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Готові списки джерел за темами / Simulating Visual Prosthet / Статті в журналах

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Статті в журналах з теми "Simulating Visual Prosthet"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

Pavloski, Raymond. "Progress in Developing an Emulation of a Neuromorphic Device That Is Predicted to Enhance Existing Cortical Prosthetic Vision Technology by Engaging Desired Visual Geometries." Prosthesis 4, no. 4 (2022): 600–623. http://dx.doi.org/10.3390/prosthesis4040049.

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The utility of currently available cortical prosthetic vision systems is disappointing. The essential features of a neuromorphic device that is predicted to enhance vision provided by available systems follow from a hypothesis which states that the objective and subjective aspects of cortical prosthetic vision jointly constitute patterns that emerge from specified synaptic interactions. The research reported here completes several required steps in developing an emulation of this device: (1) replication of small-scale simulations that are consistent with the hypothesis using the NEST (Écublens

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2

Chen, Spencer C., Gregg J. Suaning, John W. Morley, and Nigel H. Lovell. "Simulating prosthetic vision: I. Visual models of phosphenes." Vision Research 49, no. 12 (2009): 1493–506. http://dx.doi.org/10.1016/j.visres.2009.02.003.

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3

Puech, Philippe, Adil Ouzzane, Vianney Gaillard, et al. "Multiparametric MRI-Targeted TRUS Prostate Biopsies Using Visual Registration." BioMed Research International 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/819360.

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Prebiopsy multiparametric prostate MRI (mp-MRI), followed by transrectal ultrasound-guided (TRUS-G) target biopsies (TB) of the prostate is a key combination for the diagnosis of clinically significant prostate cancers (CSPCa), to avoid prostate cancer (PCa) overtreatment. Several techniques are available for guiding TB to the suspicious mp-MRI targets, but the simplest, cheapest, and easiest to learn is “cognitive,” with visual registration of MRI and TRUS data. This review details the successive steps of the method (target detection, mp-MRI reporting, intermodality fusion, TRUS guidance to t

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4

Scarlatis, G. N., R. J. Greenberg, and J. W. Judy. "Performance of basic visual tasks using retinal-prosthetic simulation." Journal of Vision 6, no. 6 (2010): 357. http://dx.doi.org/10.1167/6.6.357.

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5

Kara, Tolgay, and Ahmad Soliman Masri. "Modeling and Analysis of a Visual Feedback System to Support Efficient Object Grasping of an EMG-Controlled Prosthetic Hand." Current Directions in Biomedical Engineering 5, no. 1 (2019): 207–10. http://dx.doi.org/10.1515/cdbme-2019-0053.

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AbstractMillions of people around the world have lost their upper limbs mainly due to accidents and wars. Recently in the Middle East, the demand for prosthetic limbs has increased dramatically due to ongoing wars in the region. Commercially available prosthetic limbs are expensive while the most economical method available for controlling prosthetic limbs is the Electromyography (EMG). Researchers on EMG-controlled prosthetic limbs are facing several challenges, which include efficiency problems in terms of functionality especially in prosthetic hands. A major issue that needs to be solved is

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6

Lin, Xiangli. "Neurophysiology Based on Deep Neural Network under Artificial Prosthesis Vision." Journal of Physics: Conference Series 2074, no. 1 (2021): 012083. http://dx.doi.org/10.1088/1742-6596/2074/1/012083.

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Abstract With the vigorous development of electronic technology and computer technology, as well as the continuous advancement of research in the fields of neurophysiology, bionics and medicine, the artificial visual prosthesis has brought hope to the blind to restore their vision. Artificial optical prosthesis research has confirmed that prosthetic vision can restore part of the visual function of patients with non-congenital blindness, but the mechanism of early prosthetic image processing still needs to be clarified through neurophysiological research. The purpose of this article is to stud

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7

Wang, Jing, Rongfeng Zhao, Peitong Li, et al. "Clinical Progress and Optimization of Information Processing in Artificial Visual Prostheses." Sensors 22, no. 17 (2022): 6544. http://dx.doi.org/10.3390/s22176544.

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Visual prostheses, used to assist in restoring functional vision to the visually impaired, convert captured external images into corresponding electrical stimulation patterns that are stimulated by implanted microelectrodes to induce phosphenes and eventually visual perception. Detecting and providing useful visual information to the prosthesis wearer under limited artificial vision has been an important concern in the field of visual prosthesis. Along with the development of prosthetic device design and stimulus encoding methods, researchers have explored the possibility of the application of

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8

van Rheede, J. J., C. Kennard, and S. L. Hicks. "Simulating prosthetic vision: Optimizing the information content of a limited visual display." Journal of Vision 10, no. 14 (2010): 32. http://dx.doi.org/10.1167/10.14.32.

