Results 21 to 30 of about 25,193 (285)

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

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   +1 more source

The Effect of Total Fields' Area and Dose Distribution in Step and Shoot IMRT on Gamma Passing Rate Using OCTAVIUS 4D-1500 Detector Phantom [PDF]

Iranian Journal of Medical Physics, 2021
Introduction: Quality assurance is necessary for every IMRT plan.‎Octavius 4D-1500 detector phantom is ‎one of the new phantoms for ‎determining the treatment plan quality‎.‎ This study aimed to examine the IMRT plans using the ‎Octavius 4D-1500‎‏ ‏‎to ...
Abdulrahman Abdulbaqi, Siham Abdullah, Haydar Alabedi, nabaa alazawy, Mustafa Al-Musawi, Ahmed Heydar   +5 more
doaj   +1 more source

Does fluence smoothing reduce the complexity of the intensity-modulated radiation therapy treatment plan? A dosimetric analysis

Journal of Medical Physics, 2022
Background: Intensity-modulated radiation therapy (IMRT) may have too many peaks and valleys, making the treatment plan undeliverable. When there are too many fluency differences between adjacent pixels in the X or Y directions, the X and Y smoothing ...
Dinesh Kumar Saroj, Suresh Yadav, Neetu Paliwal   +2 more
doaj   +1 more source

Dosimetric Comparison between Dynamic Wave Arc and Co-Planar Volumetric Modulated Radiotherapy for Locally Advanced Pancreatic Cancer [PDF]

Iranian Journal of Medical Physics, 2022
Introduction: Dose reduction to the duodenum is important to decrease gastrointestinal toxicities in patients with locally advanced pancreatic cancer (LAPC) treated with definitive chemoradiotherapy.
Alshaymaa Abdelghaffar, Noriko Kishi, Ryo Ashida, Yukinori Matsuo, Hideaki Hirashima, Nobutaka Mukumoto, Michio Yoshimura, Mitsuhiro Nakamura, Ahmed El Sayed Mohamed, Elsayed Mostafa, Mohamed Soliman Gaber, Takashi Mizowaki   +11 more
doaj   +1 more source

A Beam Projection-Based Modified Gamma Analysis Scheme for Clinically Interpretable Pre-Treatment Dose Verification

Dose-Response, 2021
Purpose: To investigate a novel gamma analysis system for dose verification results in terms of clinical significance. Methods and Materials: The modified scheme redefined the computational domain of the conventional gamma analysis with the projections ...
Yiling Wang, Gang Yin, Jie Wang, Yue Zhao, Min Liu, Jinyi Lang   +5 more
doaj   +1 more source

Predicting Gamma Passing Rates for Portal Dosimetry-Based IMRT QA Using Deep Learning [PDF]

International Journal of Radiation Oncology*Biology*Physics, 2021
Purpose/Objective(s) To assess if portal dosimetry-based IMRT QA gamma passing rates can be predicted with a Convolutional Neural Network (CNN) Model trained directly on the fluence maps without any domain expert knowledge. Materials/Methods A total of 4268 beams were collected from various treatment site plans and analyzed using gamma criteria of
D.M. Fondevila, P.J. Rios, D.M. Dodat Peñalva, S. Arbiser   +3 more
openaire   +1 more source

Evaluation of Delta Anatomy in 3D Patient-Specific IMRT Quality Assurance

Technology in Cancer Research & Treatment, 2020
Purpose: To evaluate the performance of Delta 4DVH Anatomy in patient-specific intensity-modulated radiotherapy quality assurance. Materials and Methods: Dose comparisons were performed between Anatomy doses calculated with treatment plan dose measured ...
Du Tang PhD, Zhen Yang MS, Xunzhang Dai MM, Ying Cao MS   +3 more
doaj   +1 more source

Comparative analysis of dose verification between computed tomography scan phantom and virtual digital phantom of Delta4

Precision Radiation Oncology, 2020
Objective This study compared the dose verification results between plans created based on computed tomography (CT) scan and digital virtual phantom. Methods We retrospectively analyzed the treatment plan of 10 patients with head and neck cancer.
Ting‐Ting Liu, Zhi‐Tao Dai, Kai‐Lian Kang, Li‐Ying Gao, Rui‐Feng Liu, Shui‐Gen Ou‐Yang   +5 more
doaj   +1 more source

Analysis of plan parameters affecting the delivery quality assurance passing rate of the Tomo direct method in Radixact X9

, 2021
Delivery quality assurance (DQA) is the process of establishing a treatment plan and verifying that the pre-treatment dose is delivered without any problems through a simulation.
Kang, YN, Kim, J, Lee, J, Jang, HS, Seol, Y, Kim, SH, Choi, BO, Oh, T, Hong, JY   +8 more
core   +1 more source

Clinical performance of FractionLab in patient-specific quality assurance for intensity-modulated radiotherapy: a retrospective study [PDF]

Journal of Yeungnam Medical Science, 2022
Background This study was aimed at comparing and analyzing the results of FractionLab (Varian/Mobius Medical System) with those of portal dosimetry that uses an electronic portal imaging device.
Se An Oh, Sung Yeop Kim, Jaehyeon Park, Jae Won Park, Ji Woon Yea   +4 more
doaj   +1 more source