Results 1 to 10 of about 8,057,312 (144)

Clinical rationale for in vivo portal dosimetry in magnetic resonance guided online adaptive radiotherapy [PDF]

Physics and Imaging in Radiation Oncology, 2022
Background and purpose: In magnetic resonance guided online adaptive radiotherapy, the patient model used for plan adaptation and dose calculation is created online under stringent time constraints.
Begoña Vivas Maiques, Igor Olaciregui Ruiz, Tomas Janssen, Anton Mans   +3 more
doaj   +2 more sources

Prediction of portal dosimetry quality assurance results using log files-derived errors and machine learning techniques [PDF]

Frontiers in Oncology, 2023
ObjectiveThis work aims to use machine learning models to predict gamma passing rate of portal dosimetry quality assurance with log file derived features.
Kah Seng Lew, Clifford Ghee Ann Chua, Calvin Wei Yang Koh, James Cheow Lei Lee, Sung Yong Park, Sung Yong Park, Hong Qi Tan   +6 more
doaj   +2 more sources

Importance of beam-matching between truebeam stx and novalis tx in pre-treatment quality assurance using portal dosimetry [PDF]

Journal of Medical Physics, 2021
Flexibility and efficiency in a radiotherapy department with different linear accelerators (linacs) can be improved if they are dosimetrically equivalent, and there is no need of plan or patient-specific quality assurance (PSQA) modification.
José Alejandro Rojas-López, Daniel Venencia   +1 more
doaj   +2 more sources

Multi-parametric Improvements in the CCD Camera-based EPID for Portal Dosimetry [PDF]

Journal of Medical Signals and Sensors, 2017
Dosimetric verification of radiation treatment has recently been extended by the introduction of electronic portal imaging devices (EPIDs). Detailed dose response specifications of EPID should be addressed prior to any dosimetric application. The present
Vahideh Nazari, Seied R Mahdavi, Ahmad Mostaar, Hassan Nedaei, Mohammad A Mosleh Shirazi, Alireza Nikoofar, Golbarg Esmailie   +6 more
doaj   +2 more sources

Task-based image quality and dosimetric validation of HyperSight CBCT for adaptive radiotherapy. [PDF]

J Appl Clin Med Phys
Abstract Background Cone‐beam computed tomography (CBCT) is increasingly used in adaptive radiotherapy (ART), yet the dosimetric accuracy and image quality of advanced CBCT imaging platforms—such as Halcyon HyperSight 4.0 (HH), which combines an upgraded detector panel with advanced iterative reconstruction, scatter‐correction, and metal‐artifact ...
Park B, Kim T, Lee KW.
europepmc   +2 more sources

Automatic single-isocenter multiple-target cranial stereotactic treatment plan optimization via planning system scripting. [PDF]

J Appl Clin Med Phys
Abstract Background Single‐isocenter multiple‐target stereotactic radiation treatments delivered on C‐arm linear accelerators are increasingly common due to practical advantages in both accessibility and speed compared to multiple isocenter treatments.
Dekker KH, Everaars JA.
europepmc   +2 more sources

Preclinical feasibility of EPID-based transit dosimetry for total body irradiation. [PDF]

J Appl Clin Med Phys
Abstract Background Conventional extended‐distance total body irradiation (TBI) is commonly verified using point dosimeters, which provide limited spatial information and require additional handling during a prolonged treatment procedure. A portable charge‐coupled device (CCD)‐based electronic portal imaging device (EPID) positioned downstream of the ...
Nakaichi T, Okamoto H, Kon M, Takaso K, Aikawa A, Nakamura S, Iijima K, Chiba T, Nakayama H, Goka T, Igaki H.   +10 more
europepmc   +2 more sources

Evaluation of EPID-Based Transmission and DLG Correction Methods for Dosimetric Verification in HyperArc Single-Isocenter Multiple Target Radiosurgery [PDF]

Diagnostics
Background/Objectives: Accurate verification of single-isocenter multiple-target (SIMT) stereotactic radiosurgery is challenging owing to the complexity of multi-lesion delivery and the sensitivity of stereotactic dose gradients. We aimed to evaluate the
Se An Oh, Sung Yeop Kim, Jae Won Park, Ji Woon Yea, Jaehyeon Park, Yoon Young Jo   +5 more
doaj   +2 more sources

Current Practices and Clinical Implementation of Electronic Portal Imaging Device-based Dosimetry in Indian Radiotherapy Centres: A National Survey [PDF]

Journal of Medical Physics
Purpose: This study aims to assess the current prevalence, utilization patterns, and operational challenges of electronic portal imaging device (EPID)-based dosimetry systems in Indian radiotherapy centres. Materials and Methods: A multiple-choice survey
Raghavendra Hajare, Rohit Avinash Vadgaonkar, Shanmukhappa B. Kaginelli, Man Gobinda Chowdhury, Debasish Sahoo, Shrikant Kale, Ravi Teja Miriyala, Umesh Mahantshetty   +7 more
doaj   +2 more sources

The future of brachytherapy physics: Innovation, quality, and the next generation of clinical practice. [PDF]

J Appl Clin Med Phys
Journal of Applied Clinical Medical Physics, Volume 27, Issue 10, October 2026.
Kovalchuk N, Carlsson Tedgren Å, Siebert FA, Rivard MJ, Rink A, Rong Y.   +5 more
europepmc   +2 more sources