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Journal articles on the topic 'Scan duration'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Vernaleken, Ingo, Lisa Peters, Mardjan Raptis, et al. "The applicability of SRTM in [18F]fallypride PET investigations: Impact of scan durations." Journal of Cerebral Blood Flow & Metabolism 31, no. 9 (2011): 1958–66. http://dx.doi.org/10.1038/jcbfm.2011.73.

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The high-affinity radioligand [18F]fallypride (FP) is frequently used for quantification of striatal/extrastriatal D2/3 receptors and the receptor occupancies of antipsychotics (APs). Its 110 minutes half-life allows long scan durations. However, the optimum scan duration is a matter of debate. This investigation focuses on scan-duration-related effects on simplified reference tissue model (SRTM) results and the time point of transient equilibrium in a large sample of dynamic FP positron emission tomography (PET) scans. Fifty drug-free and 50 AP-treated subjects underwent FP-PET scans (180 min

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Abdul Wahab, Nor Shafiza, Noorazrul Yahya, Ahmad Nazlim Yusoff, et al. "Effects of Different Scan Duration on Brain Effective Connectivity among Default Mode Network Nodes." Diagnostics 12, no. 5 (2022): 1277. http://dx.doi.org/10.3390/diagnostics12051277.

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Background: Resting-state functional magnetic resonance imaging (rs-fMRI) can evaluate brain functional connectivity without requiring subjects to perform a specific task. This rs-fMRI is very useful in patients with cognitive decline or unable to respond to tasks. However, long scan durations have been suggested to measure connectivity between brain areas to produce more reliable results, which are not clinically optimal. Therefore, this study aims to evaluate a shorter scan duration and compare the scan duration of 10 and 15 min using the rs-fMRI approach. Methods: Twenty-one healthy male an

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Kremp, S., D. Hellwig, Chr Alexander, C.-M. Kirsch, and A. Schaefer. "Influence of single-photon-transmission scan duration measured with the ECAT ART PET-scanner." Nuklearmedizin 39, no. 06 (2000): 156–65. http://dx.doi.org/10.1055/s-0038-1632264.

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Summary Aim: The aim was to study the influence of singlephoton-transmission scan duration in 3D-PET on the quantitative values of attenuation coefficients and noise in transmission images and of activity concentrations and noise in attenuation corrected emission images of thorax phantom- and patient data. Method and material: Using dual collimated Cs-137 singles transmission sources (Eγ = 662 keV, A = 2* 614 MBq) on an ECAT ART tomograph series of transmission scans of a thorax phantom were acquired pre- and post-injection of 18F. 17 patients underwent two transmission scans. The scan time of

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de la Rosa, Ezequiel, Diana M. Sima, Jan S. Kirschke, Bjoern Menze, and David Robben. "Detecting CTP truncation artifacts in acute stroke imaging from the arterial input and the vascular output functions." PLOS ONE 18, no. 3 (2023): e0283610. http://dx.doi.org/10.1371/journal.pone.0283610.

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Background Current guidelines for CT perfusion (CTP) in acute stroke suggest acquiring scans with a minimal duration of 60-70 s. But even then, CTP analysis can be affected by truncation artifacts. Conversely, shorter acquisitions are still widely used in clinical practice and may, sometimes, be sufficient to reliably estimate lesion volumes. We aim to devise an automatic method that detects scans affected by truncation artifacts. Methods Shorter scan durations are simulated from the ISLES’18 dataset by consecutively removing the last CTP time-point until reaching a 10 s duration. For each tru

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Maharani, Virda, Arie Utariani, Lucky Andriyanto, and Bambang Harjono. "The Length Of Stay In Patients Undergoing Diagnostic MRI And CT-Scan With Intravenous Anesthesia At Outpatient Clinic Dr. Soetomo General Hospital: An Overview." Journal of Health Sciences 14, no. 02 (2021): 97–102. http://dx.doi.org/10.33086/jhs.v14i02.1748.

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Background: Magnetic Resonance Imaging (MRI) and Computerized Tomography (CT) Scans might be challenging for children or patients with anxiety or claustrophobia. The use of general anesthesia aims to increase the success rate, but inadequate management can result in longer length of stay. Purpose: To analyze patients' length of stay on MRI and CT-scan with intravenous anesthesia. Methods: A descriptive observational study. The datas were collected retrospectively from the medical records in General Diagnostic Center. Total of 721 patients who underwent MRI or CT Scan procedures with intravenou

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Holden, J. E., L. Eriksson, P. E. Roland, S. Stone-Elander, L. Widen, and M. Kesselberg. "Direct Comparison of Single-Scan Autoradiographic with Multiple-Scan Least-Squares Fitting Approaches to PET CMRO2 Estimation." Journal of Cerebral Blood Flow & Metabolism 8, no. 5 (1988): 671–80. http://dx.doi.org/10.1038/jcbfm.1988.114.

