Physical and Engineering Sciences in Medicine

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Fully automatic carotid arterial stiffness assessment from ultrasound videos based on machine learning
Physical and Engineering Sciences in Medicine - Tập 46 - Trang 151-164 - 2023
Diyar Ali Rasool, Haidar Jalal Ismail, Sardar Pirkhider Yaba
Arterial stiffness (AS) refers to the loss of arterial compliance and alterations in vessel wall properties. The study of local carotid stiffness (CS) is particularly important since carotid artery stiffening raises the risk of stroke, cognitive impairment, and dementia. So, stiffness measurement as a screening tool approach is crucial because it can reduce mortality and facilitate therapy plannin...... hiện toàn bộ
Accuracy of a time-of-flight (ToF) imaging system for monitoring deep-inspiration breath-hold radiotherapy (DIBH-RT) for left breast cancer patients
Physical and Engineering Sciences in Medicine - Tập 46 - Trang 339-352 - 2023
Auwal Abubakar, Shazril Imran Shaukat, Noor Khairiah A. Karim, Mohammed Zakir Kassim, Siew Yong Lim, Gokula Kumar Appalanaido, Hafiz Mohd Zin
Deep inspiration breath-hold radiotherapy (DIBH-RT) reduces cardiac dose by over 50%. However, poor breath-hold reproducibility could result in target miss which compromises the treatment success. This study aimed to benchmark the accuracy of a Time-of-Flight (ToF) imaging system for monitoring breath-hold during DIBH-RT. The accuracy of an Argos P330 3D ToF camera (Bluetechnix, Austria) was evalu...... hiện toàn bộ
Muscle and bone dose in paediatric limb digital radiography: a Monte Carlo evaluation
Physical and Engineering Sciences in Medicine - Tập 43 - Trang 79-92 - 2019
Yuri V. Matyagin, Donald W. McRobbie
The proliferation of digital radiography (DR) has led to a re-evaluation of exposure parameters and image quality. Currently, there is a move towards reducing X-ray tube voltage (kVp) in paediatric exposures down to 40 kVp to achieve better images. However, the effect on patient dose of these modifications is uncertain. The main aims of this phantom study were to evaluate the effect of reducing th...... hiện toàn bộ
Combined clustered scan-based metal artifact reduction algorithm (CCS-MAR) for ultrasound-guided cardiac radioablation
Physical and Engineering Sciences in Medicine - Tập 45 - Trang 1273-1287 - 2022
Sathyathas Puvanasunthararajah, Saskia M. Camps, Marie-Luise Wille, Davide Fontanarosa
Cardiac radioablation is a promising treatment for cardiac arrhythmias, but accurate dose delivery can be affected by heart motion. For this reason, real-time cardiac motion monitoring during radioablation is of paramount importance. Real-time ultrasound (US) guidance can be a solution. The US-guided cardiac radioablation workflow can be simplified by the simultaneous US and planning computed tomo...... hiện toàn bộ
Visualization of blurring process due to analog components in a digital radiography system using a simple method
Physical and Engineering Sciences in Medicine - Tập 43 - Trang 1461-1468 - 2020
Sho Maruyama
To obtain useful medical X-ray images for diagnosis, it is necessary to accurately evaluate the characteristics and fully understand the features of the system to determine the imaging target and conditions. This study describes the performance of a digital radiography (DR) system in detail and proposes a method for characterizing the blurring process due to the presence of analog components in an...... hiện toàn bộ
Winning images from the Art in Science and Engineering in Medicine (ARSENIC) competition
Physical and Engineering Sciences in Medicine - Tập 45 Số 1 - Trang 289-289 - 2022
Deriving optimal planning organ at risk volume margins in prostate external beam radiotherapy
Physical and Engineering Sciences in Medicine - Tập 44 - Trang 1071-1080 - 2021
Yutong Zhao, Martin A. Ebert, David Waterhouse, Simon Goodall, Pejman Rowshanfarzad, Shahin Fattahi
Planning organ-at-risk volume (PRV) margins can be applied to the bladder and rectum in prostate external beam radiation therapy (EBRT), in order to incorporate the uncertainties resulting from their inter-fraction motion. For each of a total of 16 patients, the bladder and rectum were delineated on CBCT images for five treatment fractions in addition to the planning CT image set. The bladder and ...... hiện toàn bộ
Commissioning measurements on an Elekta Unity MR-Linac
Physical and Engineering Sciences in Medicine - Tập 45 Số 2 - Trang 457-473 - 2022
Marcus Powers, John Baines, Robert K. Crane, Chantelle Fisher, S. M. Gibson, Linda Marsh, Bronwyn Oar, Ariadne Shoobridge, Emily Simpson‐Page, Marchant Van der Walt, Glenn de Vine
AbstractMagnetic resonance-guided radiotherapy technology is relatively new and commissioning publications, quality assurance (QA) protocols and commercial products are limited. This work provides guidance for implementation measurements that may be performed on the Elekta Unity MR-Linac (Elekta, Stockholm, Sweden). Adaptations of vendor supplied phantoms facilitat...... hiện toàn bộ
Distributed visual positioning for surgical instrument tracking
Physical and Engineering Sciences in Medicine - Tập 47 Số 1 - Trang 273-286 - 2024
Changyong Yu, Mingzhu Zhu, Bingwei He, Jianwei Zhang
Evaluation of the effect of sagging correction calibration errors in radiotherapy software on image matching
Physical and Engineering Sciences in Medicine - - 2024
Yumi Yamazawa, Akitane Osaka, Yasushi Fujii, Takahiro Nakayama, Kunio Nishioka, Yoshinori Tanabe
To investigate the impact of sagging correction calibration errors in radiotherapy software on image matching. Three software applications were used, with and without a polymethyl methacrylate rod supporting the ball bearings (BB). The calibration error for sagging correction across nine flex maps (FMs) was determined by shifting the BB positions along the Left–Right (LR), Gun–Target (GT), and Up–...... hiện toàn bộ
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