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9

Villarreal, Diego Luján, and Wolfgang Krautschneider. "Spatially Localized Visual Perception Estimation by Means of Prosthetic Vision Simulation." Journal of Imaging 10, no. 11 (2024): 294. http://dx.doi.org/10.3390/jimaging10110294.

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Retinal prosthetic devices aim to repair some vision in visually impaired patients by electrically stimulating neural cells in the visual system. Although there have been several notable advancements in the creation of electrically stimulated small dot-like perceptions, a deeper comprehension of the physical properties of phosphenes is still necessary. This study analyzes the influence of two independent electrode array topologies to achieve single-localized stimulation while the retina is electrically stimulated: a two-dimensional (2D) hexagon-shaped array reported in clinical studies and a p

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10

Chen, S. C., L. E. Hallum, N. H. Lovell, and G. J. Suaning. "Visual acuity measurement of prosthetic vision: a virtual-reality simulation study." Journal of Neural Engineering 2, no. 1 (2005): S135—S145. http://dx.doi.org/10.1088/1741-2560/2/1/015.

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11

Lyu, Qing, Zhuofan Lu, Heng Li, et al. "A Three-Dimensional Microelectrode Array to Generate Virtual Electrodes for Epiretinal Prosthesis Based on a Modeling Study." International Journal of Neural Systems 30, no. 03 (2020): 2050006. http://dx.doi.org/10.1142/s0129065720500069.

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Despite many advances in the development of retinal prostheses, clinical reports show that current retinal prosthesis subjects can only perceive prosthetic vision with poor visual acuity. A possible approach for improving visual acuity is to produce virtual electrodes (VEs) through electric field modulation. Generating controllable and localized VEs is a crucial factor in effectively improving the perceptive resolution of the retinal prostheses. In this paper, we aimed to design a microelectrode array (MEA) that can produce converged and controllable VEs by current steering stimulation strateg

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12

Fan, Jin, Jing Wang, Qiushi Ren, et al. "Estimating the Position of Simulated Phosphenes Using a Tactile Guide." Seeing and Perceiving 24, no. 2 (2011): 125–40. http://dx.doi.org/10.1163/187847511x570088.

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AbstractA visual prosthesis provides usable visual information to the patient in the form of phosphenes, that is, punctate photic sensations seen after electrical stimulation. Stimulation via different electrodes results in phosphenes in different positions within the visual field. Simulation studies can provide data on the possible limitations of prosthetic stimulation. We used a head mounted screen to monocularly present constant or flickering light spots of different sizes, or luminance to normally sighted subjects. Subjects were asked to judge the location of the spots using a polar coordi

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13

Chen, S. C., L. E. Hallum, G. J. Suaning, and N. H. Lovell. "A quantitative analysis of head movement behaviour during visual acuity assessment under prosthetic vision simulation." Journal of Neural Engineering 4, no. 1 (2007): S108—S123. http://dx.doi.org/10.1088/1741-2560/4/1/s13.

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14

Bastos, Bucioli Arthur Augusto, JUNIOR EDGARD LAMOUNIER, de Lima Gerson Flavio Mendes, Alexandre Cardoso, Vieira Botelho Roberto, and Cesar Santos Paulo. "Uma ferramenta baseada em Realidade Misturada para simulação e treinamento de cirurgias TAVI." Revista Ibérica de Sistemas e Tecnologias de Informação 1, e67 (2024): 248–60. https://doi.org/10.5281/zenodo.11475522.

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Cardiovascular diseases remain the leading global cause of mortality,accounting for 18 million deaths in 2019 (WHO). Approaches such as TranscatheterAortic Valve Implantation (TAVI) surgeries have emerged as minimally invasivesolutions to restore compromised cardiac function. However, these techniquesconfront intrinsic challenges, which could potentially be mitigated by interactivetechnologies such as Mixed Reality, blending the tangible environment with virtualsupportive elements. This study introduces a platform simulating TAVI procedureswithin the context of Mixed Reality, incorporating rea

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15

Thorn, Jacob Thomas, Enrico Migliorini, and Diego Ghezzi. "Virtual reality simulation of epiretinal stimulation highlights the relevance of the visual angle in prosthetic vision." Journal of Neural Engineering 17, no. 5 (2020): 056019. http://dx.doi.org/10.1088/1741-2552/abb5bc.

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16

Erak, Marko, Biljana Bugarcic, Dragica Erak, Dragan Arandjelovic, Ilinka Nadj, and Dusanka Tesanovic. "Conformal radiotherapy of prostate carcinoma: Procedure description." Medical review 64, no. 1-2 (2011): 51–54. http://dx.doi.org/10.2298/mpns1102051e.