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The time course of local cerebral radioactivity concentration after bolus inhalation of oxygen gas labeled with O-15 was measured in a rapid dynamic sequence of positron tomographic images. Four normal subjects were studied at rest. In each study, 15 multiple-slice image sets were acquired over a 3-min period in a Scanditronix model 384 tomograph. The radioactivity concentration in arterial blood was measured at 1-s intervals by means of a pump-fed flow-through detector. Pump effluent was directed to discrete samples that were separated into plasma and cell fractions to estimate the accumulati

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Lumish, Heidi S., Manavjot S. Sidhu, Kimberly Kallianos, Thomas J. Brady, Udo Hoffmann, and Brian B. Ghoshhajra. "Reporting Scan Time Reduces Cardiac MR Examination Duration." Journal of the American College of Radiology 11, no. 4 (2014): 425–28. http://dx.doi.org/10.1016/j.jacr.2013.05.037.

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Dietze, Martijn M. A., Britt Kunnen, Casper Beijst, and Hugo W. A. M. Jong. "Adaptive scan duration in SPECT: Evaluation for radioembolization." Medical Physics 47, no. 5 (2020): 2128–38. http://dx.doi.org/10.1002/mp.14095.

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Tuncel, Hayel, Denise Visser, Maqsood Yaqub, et al. "Effect of Shortening the Scan Duration on Quantitative Accuracy of [18F]Flortaucipir Studies." Molecular Imaging and Biology 23, no. 4 (2021): 604–13. http://dx.doi.org/10.1007/s11307-021-01581-5.

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Abstract Purpose Dynamic positron emission tomography (PET) protocols allow for accurate quantification of [18F]flortaucipir-specific binding. However, dynamic acquisitions can be challenging given the long required scan duration of 130 min. The current study assessed the effect of shorter scan protocols for [18F]flortaucipir on its quantitative accuracy. Procedures Two study cohorts with Alzheimer’s disease (AD) patients and healthy controls (HC) were included. All subjects underwent a 130-min dynamic [18F]flortaucipir PET scan consisting of two parts (0–60/80–130 min) post-injection. Arteria

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Halvachizadeh, Sascha, Till Berk, Alexander Pieringer, et al. "Is the Additional Effort for an Intraoperative CT Scan Justified for Distal Radius Fracture Fixations? A Comparative Clinical Feasibility Study." Journal of Clinical Medicine 9, no. 7 (2020): 2254. http://dx.doi.org/10.3390/jcm9072254.

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Introduction: It is currently unclear whether the additional effort to perform an intraoperative computed tomography (CT) scan is justified for articular distal radius fractures (DRFs). The purpose of this study was to assess radiological, functional, and clinical outcomes after surgical treatment of distal radius fractures when using conventional fluoroscopy vs. intraoperative CT scans. Methods: Inclusion criteria: Surgical treatment of DRF between 1 January 2011 and 31 December 2011, age 18 and above. Group distribution: intraoperative conventional fluoroscopy (Group Conv) or intraoperative

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Flamm, Scott D. "Re: “Reporting Scan Time Reduces Cardiac MR Examination Duration”." Journal of the American College of Radiology 11, no. 8 (2014): 836. http://dx.doi.org/10.1016/j.jacr.2014.06.009.

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Saha, Chinmoy Kumar, RN Sarker, Dipa Saha, et al. "Chest CT findings in COVID 19 disease in relation with duration of illness: A study of two hundred cases." Central Medical College Journal 5, no. 2 (2022): 70–75. http://dx.doi.org/10.3329/cemecj.v5i2.61485.

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Chest CT scans of 200 symptomatic patients infected with COVID 19 from different health facilities and home were reviewed for common CT findings in relationship with their clinical symptoms, comorbidities and the time between symptom onset and the initial CT scan was studied in this cross-sectional study. Cases were categorized into three groups according to the timing of HRCT, 10 cases were in early (0-2days), 56 cases in intermediate (3-5days) and 110 cases were in late (6-12days) groups. Chest CT scan images showed bilateral peripheral ground glass opacities 96.63%, pulmonary consolidations

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Aksum, Karl Marius, Lars Brotangen, Christian Thue Bjørndal, Lukas Magnaguagno, and Geir Jordet. "Scanning activity of elite football players in 11 vs. 11 match play: An eye-tracking analysis on the duration and visual information of scanning." PLOS ONE 16, no. 8 (2021): e0244118. http://dx.doi.org/10.1371/journal.pone.0244118.

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Visual perception in football (“soccer” in the U.S.) is increasingly becoming a key area of interest for researchers and practitioners. This exploratory case study investigated a sub-set of visual perception, namely visual exploratory scanning. The aim of this study was to examine the scanning of four elite football midfield players in an 11 vs. 11 real-game environment using mobile eye-tracking technology. More specifically, we measured the duration and information (number of teammates and opponents) of the players’ scanning behavior. The results showed that the players’ scanning duration was

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Azmi, Nordiyana, Syed Ejaz Shamim, Azriani Berahim @ Ab. Rahman, Noraida Ramli, Hans Van Rostenberghe, and Mohamad Ikram Ilias. "Clinical Profiles and Outcomes of Renal Scarring in Children Underwent Dimercaptosuccinic Acid (DMSA) Renal Scan in A Tertiary Hospital." Malaysian Journal of Paediatrics and Child Health 28, no. 2 (2022): 49–53. http://dx.doi.org/10.51407/mjpch.v28i2.193.

