Results 51 to 60 of about 1,696,690 (363)
A small footprint couch‐top support device for image‐guided radiotherapy of heavy patients
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Purpose Patients with body weights close to or above 400 lbs present unique challenges in radiation therapy since the weight limit of most treatment couches decreases as the couch‐top extends toward the treatment gantry. The purpose of this work was to develop a small footprint couch‐top support platform to safely perform image‐guided ...
Huixiao Chen +5 more
wiley +1 more source
Radiation Oncology and Medical Physics [PDF]
BioMed Research International, 2015 Radiation therapy has been evolving with technological advances in accelerator, computer, and imaging. As the planning target volumes (PTVs) are made increasingly conformal with the advent of three-dimensional conformal therapy (3D CRT) and intensity-modulated radiation therapy (IMRT), the requirements of precise PTVs localization and its dosimetric ...
Tsair-Fwu Lee +5 more
openaire +2 more sources
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Background and purpose For postoperative breast cancer patients, deformable image registration (DIR) is challenged due to the large deformations and non‐correspondence caused by tumor resection and clip insertion. To deal with it, three metrics (fiducial‐, region‐, and intensity‐based) were jointly used in DIR algorithm for improved accuracy ...
Xin Xie +6 more
wiley +1 more source
South African pilot study: End-to-end radiotherapy and medical physics dosimetry audits
South African Journal of Oncology, 2019 Background: The National Metrology Institute of South Africa (NMISA), as an institute responsible for disseminating traceability, has embarked on establishing a national dosimetry audit programme with assistance from the International Atomic Energy ...
Humbulani V. Maselesele +3 more
doaj +1 more source
On Medical Device Software CE Compliance and Conformity Assessment [PDF]
arXiv, 2021 Manufacturing of medical devices is strictly controlled by authorities, and manufacturers must conform to the regulatory requirements of the region in which a medical device is being marketed for use. In general, these requirements make no difference between the physical device, embedded software running inside a physical device, or software that ...
arxiv
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Purpose MRI is increasingly used for brain and head and neck radiotherapy treatment planning due to its superior soft tissue contrast. Flexible array coils can be arranged to encompass treatment immobilization devices, which do not fit in diagnostic head/neck coils. Selecting a flexible coil arrangement to replace a diagnostic coil should rely
Evangelia Kaza +6 more
wiley +1 more source
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Purpose Treatment planning for head‐and‐neck (H&N) cancer, in particular oropharynx, nasopharynx, and paranasal sinus cases, at our center requires noncoplanar proton beams due to the complexity of the anatomy and target location. Targeting accuracy for all beams is carefully evaluated by using image guidance before delivering proton beam ...
Nrusingh C. Biswal +5 more
wiley +1 more source
Fear psychosis for the medical physicists' profession in the worldwide COVID-19 crisis
Current Medicine Research and Practice, 2021 Background: The coronavirus infectious disease 2019 (COVID-19) has spread over 213 countries around the world and two international conveyances. This has become a cause of public health emergencies as well as a crisis internationally.
Mahasin Gazi, Biplab Sarkar
doaj +1 more source
Image quality improvement in low‐dose chest CT with deep learning image reconstruction
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Objectives To investigate the clinical utility of deep learning image reconstruction (DLIR) for improving image quality in low‐dose chest CT in comparison with 40% adaptive statistical iterative reconstruction‐Veo (ASiR‐V40%) algorithm. Methods This retrospective study included 86 patients who underwent low‐dose CT for lung cancer screening ...
Qian Tian +7 more
wiley +1 more source
New Capabilities of the FLUKA Multi-Purpose Code
Frontiers in Physics, 2022 FLUKA is a general purpose Monte Carlo code able to describe the transport and interaction of any particle and nucleus type in complex geometries over an energy range extending from thermal neutrons to ultrarelativistic hadron collisions.
C. Ahdida +44 more
doaj +1 more source