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Introduction. Today, three-dimensional conformal radiotherapy is a standard way in the radical treatment of localized prostate cancer, and it is an alternative to the radical prostatectomy. This method of radiotherapy treatment is widely accepted in the treatment of prostate cancer patients, and provides irradiation of targeted volume (prostate, seminal vesicles) with dose escalation sparing the surrounding healthy tissues (rectum, bladder) at the same time. That is not possible with the conventional twodimension technique. Procedure description. Three-dimensional conformal radiotherapy is a v

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17

Avraham, David, and Yitzhak Yitzhaky. "Effects of Depth-Based Object Isolation in Simulated Retinal Prosthetic Vision." Symmetry 13, no. 10 (2021): 1763. http://dx.doi.org/10.3390/sym13101763.

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Visual retinal prostheses aim to restore vision for blind individuals who suffer from outer retinal degenerative diseases such as retinitis pigmentosa and age-related macular degeneration. Perception through retinal prostheses is very limited, but it can be improved by applying object isolation. We used an object isolation algorithm based on integral imaging to isolate objects of interest according to their depth from the camera and applied image processing manipulation to the isolated-object images. Subsequently, we applied a spatial prosthetic vision simulation that converted the isolated-ob

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18

Akano, Theddeus Tochukwu. "Numerical Study of Prosthetic Knee Replacement Using Finite Element Analysis." Journal of Biomimetics, Biomaterials and Biomedical Engineering 44 (February 2020): 9–26. http://dx.doi.org/10.4028/www.scientific.net/jbbbe.44.9.

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The knee at times undergoes a surgical process to substitute the weight-bearing surfaces of the knee joint. This procedure relieves the pain and disability around the knee joint. This research paper studied the knee arthroplasty, also referred to as knee replacement. This work was aided with computer vision for visual and accuracy. Autodesk fusion 360 and the stl files were used to generate cemented, posterior stabilised knee prosthesis and imported into the COMSOL Multiphysics software. Then, the three-dimensional models of the total knee arthroplasty (TKA) prosthetic structure are produced.

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19

Mimram, Léo, Sophie Magréault, Younes Kerroumi, et al. "Population Pharmacokinetics of Orally Administered Clindamycin to Treat Prosthetic Joint Infections: A Prospective Study." Antibiotics 11, no. 11 (2022): 1462. http://dx.doi.org/10.3390/antibiotics11111462.

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A population PK model of clindamycin orally administered to patients with prosthetic joint infections (PJIs) was developed using NONMEM 7.5. Monte-Carlo simulations were run to determine the probability of obtaining bone clindamycin concentrations equal to at least the MIC or four times the MIC for several MIC values and dosing regimens. One hundred and forty plasma concentrations prospectively obtained from 20 patients with PJIs were used. A one-compartment model with first-order absorption and elimination appropriately described the data. Mean PK-parameter estimates (F being the bioavailabil

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20

Triono, Agus, Mahros Darsin, Arsi Fathurrahman, Santoso Mulyadi, and Nasrul Ilminnafik. "Optimization of the structure of bionic finger segment prosthesis using generative design." F1000Research 11 (June 6, 2022): 613. http://dx.doi.org/10.12688/f1000research.109230.1.

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Background: Bionic hand prosthesis helps restore the original hand function. A survey on prosthetic users concluded that 79% thought that their devices were "too heavy". Therefore, the weight of the prosthesis is a major cause of user discomfort and fatigue. This research was aimed at the reduction of hand mass bionic prosthesis by optimizing the structure of the fingers with generative design methods. Methods: The materials used were Acrylonitrile butadiene styrene plastic and Nylon 6, and the manufacturing method used Additive Manufacturing. The prosthesis was designed with a lighter finger

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21

Yamate, Satoshi, Satoshi Hamai, Toshiki Konishi, et al. "Adjustment of stem anteversion using tapered cone stem in total hip arthroplasty." Bone & Joint Open 5, no. 10 (2024): 858–67. http://dx.doi.org/10.1302/2633-1462.510.bjo-2024-0144.r1.

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AimsThe aim of this study was to evaluate the suitability of the tapered cone stem in total hip arthroplasty (THA) in patients with excessive femoral anteversion and after femoral osteotomy.MethodsWe included patients who underwent THA using Wagner Cone due to proximal femur anatomical abnormalities between August 2014 and January 2019 at a single institution. We investigated implant survival time using the endpoint of dislocation and revision, and compared the prevalence of prosthetic impingements between the Wagner Cone, a tapered cone stem, and the Taperloc, a tapered wedge stem, through si

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22

Popa, Dragos Laurentiu, Alina Duță, Dragos Tutunea, George Gherghina, Gabriel Buciu, and Daniel Cosmin Calin. "Virtual Methods Applied to Human Bones and Joints Re-Construction Used for Orthopedic Systems." Applied Mechanics and Materials 822 (January 2016): 160–65. http://dx.doi.org/10.4028/www.scientific.net/amm.822.160.