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Introduction: Renal scarring, which can be detected by DMSA renal scan, has been demonstrated to cause hypertension, proteinuria and chronic kidney disease (CKD). We reviewed the proportion of renal scarring, risk factors and outcomes among children who were referred for DMSA scan in a tertiary teaching hospital. Methods: All records of children less than 18 years old who underwent DMSA scan over a ten-year period, were reviewed. Among children whose renal cortical defects were confirmed by DMSA scan, data of their risk factors and its outcome were collected manually. Results: Out of 92 childr

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Patel, Parul, Arvind Rajawat, and Pooja Jain. "Comparative Analysis of Simulation Techniques: Scan Compression and Internal Scan." International Journal on Cybernetics & Informatics 12, no. 5 (2023): 15–22. http://dx.doi.org/10.5121/ijci.2023.120502.

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With advancement in technology, the feature size of transistors is shrinking and the transistor count in a circuit design is exponentially increasing. As a result, it is hard to control and observe internal nodes leading to complexity in locating and debugging faults specially for sequential circuits. Design for Testability (DFT) provides a way for fault detection of the circuit under test in less simulation duration with little increase in area. Many techniques are proposed under DFT for pattern simulation. In this paper, we have compared two such pattern simulation techniques namely scan com

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Kiani, Asma Afzal, Sara Haider, Sana Sharif, Khadija tul Kubra, Khushbu Fatima, and Nadia Murtaza. "Comparison of Haller Index Values Calculated with Chest Radiographs versus Computed Tomography for Pectus Excavatum Evaluation." Pakistan Armed Forces Medical Journal 74, no. 1 (2024): 216–19. http://dx.doi.org/10.51253/pafmj.v74i1.7465.

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Objective: To compare and correlate the value of the Haller index calculated with chest x-ray with the values calculated with a Computed Tomography (CT) scan. Study Design: Cross-sectional study. Place and Duration of Study: Department of Radiology, Combined Military Hospital, Peshawar Pakistan, from Jan to Jun 2018. Methodology: A total of 50 male patients aged ≥16 years presenting with pectus excavatum were included. Haller index was calculated after CT scan and X-ray. Results: The mean age of the patients was 20.20±2.34 years. The mean Haller Index for CT scan was 2.35±0.39, and the mean Ha

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Ganjoo, Kristen N., Rebecca J. Chan, Matt Sharma, and Lawrence H. Einhorn. "Positron Emission Tomography Scans in the Evaluation of Postchemotherapy Residual Masses in Patients With Seminoma." Journal of Clinical Oncology 17, no. 11 (1999): 3457–60. http://dx.doi.org/10.1200/jco.1999.17.11.3457.

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PURPOSE: To assess the ability of positron emission tomography (PET) scans in differentiating between necrosis and viable seminoma in postchemotherapy (PC) residual disease. PATIENTS AND METHODS: We conducted a prospective study of 29 patients with seminoma at Indiana University. All patients had PC residual disease. Computed tomography and PET scans were performed for 19 patients after primary chemotherapy (group A) and for 10 patients after salvage chemotherapy (group B). RESULTS: In group A, the PC masses were ≥ 3 cm in 14 patients, less than 3 cm in three patients, and not quantified in tw

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Waugh, Christian E., Pareezad Zarolia, Iris B. Mauss, et al. "Emotion regulation changes the duration of the BOLD response to emotional stimuli." Social Cognitive and Affective Neuroscience 11, no. 10 (2016): 1550–59. http://dx.doi.org/10.1093/scan/nsw067.

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Casey, Kenneth L., Thomas J. Morrow, Jürgen Lorenz, and Satoshi Minoshima. "Temporal and Spatial Dynamics of Human Forebrain Activity During Heat Pain: Analysis by Positron Emission Tomography." Journal of Neurophysiology 85, no. 2 (2001): 951–59. http://dx.doi.org/10.1152/jn.2001.85.2.951.

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To learn about the sequence of brain activation patterns during heat pain, we acquired positron emission tomographic (PET) brain scans at different times during repetitive heat stimulation (40 or 50°C; 5-s contact) of each subject's left forearm. Early scans began at the onset of 60 s of stimulation; late scans began after 40 s of stimulation, which continued throughout the 60-s scan period (total stimulus duration 100 s). Each subject (14 normal, right-handed subjects; 10 male, 4 female; ages 18–42) used a visual analog scale to rate the perceived stimulus intensity (0 = no heat, 7 = pain thr

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Murphy, Kevin, Jerzy Bodurka, and Peter A. Bandettini. "How long to scan? The relationship between fMRI temporal signal to noise ratio and necessary scan duration." NeuroImage 34, no. 2 (2007): 565–74. http://dx.doi.org/10.1016/j.neuroimage.2006.09.032.

