheres of different diameters (6.5–57.4 mm) was filled with18F-FDG at different target-to-background ratios (TBR: 2.5–70) and scanned for different acquisition periods (2–5 min). Image reconstruction algorithms were used varying number of iterations and postreconstruction transaxial smoothing. Optimal thresholds (TS) for volume estimation were determined

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Lee, Joo-Hee, Soo-Hwan Byun, Sang-Min Yi, In-Young Park, Byoung-Eun Yang, and Hye-Lim Lee. "Efficacy of Constructing Digital Hybrid Skull-Dentition Images Using an Intraoral Scanner and Cone-Beam Computed Tomography." Scanning 2022 (March 3, 2022): 1–9. http://dx.doi.org/10.1155/2022/8221514.

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Cone-beam computed tomography (CBCT) can distort dentition, and additional imaging is often required. A plaster model to help digitize dental images has been widely used in clinical practice, but there are some inconveniences such as complexity of the process and the risk of damage. The aim of this study was to evaluate the potential for improving dentition imaging with CBCT scans using an intraoral scanner instead of a plaster model. The study used laser model-scanned images of plaster models, imaging from two intraoral scanners, and CBCT images from 20 patients aged 12-18 years. CS 3600 (Car

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Burde, Alexandru Victor, Cristina Gasparik, Marioara Moldovan, Sorana Baciu, and Cosmin Cosma. "In vitro Evaluation of Accuracy of Single Dies Captured by Two Intraoral Digital Scanners." Materiale Plastice 55, no. 2 (2018): 176–78. http://dx.doi.org/10.37358/mp.18.2.4988.

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The objective of this in-vitro study was to compare the accuracy, defined as trueness and precision, of two intraoral digital scanners that use different capturing techniques. An experimental reference object consisting of a die was manufactured from a PMMA resin. The reference object was digitized with an industrial CT and was scanned 15 times with each scanner. In order to asses trueness, comparisons were made with the virtual reference model, and for fidelity, the first scan in the series was compared with the following scans. For both fidelity and trueness, the F test and T tests demonstra

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Cho, Ran-Yeong, Soo-Hwan Byun, Sang-Min Yi, et al. "Comparative Analysis of Three Facial Scanners for Creating Digital Twins by Focusing on the Difference in Scanning Method." Bioengineering 10, no. 5 (2023): 545. http://dx.doi.org/10.3390/bioengineering10050545.

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Background: Multi-dimensional facial imaging is increasingly used in hospital clinics. A digital twin of the face can be created by reconstructing three-dimensional (3D) facial images using facial scanners. Therefore, the reliability, strengths, and weaknesses of scanners should be investigated and approved; Methods: Images obtained from three facial scanners (RayFace, MegaGen, and Artec Eva) were compared with cone-beam computed tomography images as the standard. Surface discrepancies were measured and analyzed at 14 specific reference points; Results: All scanners used in this study achieved

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Yanakiev, Spartak, and Mariana Dimova-Gabrovska. "Dimensional Accuracy Assessment of 3D-Printed Edentulous Jaw Models: A Comparative Analysis Using Three Laboratory Scanners." Materials 18, no. 14 (2025): 3323. https://doi.org/10.3390/ma18143323.

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The dimensional accuracy of 3D-printed edentulous jaw models is critical for successful prosthetic treatment outcomes. This study investigated the accuracy of 3D-printed working models of a completely edentulous jaw through comparative analysis of digital images generated by three laboratory scanners. A reference plaster model of a mandibular edentulous arch was digitized and used to produce ten resin models via digital light processing (DLP) technology. Each model was scanned using three different laboratory scanners: AutoScan-DS-EX, AutoScan-DS-EX Pro(H), and Optical 3D Scanner Vinyl. Digita

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Lee, Joohee, ByoungEun Yang, and Hyelim Lee. "Intraoral Scan for Virtual Skull-Dentition Hybrid Images of Young Patients." JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY 49, no. 1 (2022): 57–64. http://dx.doi.org/10.5933/jkapd.2022.49.1.57.

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Additional dentition images are needed because the dentitions are distorted in cone-beam computed tomography (CBCT) due to streak artifacts and non-uniformity of the x-ray beam. The purpose of this study is to evaluate the feasibility of improving the dentition image of CBCT scan with intraoral scanner instead of plaster models. Maxilla images from plaster models, two intraoral scanners, and CBCT of 20 patients aged 12 to 18 were used in this study. With one of the intraoral scanners, the full arch was scanned by three segments and combined into a complete full arch. Virtual skull-dentition hy

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Velas, Martin, Michal Spanel, Tomas Sleziak, Jiri Habrovec, and Adam Herout. "Indoor and Outdoor Backpack Mapping with Calibrated Pair of Velodyne LiDARs." Sensors 19, no. 18 (2019): 3944. http://dx.doi.org/10.3390/s19183944.