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In the first stage of research, real bone components were analyzed to determine the main visual geometric shapes. After that, it was used a CT or MRI device to get parallel sections of studied bone components. In the third stage, the images were transferred to a 2D CAD software like AutoCAD, where the outer and inner contours of the bone were approximated by polygonal lines composed of multiple segments. To obtain virtual bones was used a parametric CAD software that allows defining models with a high degree of difficulty. The contours were transferred to a 3D CAD software, which, step by step

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23

Koçak, Mertcan, and Erkin Gezgin. "Unified Design Methodology for a Polycentric Transfemoral Knee Prosthesis Using Kinematic Synthesis." Machines 13, no. 1 (2024): 20. https://doi.org/10.3390/machines13010020.

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This study introduces a novel single-degree-of-freedom polycentric knee mechanism specifically designed for transfemoral prostheses to address dual challenges of stability during the stance phase and biomimetic motion during the swing phase. Leveraging analytical kinematic synthesis, the proposed mechanism integrates separate kinematic designs for each of the gait phases into a combined structure that prevents singularity issues during full knee flexion, which is a significant limitation in conventional active designs. The stance phase mechanism emphasizes stability through precise control of

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24

Lockhart, Catherine M., Travis B. Smith, Paul Yang, et al. "Longitudinal characterisation of function and structure of Bietti crystalline dystrophy: report on a novel homozygous mutation in CYP4V2." British Journal of Ophthalmology 102, no. 2 (2017): 187–94. http://dx.doi.org/10.1136/bjophthalmol-2016-309696.

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BackgroundBietti crystalline dystrophy (BCD) is a rare inherited disorder characterised by fine crystalline deposits in the corneal limbus and retinal posterior pole. In 2004, mutations in the CYP4V2 gene were identified as the cause of BCD. Here, we describe the report of a homozygous point mutation in a patient with BCD and provide detailed characterisation of functional and structural changes over 20 years.MethodsAt regular intervals, the patient underwent repeat ophthalmic evaluations. DNA was extracted from buccal swabs, amplified by standard PCR and analysed for homology to the CYP4V2 se

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25

Zhang, Xiaoyan, Manyun Bo, Rong Zeng, Liping Zou, and Yanfang He. "Analgesic Effects of Dexmedetomidine Combined with Spinal and Epidural Anesthesia Nursing on Prostate Hyperplasia Patients after Transurethral Resection of Prostate by Intelligent Algorithm-Based Magnetic Resonance Imaging." Computational and Mathematical Methods in Medicine 2022 (May 21, 2022): 1–11. http://dx.doi.org/10.1155/2022/4243244.

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To analyze the investigation of the application effects of different doses of dexmedetomidine (Dex) with combined spinal and epidural anesthesia nursing on analgesia after transurethral resection of prostate (TURP) by intelligent algorithm-based magnetic resonance imaging (MRI), MRI imaging segmentation model of mask regions with convolutional neural network (Mask R-CNN) features was proposed in the research. Besides, the segmentation effects of Mask R-CNN, U-net, and V-net algorithms were compared and analyzed. Meanwhile, a total of 184 patients receiving TURP were selected as the research ob

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26

Jin, William, Benjamin Rich, Crystal Selesteen Seldon, et al. "HIDRATE-PRO: A prospective pilot study evaluating a digital behavioral health intervention to improve bladder-filling compliance in patients with prostate cancer receiving radiation." Journal of Clinical Oncology 41, no. 6_suppl (2023): 70. http://dx.doi.org/10.1200/jco.2023.41.6_suppl.70.

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70 Background: Prostate cancer (PCa) patients undergoing radiation therapy (RT) need comfortably full bladders during RT to reduce toxicities. Awareness of this state is lacking, and poor compliance is common with standard of care written/verbal instructions, leading to wasted patient value (PV) and inefficient throughput (TE). Herein, we assessed the feasibility and acceptability of a digital behavioral intervention (DBI) to improve bladder filling compliance, methods for quantifying PV, IT, and behavioral biomarkers. Methods: We enrolled 18 non-metastatic PCa patients in a prospective, singl

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27

Berberi, Antoine, Dagher Maroun, Wasfi Kanj, El Zoughbi Amine, and Aramouni Philippe. "Micromovement Evaluation of Original and Compatible Abutments at the Implant–abutment Interface." Journal of Contemporary Dental Practice 17, no. 11 (2016): 907–13. http://dx.doi.org/10.5005/jp-journals-10024-1952.