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Rahlves, Charlotte, Frank Beyrich, and Siegfried Raasch. "Scan strategies for wind profiling with Doppler lidar – an large-eddy simulation (LES)-based evaluation." Atmospheric Measurement Techniques 15, no. 9 (2022): 2839–56. http://dx.doi.org/10.5194/amt-15-2839-2022.

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Abstract. Doppler-lidar scan techniques for wind profiling rely on the assumption of a horizontally homogeneous wind field and stationarity for the duration of the scan. As this condition is mostly violated in reality, detailed knowledge of the resulting measurement error is required. The objective of this study is to quantify and compare the expected error associated with Doppler-lidar wind profiling for different scan strategies and meteorological conditions by performing virtual Doppler-lidar measurements implemented in a large-eddy simulation (LES) model. Various factors influencing the li

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Meyer, Abby C., Tyler G. Kimbrough, Marsha Finkelstein, and James D. Sidman. "Symptom Duration and CT Findings in Pediatric Neck Infection." Otolaryngology–Head and Neck Surgery 139, no. 2_suppl (2008): P69. http://dx.doi.org/10.1016/j.otohns.2008.05.221.

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Objective To test the hypothesis that children with less than 48 hours of localized symptoms of deep space neck infections are less likely to have an abscess on CT than children with at least 48 hours of localized symptoms. Methods Children seen in a tertiary hospital between 2000 and 2007 with infections of the head and neck region, excluding peritonsillar abscess, were identified. Data regarding presentation, physical exam findings, radiographic findings, and treatment were extracted. Results Of 179 children identified, 167 (93.3%) underwent a CT scan of the neck, of which 102 (61.1%) were p

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SN, Cookey, Asikimabo-Ofori D, Briggs FK, Gomba VE, and Harry BB. "Duplex Carotid Vascular Scan in Diabetics." IOSR Journal of Dental and Medical Sciences 24, no. 6 (2025): 36–46. https://doi.org/10.9790/0853-2406063646.

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Introduction: Cardiovascular diseases are leading global causes of mortality, with diabetes mellitus (DM) serving as a significant risk factor. Type 2 DM intensifies the atherosclerotic process and causes endothelial dysfunction via glycoxidative products, resulting in vascular complications. This study aims to compare duplex carotid findings in diabetic patients and non-diabetic and evaluate their relation between disease duration and vascular findings. Method: A cross-sectional analytical study was conducted at a private facility: Haven cardiovascular and Specialist Clinics. Fifty-two diabet

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Drechsel, Susanne, Georg J. Mayr, Michel Chong, and Fotini K. Chow. "Volume Scanning Strategies for 3D Wind Retrieval from Dual-Doppler Lidar Measurements." Journal of Atmospheric and Oceanic Technology 27, no. 11 (2010): 1881–92. http://dx.doi.org/10.1175/2010jtecha1495.1.

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Abstract Dual-Doppler lidar volume scans for 3D wind retrieval must accommodate the conflicting goals of dense spatial coverage and short scan duration. In this work, various scanning strategies are evaluated with semisynthetic wind fields from analytical solutions and numerical simulations over flat and complex terrain using the Multiple-Doppler Synthesis and Continuity Adjustment Technique (MUSCAT) retrieval algorithm. The focus of this study is to determine how volume scan strategies affect performance of the wind retrieval algorithm. Interlaced scanning methods that take into account actua

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Evans, Ruth, Stuart Taylor, Sam Janes, et al. "Patient experience and perceived acceptability of whole-body magnetic resonance imaging for staging colorectal and lung cancer compared with current staging scans: a qualitative study." BMJ Open 7, no. 9 (2017): e016391. http://dx.doi.org/10.1136/bmjopen-2017-016391.

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ObjectiveTo describe the experience and acceptability of whole-body magnetic resonance imaging (WB-MRI) staging compared with standard scans among patients with highly suspected or known colorectal or lung cancer.DesignQualitative study using one-to-one interviews with thematic analysis.SettingPatients recruited from 10 hospitals in London, East and South East England between March 2013 and July 2014.Participants51 patients (31 male, age range 40–89 years), with varying levels of social deprivation, were recruited consecutively from two parallel clinical trials comparing the diagnostic accurac

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Lobato, Ramiro D., Rosario Sarabia, Juan J. Rivas, et al. "Normal computerized tomography scans in severe head injury." Journal of Neurosurgery 65, no. 6 (1986): 784–89. http://dx.doi.org/10.3171/jns.1986.65.6.0784.

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✓ The authors analyze the clinical course of 46 severely head-injured patients who had completely normal computerized tomography (CT) scans through the immediate posttraumatic period (1 to 7 days after trauma). These patients represent 10.2% of a consecutive series of 448 cases of severe head injuries and two-thirds of the cases showing a normal CT scan on admission (the other one-third of the cases developed new pathology). The usual course in these 46 patients after the initial coma was toward progressive neurological improvement, and 35 patients (76%) achieved a functional level of survival

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Burri, Christian, Simon Salzmann, Mylène Amstutz, et al. "Investigation of the Influence of Pulse Duration and Application Mode on Microsecond Laser Microsurgery of the Retinal Pigment Epithelium." Life 13, no. 6 (2023): 1314. http://dx.doi.org/10.3390/life13061314.