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This paper presents a human-carried mapping backpack based on a pair of Velodyne LiDAR scanners. Our system is a universal solution for both large scale outdoor and smaller indoor environments. It benefits from a combination of two LiDAR scanners, which makes the odometry estimation more precise. The scanners are mounted under different angles, thus a larger space around the backpack is scanned. By fusion with GNSS/INS sub-system, the mapping of featureless environments and the georeferencing of resulting point cloud is possible. By deploying SoA methods for registration and the loop closure o

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Farook, Taseef Hasan, Saif Ahmed, Jamal Giri, Farah Rashid, Toby Hughes, and James Dudley. "Influence of Intraoral Scanners, Operators, and Data Processing on Dimensional Accuracy of Dental Casts for Unsupervised Clinical Machine Learning: An In Vitro Comparative Study." International Journal of Dentistry 2023 (November 22, 2023): 1–10. http://dx.doi.org/10.1155/2023/7542813.

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Purpose. This study assessed the impact of intraoral scanner type, operator, and data augmentation on the dimensional accuracy of in vitro dental cast digital scans. It also evaluated the validation accuracy of an unsupervised machine-learning model trained with these scans. Methods. Twenty-two dental casts were scanned using two handheld intraoral scanners and one laboratory scanner, resulting in 110 3D cast scans across five independent groups. The scans underwent uniform augmentation and were validated using Hausdorff’s distance (HD) and root mean squared error (RMSE), with the laboratory s

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Borodina, Irina D., Leon S. Grigoryants, Magammed A. Gadzhiev, et al. "Comparative evaluation of the accuracy of the dental arch display using modern intraoral three-dimensional scanners." Russian Journal of Dentistry 26, no. 4 (2022): 287–97. http://dx.doi.org/10.17816/1728-2802-2022-26-4-287-297.

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BACKGROUND: At present, modern dentists used dental intraoral three-dimensional (3D) scanners routinely in their daily work. Obtaining an optical 3D image of the teeth and dentition helps avoid errors at the stage of obtaining traditional silicone impressions and significantly reduces the level of discomfort during dental procedures. Intraoral scanner systems are commercially available today. Despite their advantages over traditional silicone impressions, the accuracy of the optical impressions obtained during total and subtotal prosthetics on the upper and lower jaw are still questionable.&#x

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Son, Keunbada, and Kyu-bok Lee. "Effect of Tooth Types on the Accuracy of Dental 3D Scanners: An In Vitro Study." Materials 13, no. 7 (2020): 1744. http://dx.doi.org/10.3390/ma13071744.

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The purpose of this study was to evaluate the accuracy of dental three-dimensional (3D) scanners according to the types of teeth. A computer-aided design (CAD) reference model (CRM) was obtained by scanning the reference typodont model using a high-precision industrial scanner (Solutionix C500, MEDIT). In addition, a CAD test model (CTM) was obtained using seven types of dental 3D scanners (desktop scanners (E1 and DOF Freedom HD) and intraoral scanners (CS3500, CS3600, Trios2, Trios3, and i500)). The 3D inspection software (Geomagic control X, 3DSystems) was used to segment the CRM according

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Velu, Juliëtte F., Erik Groot Jebbink, Jean-Paul PM de Vries, Job AM van der Palen, Cornelis H. Slump, and Robert H. Geelkerken. "A phantom study for the comparison of different brands of computed tomography scanners and software packages for endovascular aneurysm repair sizing and planning." Vascular 26, no. 2 (2017): 198–202. http://dx.doi.org/10.1177/1708538117726648.

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Objectives Correct sizing of endoprostheses used for the treatment of abdominal aortic aneurysms is important to prevent endoleaks and migration. Sizing requires several steps and each step introduces a possible sizing error. The goal of this study was to investigate the magnitude of these errors compared to the golden standard: a vessel phantom. This study focuses on the errors in sizing with three different brands of computed tomography angiography scanners in combination with three reconstruction software packages. Methods Three phantoms with a different diameter, altitude and azimuth were

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Mezei, Adrián, and Tibor Kovács. "Curvature Adaptive 3D Scanning Transformation Calculation." Periodica Polytechnica Electrical Engineering and Computer Science 62, no. 4 (2018): 107–16. http://dx.doi.org/10.3311/ppee.11540.