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ABSTRACT Introduction Use of compatible abutments may increase micromovements between the abutments, and the inner part of the implant may increase the stress on marginal bone level. Also micromovement will change the volume of the inner space of the implant–abutment complex. The resulting pumping effect can transport even initially immobile microorganisms from the exterior to the interior and vice versa. Objectives The purpose of the study was to evaluate the mechanical comportment of OsseoSpeed™ Tx implants connected with original and compatible abutments in vitro under simulated clinical lo

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28

Hou, Chongyang, Shuye Zhang, Rui Liu, et al. "Boosting flexible electronics with integration of two‐dimensional materials." InfoMat 6, no. 7 (2024): e12555. https://doi.org/10.1002/inf2.12555.

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This dataset includes original TIFF and PNG data from original research within the project EBEAM. Precisely, there are 15 final, complex Figures, two Schemes, seven Tables, and the final PDF version of the article below: PDF of the article final version "Boosting flexible electronics with integration of two‐dimensional materials" Figure 1. Machine learning‐assisted temperature-pressure electronic skin with decoupling capability (TPD e skin) enables object recognition. (A) Principle of using machine learning to recognize objects via e‐skin. (B) Structure of a one‐dimensional convolutional neura

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29

Villarreal, DL, WH Krautschneider, and D. Schroeder. "A Treatise of the Physical Aspects of Phosphenes and Single-Cell Selectivity in Retinal Stimulation." September 23, 2017. https://doi.org/10.19070/2572-7389-170008.

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<strong>Objective</strong>: Artificial vision is currently in an early-stage of maturity. This can be understood as a falling short of visual prosthesis to generate a complete visual scene with detail perception. Similarly, the physical aspects of phosphenes or spots of light demand a better understanding. <strong>Approach</strong>: This study introduces the strategy of the activation area and pinpoints its usefulness to estimate the amount of cells activated and identify the size and shape of the phosphenes. A simulation framework was built by integrating the relevant retinal interface elemen

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30

Holiel, Heidi Ahmed, Sahar Ali Fawzi, and Walid Al‐Atabany. "Pre‐processing visual scenes for retinal prosthesis systems: A comprehensive review." Artificial Organs, July 18, 2024. http://dx.doi.org/10.1111/aor.14824.

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AbstractBackgroundRetinal prostheses offer hope for individuals with degenerative retinal diseases by stimulating the remaining retinal cells to partially restore their vision. This review delves into the current advancements in retinal prosthesis technology, with a special emphasis on the pivotal role that image processing and machine learning techniques play in this evolution.MethodsWe provide a comprehensive analysis of the existing implantable devices and optogenetic strategies, delineating their advantages, limitations, and challenges in addressing complex visual tasks. The review extends

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31

Nejad, Ashkan, Burcu Küçükoǧlu, Jaap de Ruyter van Steveninck, et al. "Point-SPV: end-to-end enhancement of object recognition in simulated prosthetic vision using synthetic viewing points." Frontiers in Human Neuroscience 19 (March 24, 2025). https://doi.org/10.3389/fnhum.2025.1549698.

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Prosthetic vision systems aim to restore functional sight for visually impaired individuals by replicating visual perception by inducing phosphenes through electrical stimulation in the visual cortex, yet there remain challenges in visual representation strategies such as including gaze information and task-dependent optimization. In this paper, we introduce Point-SPV, an end-to-end deep learning model designed to enhance object recognition in simulated prosthetic vision. Point-SPV takes an initial step toward gaze-based optimization by simulating viewing points, representing potential gaze lo

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32

van der Grinten, Maureen, Jaap de Ruyter van Steveninck, Antonio Lozano, et al. "Towards biologically plausible phosphene simulation for the differentiable optimization of visual cortical prostheses." eLife 13 (February 22, 2024). http://dx.doi.org/10.7554/elife.85812.

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Blindness affects millions of people around the world. A promising solution to restoring a form of vision for some individuals are cortical visual prostheses, which bypass part of the impaired visual pathway by converting camera input to electrical stimulation of the visual system. The artificially induced visual percept (a pattern of localized light flashes, or ‘phosphenes’) has limited resolution, and a great portion of the field’s research is devoted to optimizing the efficacy, efficiency, and practical usefulness of the encoding of visual information. A commonly exploited method is non-inv

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33

Wang, Haozhe Zac, and Yan T. Wong. "A novel simulation paradigm utilizing MRI-derived phosphene maps for cortical prosthetic vision." Journal of Neural Engineering, August 2, 2023. http://dx.doi.org/10.1088/1741-2552/aceca2.