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Optical microsurgery confined to the retinal pigment epithelium (RPE) requires locally optimized laser parameters and reliable real-time feedback dosimetry (RFD) to prevent unwanted neuroretinal overexposure. This study aimed to compare pulses of different durations and application modes (single, ramp, burst). Moreover, optical coherence tomography (OCT)-based RFD was investigated in an ex vivo experiment, utilizing nine porcine eyes that were exposed to laser pulses of 8, 12, 16 and 20 µs duration (wavelength: 532 nm, exposure area: 90 × 90 µm2, radiant exposure: 247 to 1975 mJ/µm2). Simultan

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Aziz, Mubashrah, Sadia Mailk, Muniba Manzoor, Sadaf Aziz, Munazzah Aziz, and Muzammil Manzoor. "Diagnosis of Fungal Sinusitis; Is Fungal Culture a Must?" Pakistan Armed Forces Medical Journal 73, no. 2 (2023): 418–21. http://dx.doi.org/10.51253/pafmj.v73i2.8188.

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Objective: To determine the diagnostic accuracy of computed tomography (CT) of paranasal sinuses (PNS) in detecting fungal sinusitis keeping fungal culture as the gold standard. Study Design: Cross-sectional validation study. Place and Duration of Study: Department of Radiology, Combined Military Hospital, Rawalpindi Pakistan, from Jun 2018 to Jun 2019. Methodology: A total of 323 patients of either gender were included in the study (aged from 10-70 years). All the patients underwent plain CT scans of paranasal sinuses, and the CT scan findings were reported and recorded on p

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Mobeen, Arifa, Kainat Arshad, Sania Maqbool, et al. "Utility of Fast Scan in Blunt Abdominopelvic Trauma Patients in Lahore District." Pakistan Journal of Medical and Health Sciences 17, no. 4 (2023): 197–99. http://dx.doi.org/10.53350/pjmhs2023174197.

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Background: To evaluate the utility of fast scan in blunt abdominopelvic trauma patients in the emergency department of tertiary care hospitals in Lahore district. Focused assessment with sonography for trauma (FAST) has been used as the first assessment in diagnosing patients with trauma in the last decade, and we have heard people questioning its authenticity and reliability, and many other things. Methodology: The study design was cross-sectional .This study was conducted at various tertiary care hospitals of Lahore, in the time duration of 3 months from January 2022 to March 2022. One hund

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Pulagam, S. R., J. Johnson, K. Nelson, B. Kim, L. Kirchner, and E. Mamounas. "Role of (18) F-FDG PET scanning in detecting osseous metastases in non-small cell lung cancer (NSCLC) in a community setting: A retrospective data analysis." Journal of Clinical Oncology 24, no. 18_suppl (2006): 17067. http://dx.doi.org/10.1200/jco.2006.24.18_suppl.17067.

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17067 Background: Metastasis from a distant site is the most common neoplastic process involving bone. Accurate staging of NSCLC is critical for effective management. Bone scans have been traditionally used for diagnosing bone metastases in NSCLC. Recently, PET scanning has been shown to be effective in detecting bone metastases in several studies. In NSCLC, using a single PET scan to evaluate both the primary tumor and bone metastases might be more cost-effective and if the accuracy of PET scanning for detection of bone metastases can be established, the need for bone scanning may be obviated

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Burri, Christian, Alessa Hutfilz, Lorenz Grimm, et al. "Dynamic OCT Signal Loss for Determining RPE Radiant Exposure Damage Thresholds in Microsecond Laser Microsurgery." Applied Sciences 11, no. 12 (2021): 5535. http://dx.doi.org/10.3390/app11125535.

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Optical microsurgery of the retinal pigment epithelium (RPE) requires reliable real-time dosimetry to prevent unwanted overexposure of the neuroretina. The system used in this experiment implements optical coherence tomography (OCT) to detect the intentional elimination of RPE cells. We evaluated the performance of OCT dosimetry in terms of its ability to detect RPE cell damage caused by microsecond laser pulses of varying duration. Therefore, ex-vivo porcine RPE choroid sclera explants were embedded in an artificial eye and exposed to single laser pulses of 2–20 µs duration (wavelength: 532 n

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Shidahara, Miho, Hiroshi Ito, Tatsui Otsuka, et al. "Measurement Error Analysis for the Determination of Dopamine D2 Receptor Occupancy Using the Agonist Radioligand [11C]MNPA." Journal of Cerebral Blood Flow & Metabolism 30, no. 1 (2009): 187–95. http://dx.doi.org/10.1038/jcbfm.2009.193.