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Three-dimensional objects can be scanned by 3D laser scanners that use active triangulation. These scanners create three-dimensional point clouds from the scanned objects. The laser line is identified in the images, which are captured at given transformations by the camera, and the point cloud can be calculated from these. The hardest challenge is to construct these transformations so that most of the surface can be captured. The result of a scanning may have missing parts because either not the best transformations were used or because some parts of the object cannot be scanned. Based on the

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Ruzgienė, Birutė, Renata Bagdžiūnaitė, and Vilma Ruginytė. "SCANNING AERIAL PHOTOS USING A NON-PROFESSIONAL SCANNER." Geodesy and Cartography 38, no. 3 (2012): 118–21. http://dx.doi.org/10.3846/20296991.2012.728901.

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For scanning analog aerial photographs, digital photogrammetry requires specific and expensive photogrammetric scanners. However, we only have a simple A4 format scanner useful for solving some special photogrammetric tasks applied for analyzing the possibilities of scanning photographic material. The paper investigates the peculiarities of scanning analog aerial photos using the scanner processing pictures smaller than an A4 format. The achieved results are compared with digital data obtained using a professional photogrammetric scanner. Experimental photogrammetric measurements have showed t

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Ghadirifard, Mohammad, Mitra Eisaei, Sayed Mohammadreza Hakimaneh, Mohammad Amin Bafandeh, and Sayed Shojaodin Shayegh. "In Vitro Evaluation of the Effect of Scanning Strategy on the Accuracy of Intraoral Scanners." Galen Medical Journal 13, SP1 (2024): e3748. https://doi.org/10.31661/gmj.v13isp1.3748.

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Background: The accuracy of intraoral scanners depends on the scanning strategy, but evidence on how these strategies affect trueness and precision across scanners is limited. Identifying optimal strategies is key to improving performance and clinical outcomes. Materials and Methods: A dental cast obtained from an impression of a fully-dentate patient was initially scanned by a laboratory scanner and then by three intraoral scanners namely Trios®4, Carestream 3800, and Medit i700 with three different scanning strategies of A (occlusal surfaces from the left end to the right end, followed by li

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Ros, A., L. Barrientos, M. Borja-Lloret, et al. "New probe for the improvement of the Spatial Resolution in total-body PET (PROScRiPT)." EPJ Web of Conferences 253 (2021): 09004. http://dx.doi.org/10.1051/epjconf/202125309004.

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In recent decades, PET scanners have been widely used for diagnosis and treatment monitoring in nuclear medicine. The continuous effort of the scientific community has led to improvements in scanner performance. Total-body PET is one of the latest upgrades in PET scanners. These kinds of scanners are able to scan the whole body of the patient with a single bed position, since the scanner tube is long enough for the patient to fit inside. While these scanners show unprecedented efficiency and extended field-of-view, a drawback is their low spatial resolution compared to dedicated scanners. In o

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Maeng, Jiyoun, Young-Jun Lim, Bongju Kim, Myung-Joo Kim, and Ho-Beom Kwon. "A New Approach to Accuracy Evaluation of Single-Tooth Abutment Using Two-Dimensional Analysis in Two Intraoral Scanners." International Journal of Environmental Research and Public Health 16, no. 6 (2019): 1021. http://dx.doi.org/10.3390/ijerph16061021.

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The aim of this study was to two-dimensionally evaluate deviation errors at five digital cross-sections of single-tooth abutment in regards to data obtained from two intraoral scanners, and to evaluate accuracy of individual scanners. Two intraoral scanners, the Trios 3® (3 Shape, Copenhagen, Denmark) and EzScan® (Vatech, Hwaseong, Korea), were evaluated by utilizing 13 stone models. The superimposed 3D data files were sectioned into five different planes: buccal-lingual section (BL), mesial-distal section (MD), transverse high section (TH), transverse middle section (TM), and transverse low s

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Gharineiat, Zahra, Fayez Tarsha Kurdi, Krish Henny, Hamish Gray, Aaron Jamieson, and Nicholas Reeves. "Assessment of NavVis VLX and BLK2GO SLAM Scanner Accuracy for Outdoor and Indoor Surveying Tasks." Remote Sensing 16, no. 17 (2024): 3256. http://dx.doi.org/10.3390/rs16173256.