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Abstract Objective: We developed a realistic simulation paradigm for cortical prosthetic vision and investigated whether we can improve visual performance using a novel clustering algorithm.&#xD;Approach: Cortical visual prostheses have been developed to restore sight by stimulating the visual cortex. To investigate the visual experience, previous studies have used uniform phosphene maps, which may not accurately capture generated phosphene map distributions of implant recipients. The current simulation paradigm was based on the Human Connectome Project retinotopy dataset and the placement

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34

de Ruyter van Steveninck, Jaap, Mo Nipshagen, Marcel van Gerven, Umut Güçlü, Yağmur Güçlüturk, and Richard van Wezel. "Gaze-contingent processing improves mobility, scene recognition and visual search in simulated head-steered prosthetic vision." Journal of Neural Engineering, March 19, 2024. http://dx.doi.org/10.1088/1741-2552/ad357d.

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Abstract OBJECTIVE:&#xD;The enabling technology of visual prosthetics for the blind is making rapid progress. However, there are still uncertainties regarding the functional outcomes, which can depend on many design choices in the development. In visual prostheses with a head-mounted camera, a particularly challenging question is how to deal with the gaze-locked visual percept associated with spatial updating conflicts in the brain. The current study investigates a recently proposed compensation strategy based on gaze-contingent image processing with eye-tracking. Gaze-contingent processin

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35

van Lohuizen, Quintin, Christian Roest, Frank F. J. Simonis, et al. "Assessing deep learning reconstruction for faster prostate MRI: visual vs. diagnostic performance metrics." European Radiology, May 9, 2024. http://dx.doi.org/10.1007/s00330-024-10771-y.

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Abstract Objective Deep learning (DL) MRI reconstruction enables fast scan acquisition with good visual quality, but the diagnostic impact is often not assessed because of large reader study requirements. This study used existing diagnostic DL to assess the diagnostic quality of reconstructed images. Materials and methods A retrospective multisite study of 1535 patients assessed biparametric prostate MRI between 2016 and 2020. Likely clinically significant prostate cancer (csPCa) lesions (PI-RADS $$\ge$$ ≥ 4) were delineated by expert radiologists. T2-weighted scans were retrospectively unders

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Ruiz-Serra, Jaime, Jack White, Stephen Petrie, Tatiana Kameneva, and Chris McCarthy. "Learning scene representations for human-assistive displays using self-attention networks." ACM Transactions on Multimedia Computing, Communications, and Applications, March 2, 2024. http://dx.doi.org/10.1145/3650111.

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Video-see-through (VST) augmented reality (AR) is widely used to present novel augmentative visual experiences by processing video frames for viewers. Among VST AR systems, assistive vision displays aim to compensate for low vision or blindness, presenting enhanced visual information to support activities of daily living for the vision impaired/deprived. Despite progress, current assistive displays suffer from a visual information bottleneck, limiting their functional outcomes compared to healthy vision. This motivates the exploration of methods to selectively enhance and augment salient visua

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Elnabawy, Reham H., Slim Abdennadher, Olaf Hellwich, and Seif Eldawlatly. "PVGAN: A generative adversarial network for object simplification in prosthetic vision." Journal of Neural Engineering, August 18, 2022. http://dx.doi.org/10.1088/1741-2552/ac8acf.

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Abstract Objective. By means of electrical stimulation of the visual system, visual prostheses provide promising solution for blind patients through partial restoration of their vision. Despite the great success achieved so far in this field, the limited resolution of the perceived vision using these devices hinders the ability of visual prostheses users to correctly recognize viewed objects. Accordingly, we propose a deep learning approach based on Generative Adversarial Networks (GANs), termed PVGAN, to enhance object recognition for the implanted patients by representing objects in the fiel

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Fine, Ione, and Geoffrey M. Boynton. "A virtual patient simulation modeling the neural and perceptual effects of human visual cortical stimulation, from pulse trains to percepts." Scientific Reports 14, no. 1 (2024). http://dx.doi.org/10.1038/s41598-024-65337-1.

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AbstractThe field of cortical sight restoration prostheses is making rapid progress with three clinical trials of visual cortical prostheses underway. However, as yet, we have only limited insight into the perceptual experiences produced by these implants. Here we describe a computational model or ‘virtual patient’, based on the neurophysiological architecture of V1, which successfully predicts the perceptual experience of participants across a wide range of previously published human cortical stimulation studies describing the location, size, brightness and spatiotemporal shape of electricall

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Paraskevoudi, Nadia, and John S. Pezaris. "Full gaze contingency provides better reading performance than head steering alone in a simulation of prosthetic vision." Scientific Reports 11, no. 1 (2021). http://dx.doi.org/10.1038/s41598-021-86996-4.