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The purpose of this study is to investigate errors in quantitative analysis for estimating dopamine D2 receptor occupancy of antipsychotics with agonist radioligand [11C]MNPA by numerical simulation, with particular attention to the validity of a quantitative approach based on the use of a reference region. Synthetic data were validated using clinical data combined with a bootstrap approach. Time–activity curves (TACs) of [11C]MNPA were simulated, and the reliability of binding potential (BPND) and occupancy estimated by nonlinear least square (NLS) fitting and a simplified reference tissue mo

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Gautam, Somiya, Ashwin Sonkamble, Poornima Sonkamble, and Usha Badole. "Comparative Evaluation of Effect, Onset & Duration of Intranasal Dexmedetomidine Vs Midazolam for Paediatric Sedation During Diagnostic CT Scan." Indian Journal of Anesthesia and Analgesia 9, no. 3 (2022): 119–23. http://dx.doi.org/10.21088/ijaa.2349.8471.9322.10.

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Background: Separation anxiety among children is common and normal.Children undergoing radiological imaging studies often require sedation to avoid panic episodes & severe anxiety for induction of Anaesthesia. It is important for the child to lie still during the scanning procedure & mostly we find it difficult for the children to keep still during a CT scan, which is usually about 10–15 minutes. This study aimed at comparing and evaluating the efficacy of use of intranasally administered Dexmedetomidine Vs intranasal midazolam for paediatric sedation undergoing diagnostic CT scan stud

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Demonaco, N. A., M. Wu, J. Osborn, et al. "Imaging results after CHOP-rituximab followed by 90Y ibritumomab tiuxetan and rituximab (R) in patients with previously-untreated follicular lymphoma (FL)." Journal of Clinical Oncology 24, no. 18_suppl (2006): 7589. http://dx.doi.org/10.1200/jco.2006.24.18_suppl.7589.

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7589 Background: There has been some question regarding the predictive value of 111In scans in FL. We report imaging results with fusion PET-CT scans and 111In scans in a single-institution, non-randomized, phase II trial in patients with FL treated with CHOP-R followed by 90Y ibritumomab tiuxetan (Zevalin (Z)) and R. Methods: Eligible patients have CD20 positive FL, Grade 1–3 or transformed, Stage II-IV, no prior treatment with monoclonal antibody or chemotherapy, and symptomatic disease (if grade 1–2). CHOP-R is given every 21 days for 3 cycles. Four weeks after the last dose of CHOP-R, pati

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Barzi, Afsaneh, Hanke Zheng, and Jeffrey McCombs. "Utilization of imaging and outcomes of care among metastatic colorectal cancer (mCRC) patients (pts) receiving bevacizumab containing regimens." Journal of Clinical Oncology 38, no. 15_suppl (2020): e14011-e14011. http://dx.doi.org/10.1200/jco.2020.38.15_suppl.e14011.

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e14011 Background: Chemotherapy combined with bevacizumab is the most commonly used treatment first line therapy in pts with mCRC. Decisions for continuation or change of chemotherapy are based on the findings of CT scan, the most commonly used from of imaging in this population. Modeled after clinical trials, CT scan every 2 months is adopted as a standard of care. Yet, patterns of utilization of CT scan in general population is unknown. We set to explore CT scan utilization and associated outcomes among pts with mCRC. Methods: The De-identified Clinformatics Data Mart (OptumInsight, Eden Pra

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Lucas, Théotim, Isabelle Quidu, S. Lori Bridal, and Jerome Gateau. "High-Contrast and -Resolution 3-D Ultrasonography with a Clinical Linear Transducer Array Scanned in a Rotate-Translate Geometry." Applied Sciences 11, no. 2 (2021): 493. http://dx.doi.org/10.3390/app11020493.

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We proposed a novel solution for volumetric ultrasound imaging using single-side access 3-D synthetic aperture scanning of a clinical linear array. This solution is based on an advanced scanning geometry and a software-based ultrasound platform. The rotate-translate scanning scheme increases the elevation angular aperture by pivoting the array (−45° to 45°) around its array axis (axis along the row of its elements) and then scans the imaged object for each pivoted angle by translating the array perpendicularly to the rotation axis. A theoretical basis is presented so that the angular and trans

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Beyer, T., P. E. Kinahan, and D. W. Townsend. "Optimization of transmission and emission scan duration in 3D whole-body PET." IEEE Transactions on Nuclear Science 44, no. 6 (1997): 2400–2407. http://dx.doi.org/10.1109/23.656442.

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Miller, Douglas L., Zhihong Dong, Chunyan Dou, and Krishnan Raghavendran. "Influence of Scan Duration on Pulmonary Capillary Hemorrhage Induced by Diagnostic Ultrasound." Ultrasound in Medicine & Biology 42, no. 8 (2016): 1942–50. http://dx.doi.org/10.1016/j.ultrasmedbio.2016.03.012.

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Dobber, L., M. Geurts, and M. van den Bent. "P27.26.B TUMOR GROWTH RATE IN RECURRENT GLIOBLASTOMA: WHEN TO PLAN THE BASELINE SCAN?" Neuro-Oncology 26, Supplement_5 (2024): v143. http://dx.doi.org/10.1093/neuonc/noae144.488.