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The Simultaneous Localization and Mapping (SLAM) scanner is an easy and portable Light Detection and Ranging (LiDAR) data acquisition device. Its main output is a 3D point cloud covering the scanned scene. Regarding the importance of accuracy in the survey domain, this paper aims to assess the accuracy of two SLAM scanners: the NavVis VLX and the BLK2GO scanner. This assessment is conducted for both outdoor and indoor environments. In this context, two types of reference data were used: the total station (TS) and the static scanner Z+F Imager 5016. To carry out the assessment, four comparisons

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Amornvit, Pokpong, Dinesh Rokaya, and Sasiwimol Sanohkan. "Comparison of Accuracy of Current Ten Intraoral Scanners." BioMed Research International 2021 (September 13, 2021): 1–10. http://dx.doi.org/10.1155/2021/2673040.

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There have been various developments in intraoral 3D scanning technology. This study is aimed at investigating the accuracy of 10 scanners developed from 2015 to 2020. A maxillary dental model with reference points was printed from Form 2 (FormLabs, Somerville, MA, USA). The model was scanned 5 times with each intraoral scanner (IOS); Trios 3 (normal and high-resolution mode); Trios 4 (normal and high-resolution mode) (3Shape Trios A/S, Copenhagen, Denmark); iTero Element, iTero 2, and iTero 5D Element (Align Technologies, San Jose, California, USA); Dental Wings (Dental Wings, Montreal QC, Ca

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Murashov, Mikhail, Svetlana Stepanova, Maria Platonova, Sofia Grindenko, and Sofia Derezina. "COMPARISON OF CONVENTIONAL AND DIGITAL TECHNOLOGIES FOR MAKING THE EAR EPITHESIS." Actual problems in dentistry 19, no. 3 (2023): 114–18. http://dx.doi.org/10.18481/2077-7566-2023-19-3-114-118.

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Subject. Digital and conventional technologies for the making of ear epitheses. Objectives. To compare different methods of making ear epithesis according to the following criteria: timing, accuracy, ergonomics. Methodology. The study was carried out in Department of Propaedeutics and Prosthetics Technologies in Dentistry of DF, at the Moscow State University of Medial Dentistry named after A.I. Evdokimov. The students – volunteers' auricles were scanned with three different smartphone apps, two intraoral scanners and a facial scanner.  Results. The 3D image obtained using a

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Barca, Patrizio, Fabio Paolicchi, Giacomo Aringhieri, et al. "A comprehensive assessment of physical image quality of five different scanners for head CT imaging as clinically used at a single hospital centre—A phantom study." PLOS ONE 16, no. 1 (2021): e0245374. http://dx.doi.org/10.1371/journal.pone.0245374.

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Nowadays, given the technological advance in CT imaging and increasing heterogeneity in characteristics of CT scanners, a number of CT scanners with different manufacturers/technologies are often installed in a hospital centre and used by various departments. In this phantom study, a comprehensive assessment of image quality of 5 scanners (from 3 manufacturers and with different models) for head CT imaging, as clinically used at a single hospital centre, was hence carried out. Helical and/or sequential acquisitions of the Catphan-504 phantom were performed, using the scanning protocols (CTDIvo

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Gomes, Grazielle Franco, Mónica Estefanía Tinajero Aroni, Lucas Portela Oliveira, João Neudenir Arioli Filho, Carolina Mollo Binda, and Francisco de Assis Mollo Júnior. "Implant digital impression accuracy using extraoral scanners." Brazilian Journal of Oral Sciences 22 (July 10, 2023): e238354. http://dx.doi.org/10.20396/bjos.v22i00.8668354.

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Aim: To analyze the accuracy of extraoral systems (Ceramill Map400+, AutoScan-DS200+, and E2) in full implantprosthetic rehabilitation three-dimensionally. Methods: A metallic edentulous maxilla with four implants was digitalized by a contact scanner (MDX-40 - Roland, control) and used as a control image to compare with other images generated by three laboratory scanners (10 samples per group). Letters identified all the four components: A and D angled 45º, and B and C parallel. The BioCAD software exported the images (.STL) to compare and verify deviations of the analogs on the X, Y, and Z ax

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Aksjonovs, Artēmijs, Edgars Zaicevs, and Andris Martinovs. "3D SCANNERS. DIVERSITY AND OPERATING PRINCIPLES." HUMAN. ENVIRONMENT. TECHNOLOGIES. Proceedings of the Students International Scientific and Practical Conference, no. 21 (April 19, 2017): 13–18. http://dx.doi.org/10.17770/het2017.21.3576.

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The paper deals with existing 3D scanners classification and types. Each 3D scanner given the principle of operation. It examines the scope of application of different type scanners advantages and disadvantages. The aim was based on this data to create a 3D scanner prototype, by means of which an ordinary user can conveniently and easily scan a small, straightforward form objects.

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