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AbstractThe visual pathway is retinotopically organized and sensitive to gaze position, leading us to hypothesize that subjects using visual prostheses incorporating eye position would perform better on perceptual tasks than with devices that are merely head-steered. We had sighted subjects read sentences from the MNREAD corpus through a simulation of artificial vision under conditions of full gaze compensation, and head-steered viewing. With 2000 simulated phosphenes, subjects (n = 23) were immediately able to read under full gaze compensation and were assessed at an equivalent visual acuity

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Antolik, Jan, Quentin Sabatier, Charlie Galle, Yves Frégnac, and Ryad Benosman. "Assessment of optogenetically-driven strategies for prosthetic restoration of cortical vision in large-scale neural simulation of V1." Scientific Reports 11, no. 1 (2021). http://dx.doi.org/10.1038/s41598-021-88960-8.

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AbstractThe neural encoding of visual features in primary visual cortex (V1) is well understood, with strong correlates to low-level perception, making V1 a strong candidate for vision restoration through neuroprosthetics. However, the functional relevance of neural dynamics evoked through external stimulation directly imposed at the cortical level is poorly understood. Furthermore, protocols for designing cortical stimulation patterns that would induce a naturalistic perception of the encoded stimuli have not yet been established. Here, we demonstrate a proof of concept by solving these issue

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Catherine, A. Todd, and Naghdy Fazel. "Real-time Haptic Modeling and Simulation for Prosthetic Insertion." International Journal of Medical, Medicine and Health Sciences 4.0, no. 1 (2011). https://doi.org/10.5281/zenodo.1327674.

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In this work a surgical simulator is produced which enables a training otologist to conduct a virtual, real-time prosthetic insertion. The simulator provides the Ear, Nose and Throat surgeon with real-time visual and haptic responses during virtual cochlear implantation into a 3D model of the human Scala Tympani (ST). The parametric model is derived from measured data as published in the literature and accounts for human morphological variance, such as differences in cochlear shape, enabling patient-specific pre- operative assessment. Haptic modeling techniques use real physical data and inser

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Sørland, Kaia I., Christopher G. Trimble, Chia‐Yin Wu, Tone F. Bathen, Mattijs Elschot, and Martijn A. Cloos. "Reducing femoral flow artefacts in radial magnetic resonance fingerprinting of the prostate using region‐optimised virtual coils." NMR in Biomedicine, March 21, 2024. http://dx.doi.org/10.1002/nbm.5136.

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AbstractHigh acceleration factors in radial magnetic resonance fingerprinting (MRF) of the prostate lead to strong streak‐like artefacts from flow in the femoral blood vessels, possibly concealing important anatomical information. Region‐optimised virtual (ROVir) coils is a beamforming‐based framework to create virtual coils that maximise signal in a region of interest while minimising signal in a region of interference. In this study, the potential of removing femoral flow streak artefacts in prostate MRF using ROVir coils is demonstrated in silico and in vivo. The ROVir framework was applied

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Onita, Tetsushu, Kogenta Nakamura, Genya Nishikawa, et al. "Prostatic Pharmacokinetic and Pharmacodynamic Analysis of Ceftazidime: Dosing Strategy for Bacterial Prostatitis." Journal of Clinical Pharmacology, August 26, 2024. http://dx.doi.org/10.1002/jcph.6119.

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AbstractThis study aimed to develop a prostatic pharmacokinetic model of ceftazidime and suggest more effective dosing strategy for the bacterial prostatitis, based on a site‐specific pharmacokinetic and pharmacodynamic perspective. Subjects were prostatic hyperplasia patients prophylactically receiving a 0.5‐h infusion of 1.0 g or 2.0 g ceftazidime before transurethral resection of the prostate. Plasma and prostate samples were premeditatedly collected after the administration and the concentrations were measured by high‐performance liquid chromatography. The prostate tissue/plasma ratio in a

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Cantú-Delgado, Norman Alexis, and Héctor Mauricio Garnica-Garza. "Feasibility of Radiotherapy Fiducial Marker Tracking via Single-Shot X-ray Acoustic Tomography." Technology in Cancer Research & Treatment 24 (June 2025). https://doi.org/10.1177/15330338251342867.

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Introduction in radiotherapy, fiducial markers improve the accuracy of radiation delivery, and their use has become increasingly important in the treatment of various cancers, particularly those in the prostate and lung. This work aims to determine, via Monte Carlo simulations and numerical ultrasound transport, the feasibility of fiducial marker localization via single-shot x-ray acoustic computed tomography. Methods patient data from CT scans for two treatment sites, prostate and lung, were used to model the fiducial marker localization process. Monte Carlo simulation was used to calculate t

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Liu, Yixian, Yongji He, Xiaohui Qi, et al. "Population Pharmacokinetics Modeling and Simulation of Deutenzalutamide, A Novel Androgen Receptor Antagonist, in Patients With Metastatic Castration‐Resistant Prostate Cancer." Clinical Pharmacology in Drug Development, October 4, 2024. http://dx.doi.org/10.1002/cpdd.1477.