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Abstract BACKGROUND Little is known about the growth rate of glioblastoma once disease progression occurs. This is relevant for the timing of baseline imaging for second-line treatment in clinical trials and subsequent response monitoring. If a tumor grows rapidly in the period between imaging and therapy initiation, adequate response assessment may be hindered leading to false interpretations of progression to the experimental treatment. Recommendations on the interval duration between baseline scanning and treatment initiation are inconsistent between the RANO 2.0 criteria and various study

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Sohu, Din Muhammad, Naimatullah Bozdar, Zeeshan Jamal, Inayat ullah, Akhtar Hussain Phul, and Rabia Hafeez. "Computed Tomography and Patient Risk: Facts, Perceptions and Uncertainties." Pakistan Journal of Medical and Health Sciences 16, no. 7 (2022): 47–48. http://dx.doi.org/10.53350/pjmhs2216747.

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Aim: To assess the role of computed tomography for management of Covid-19. Study design: Prospective study Place and duration of study: Department of Radiology, Ghulam Muhammad Mahar Medical College Teaching Hospital Sukkur from 1st November 2020 to 31st December 2021. Methodology: One hundred cases within various ages 5-55 years for analyzing their risk for CT scanning on them by highlighting the facts related to CT scan, patient perceptions and uncertainties regarding it. A 50 radiologist and 50 emergency doctors were also asked questions regarding their knowledge about CT scan risks and the

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Nienhuis, F. J., G. van de Willige, C. A. Th Rijnders, P. de Jonge, and D. Wiersma. "Validity of a short clinical interview for psychiatric diagnosis: the mini-SCAN." British Journal of Psychiatry 196, no. 1 (2010): 64–68. http://dx.doi.org/10.1192/bjp.bp.109.066563.

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BackgroundTo promote clinical application of the Schedules for Clinical Assessment in Neuropsychiatry (SCAN) system a shorter version (the mini-SCAN) was devised. Its psychometric properties were unknown.AimsTo establish the validity and practical properties of the mini-SCAN.MethodOne hundred and six participants were interviewed twice, once with the SCAN and once with the mini-SCAN. The level of agreement was established for the categories: no disorder, affective disorders, anxiety disorders, non-affective psychotic disorders, affective psychotic disorders.ResultsThe mini-SCAN is a valid inst

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Mishra, Rakesh Kumar, Ashok Munivenkatappa, Vasuki Prathyusha, Dhaval P. Shukla, and Bhagavatula Indira Devi. "Clinical predictors of abnormal head computed tomography scan in patients who are conscious after head injury." Journal of Neurosciences in Rural Practice 08, no. 01 (2017): 064–67. http://dx.doi.org/10.4103/0976-3147.193538.

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ABSTRACT Background: Indication of a head computed tomography (CT) scan in a patient who remains conscious after head injury is controversial. We aimed to determine the clinical features that are most likely to be associated with abnormal CT scan in patients with a history of head injury, and who are conscious at the time of presentation to casualty. Materials and Methods: This is a prospective observation study of patients presented to casualty with history of head injury, and who were conscious, i.e., Glasgow Coma Scale (GCS) 15 at the time of evaluation. All patients underwent head CT scan.

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Ahmadabadi, Farzad, Mehrdad Mirzarahimi, Adel Ahadi, and Zahra Alizadeh. "Frequency, causes, and findings of brain CT scans of neonatal seizure at Ardabil City Hospital, Ardabil, Iran." International Surgery Journal 7, no. 8 (2020): 2485. http://dx.doi.org/10.18203/2349-2902.isj20203227.

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Background: Neonatal seizures are the primary and most important signs of neurologic function disorders that often lead to serious complications. However, this disorder is predictable and manageable with suitable diagnostic and therapeutic methods. The aim of this study was to investigate the frequency, causes, and findings of brain CT scans of neonatal seizure.Methods: This descriptive cross-sectional study has been done on 70 neonates with seizures who hospitalized in Ardabil city hospital during 2016-2017. CT scans were done for all patients. Necessary information for each patient was recor

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Omar, Mohammed A., Yi Zhou, Rohit Parvataneni, and Eric Planting. "Calibrated Pulse-Thermography Procedure for Inspecting HDPE." Research Letters in Materials Science 2008 (2008): 1–4. http://dx.doi.org/10.1155/2008/186427.

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This manuscript discusses the application of a pulse-thermography modality to evaluate the integrity of a high-density polyethylene HDPE joint for delamination, in nonintrusive manner. The inspected HDPE structure is a twin-cup shape, molded through extrusion, and the inspection system comprises a high-intensity, short-duration radiation pulse to excite thermal emission; the text calibrates the experiment settings (pulse duration, and detector sampling rate) to accommodate HDPE bulks thermal response. The acquired thermal scans are processed through new contrast computation named “self-referen

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Retscher, Guenther, and Alexander Leb. "Development of a Smartphone-Based University Library Navigation and Information Service Employing Wi-Fi Location Fingerprinting." Sensors 21, no. 2 (2021): 432. http://dx.doi.org/10.3390/s21020432.

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A guidance and information service for a University library based on Wi-Fi signals using fingerprinting as chosen localization method is under development at TU Wien. After a thorough survey of suitable location technologies for the application it was decided to employ mainly Wi-Fi for localization. For that purpose, the availability, performance, and usability of Wi-Fi in selected areas of the library are analyzed in a first step. These tasks include the measurement of Wi-Fi received signal strengths (RSS) of the visible access points (APs) in different areas. The measurements were carried ou

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Retscher, Guenther, and Alexander Leb. "Development of a Smartphone-Based University Library Navigation and Information Service Employing Wi-Fi Location Fingerprinting." Sensors 21, no. 2 (2021): 432. http://dx.doi.org/10.3390/s21020432.

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A guidance and information service for a University library based on Wi-Fi signals using fingerprinting as chosen localization method is under development at TU Wien. After a thorough survey of suitable location technologies for the application it was decided to employ mainly Wi-Fi for localization. For that purpose, the availability, performance, and usability of Wi-Fi in selected areas of the library are analyzed in a first step. These tasks include the measurement of Wi-Fi received signal strengths (RSS) of the visible access points (APs) in different areas. The measurements were carried ou

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Yaqub, Maqsood, Ronald Boellaard, Bart NM van Berckel та ін. "Quantification of Dopamine Transporter Binding Using [18F]FP-β-CIT and Positron Emission Tomography". Journal of Cerebral Blood Flow & Metabolism 27, № 7 (2006): 1397–406. http://dx.doi.org/10.1038/sj.jcbfm.9600439.

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The purpose of this study was to compare different kinetic and semi-quantitative methods for analysing human [18F]FP-β-CIT studies: plasma input models, simplified (SRTM) and full (FRTM) reference tissue models, standard uptake values (SUV) and SUV ratios (SUVr). Both simulations and clinical evaluations were performed to determine the effects of noise, scan duration and blood volume on Akaike model selection, and on precision and accuracy of estimated parameters. For typical noise levels (COV ∼ 2.5%) and scan durations (< 90 mins), simulations provided poor fits (Akaike criterion) in case

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Nazir, Memona, Tahir Baig, Atif Hussain, Muhammad Tahir, Haider Ali, and Muhammad Nauman Akram. "Comparison of MRI and CT for Detection of Acute Cerebral Haemorrahge." Pakistan Journal of Medical and Health Sciences 15, no. 6 (2021): 1892–94. http://dx.doi.org/10.53350/pjmhs211561892.

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Objective: To compare the diagnostic accuracy of MRI and CT for detection of acute cerebral haemorrahge. Study Design: Comparative Study Place and Duration: Mohiuddin Islamic Teaching Hospital Mirpur AJK for period of six months from 1st August, 2020 to 31stJanuary, 2021. Methodology: A total of 20 patients of both genders with age of 25 years and onward with intracerebral hemorrhage who underwent MRI following CT in the first 6 hours of onset and last known well time and admission in stroke center were included in the study. The follow up time duration for both the scans was 24 hours to 48hou

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Farrokh, André, Harika Erdönmez, Fritz Schäfer, and Nicolai Maass. "SOFIA: A Novel Automated Breast Ultrasound System Used on Patients in the Prone Position: A Pilot Study on Lesion Detection in Comparison to Handheld Grayscale Ultrasound." Geburtshilfe und Frauenheilkunde 78, no. 05 (2018): 499–505. http://dx.doi.org/10.1055/a-0600-2279.

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Abstract Introduction Most of the currently available automated breast ultrasound systems require patients to be in the supine position. Previous data, however, show a high recall rate with this method due to artifacts. The novel automated breast ultrasound scanner SOFIA scans the breast with the patient in a prone position, resulting in even compression of breast tissue. We present our initial results with this examination method. Material and Methods 63 patients were analyzed using a handheld B-mode ultrasound. In cases of BI-RADS 1, 2 or 5, a SOFIA scan was performed. Sensitivity, specifici

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Ahmed, Umair, Malik Saeed Awan, Ghufran Ahmed, and Hafsa Asad. "Focused Assessment with Sonography for Trauma (FAST) Scan Versus Exploratory Laparotomy in Patients with Blunt Abdominal Trauma." Pakistan Armed Forces Medical Journal 72, no. 2 (2022): 576–79. http://dx.doi.org/10.51253/pafmj.v72i2.3780.

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Objective: To determine the diagnostic accuracy of FAST scans in patients with blunt abdominal trauma keeping exploratory laparotomy as a gold standard. Study Design: Cross-sectional validation study. Place and Duration of Study: Surgical Unit of Combined Military Hospital Kohat from Jan 2019 to June 2019. Methodology: Trauma patients reporting to the emergency department had a FAST scan using a portable ultrasound machine. The radiologist performed and interpreted the scans within one hour of the patient's arrival. The four standard views were obtained. Those who had positiv

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