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AbstractDeutenzalutamide is a new molecular entity androgen receptor antagonist. The primary aim of this study was to develop a population pharmacokinetic model of deutenzalutamide and evaluate effects of intrinsic and extrinsic factors on pharmacokinetics. A nonlinear mixed‐effects modeling approach was performed to develop the population pharmacokinetic of deutenzalutamide using data from 1 Phase I trial of deutenzalutamide. Goodness‐of‐fit plots, prediction‐corrected visual predictive check, and bootstrap analysis were carried out to evaluate the final model. Simulation for the developed mo

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Lv, Longwei, Wei He, Hongqiang Ye, et al. "Interdisciplinary 3D digital treatment simulation before complex esthetic rehabilitation of orthodontic, orthognathic and prosthetic treatment: workflow establishment and primary evaluation." BMC Oral Health 22, no. 1 (2022). http://dx.doi.org/10.1186/s12903-022-02070-z.

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Abstract Background An interdisciplinary treatment simulation and smile design before a complex esthetic rehabilitation is important for clinicians’ decision-making and patient motivation. Meanwhile, intervention and interaction are necessary for dental specialists in these complex rehabilitations. However, it is difficult to visualize an interdisciplinary treatment plan by using the conventional method, especially when orthognathic surgery is involved, thus hindering communication between dental specialists. This research aims to establish a 3D digital workflow of interdisciplinary treatment

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Al-Mamun, Abdullah, S. M. Arifuzzaman, Sk Reza-E-Rabbi, Umme Sara Alam, Saiful Islam, and Md Shakhaoath Khan. "Numerical simulation of periodic MHD casson nanofluid flow through porous stretching sheet." SN Applied Sciences 3, no. 2 (2021). http://dx.doi.org/10.1007/s42452-021-04140-3.

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AbstractThe perspective of this paper is to characterize a Casson type of Non-Newtonian fluid flow through heat as well as mass conduction towards a stretching surface with thermophoresis and radiation absorption impacts in association with periodic hydromagnetic effect. Here heat absorption is also integrated with the heat absorbing parameter. A time dependent fundamental set of equations, i.e. momentum, energy and concentration have been established to discuss the fluid flow system. Explicit finite difference technique is occupied here by executing a procedure in Compaq Visual Fortran 6.6a t

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Vagni, Marica, Huong Elena Tran, Francesco Catucci, et al. "Impact of bias field correction on 0.35 T pelvic MR images: evaluation on generative adversarial network-based OARs’ auto-segmentation and visual grading assessment." Frontiers in Oncology 14 (March 28, 2024). http://dx.doi.org/10.3389/fonc.2024.1294252.

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PurposeMagnetic resonance imaging (MRI)-guided radiotherapy enables adaptive treatment plans based on daily anatomical changes and accurate organ visualization. However, the bias field artifact can compromise image quality, affecting diagnostic accuracy and quantitative analyses. This study aims to assess the impact of bias field correction on 0.35 T pelvis MRIs by evaluating clinical anatomy visualization and generative adversarial network (GAN) auto-segmentation performance.Materials and methods3D simulation MRIs from 60 prostate cancer patients treated on MR-Linac (0.35 T) were collected an

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Arias-Amezquita, Eduardo, Lee Alkureishi, Chad Purnell, et al. "Virtual Reality Planning in Reconstructive Surgery for Orbital Prosthetic Rehabilitation Using ImmersiveTouch Platform: Preliminary Report." Journal of Craniofacial Surgery, October 27, 2023. http://dx.doi.org/10.1097/scs.0000000000009794.

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Background/Purpose: Virtual reality (VR) is emerging as an effective and intuitive surgical planning and 3D visualization tool. Digital surgical planning is the gold standard for planning the placement of implants in maxillofacial prosthetics, but the field lacks a platform exclusively designed to perform the task. Virtual reality planning (VRP) specific for maxillofacial prosthetics offers the clinician improved control of the presurgical planning and the potential to limit the need to adapt other advanced segmentation software. Furthermore, the virtual plan can be directly translated to the

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Butt, Emma, Bing-Yi Wang, Andrew Shin, et al. "Three-dimensional electro-neural interfaces electroplated on subretinal prostheses." Journal of Neural Engineering, February 16, 2024. http://dx.doi.org/10.1088/1741-2552/ad2a37.

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Abstract Objective. High-resolution retinal prosthetics offer partial sight restoration to patients blinded by retinal degenerative diseases through electrical stimulation of remaining neurons. Decreasing pixel size enables increasing prosthetic visual acuity, as demonstrated in animal models of retinal degeneration. However, scaling down the size of planar pixels is limited by the reduced penetration depth of the electric field in tissue. We investigated 3-dimensional structures on top of photovoltaic arrays for enhanced penetration of the electric field, permitting higher resolution implants

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