Results 31 to 40 of about 85,512 (248)

Analysis of dose comparison techniques for patient‐specific quality assurance in radiation therapy [PDF]

Journal of Applied Clinical Medical Physics, 2019
AbstractPurposeGamma evaluation is the most commonly used technique for comparison of dose distributions for patient‐specific pretreatment quality assurance in radiation therapy. Alternative dose comparison techniques have been developed but not widely implemented. This study aimed to compare and evaluate the performance of several previously published
Yu, Liting, Tang, Timothy L. S., Cassim, Naasiha, Livingstone, Alexander, Cassidy, Darren, Kairn, Tanya, Crowe, Scott B.   +6 more
openaire   +5 more sources

4089 Clinical Implementation of Monte Carlo Dose Calculation for Patient-Specific Radiotherapy Quality Assurance

Journal of Clinical and Translational Science, 2020
OBJECTIVES/GOALS: The Monte Carlo dose calculation method is often considered the “gold standard” for patient dose calculations and can be as radiation dose measurements.
Holly Marie Parenica, Christopher Kabat, Pamela Myers, Neil Kirby, Pavlos Papaconstadopoulos, Nikos Papanikolaou, Sotirios Stathakis   +6 more
doaj   +1 more source

Treatment plan prescreening for patient-specific quality assurance measurements using independent Monte Carlo dose calculations

Frontiers in Oncology, 2022
PurposeThis study proposes a method to identify plans that failed patient-specific quality assurance (QA) and attempts to establish a criterion to prescreen treatment plans for patient-specific QA measurements with independent Monte Carlo dose ...
Yuan Xu, Ke Zhang, Zhiqiang Liu, Bin Liang, Xiangyu Ma, Wenting Ren, Kuo Men, Jianrong Dai   +7 more
doaj   +1 more source

Development of Dosimetric Verification System for Patient-Specific Quality Assurance of High-Dose-Rate Brachytherapy

Frontiers in Oncology, 2021
Purpose: The aim of this study was to develop a dosimetric verification system (DVS) using a solid phantom for patient-specific quality assurance (QA) of high-dose-rate brachytherapy (HDR-BT).Methods: The proposed DVS consists of three parts: dose ...
Sang-Won Kang, Sang-Won Kang, Jin-Beom Chung, Kyeong-Hyeon Kim, Kyeong-Hyeon Kim, Chang Heon Choi, Seonghee Kang, Dong-Seok Shin, Dong-Seok Shin, Woong Cho, Kuen-Yong Eom, Hae-Jin Park, Jin-Young Kim, Changhoon Song, In Ah Kim, Jae-Sung Kim, Tae Suk Suh, Tae Suk Suh, Justin C. Park   +18 more
doaj   +1 more source

Evaluation of a two‐dimensional diode array for patient‐specific quality assurance of HyperArc [PDF]

Journal of Applied Clinical Medical Physics, 2021
AbstractPurposeTo evaluate a two‐dimensional diode array for patient‐specific quality assurance of VMAT stereotactic radiosurgery (SRS) plans.MethodsThe diode array, an SRS MapCHECK (SRSMC), was composed of a 77 mm ×77 mm face‐centered array having a spacing of 2.47 mm.
Richard A. Popple, Rodney J. Sullivan, Yuan Yuan, Xingen Wu, Elizabeth L. Covington   +4 more
openaire   +2 more sources

Patient-specific quality assurance of dynamically-collimated proton therapy treatment plans. [PDF]

Med Phys
AbstractBackgroundThe dynamic collimation system (DCS) provides energy layer‐specific collimation for pencil beam scanning (PBS) proton therapy using two pairs of orthogonal nickel trimmer blades. While excellent measurement‐to‐calculation agreement has been demonstrated for simple cube‐shaped DCS‐trimmed dose distributions, no comparison of ...
Bennett LC, Hyer DE, Vu J, Patwardhan K, Erhart K, Gutierrez AN, Pons E, Jensen E, Ubau M, Zapata J, Wroe A, Wake K, Nelson NP, Culberson WS, Smith BR, Hill PM, Flynn RT.   +16 more
europepmc   +3 more sources

Clinical evaluation of an anatomy‐based patient specific quality assurance system

Journal of Applied Clinical Medical Physics, 2014
The Delta4DVH Anatomy 3D quality assurance (QA) system (ScandiDos), which converts the measured detector dose into the dose distribution in the patient geometry was evaluated. It allows a direct comparison of the calculated 3D dose with the measured back‐projected dose.
Hauri, P, Verlaan, S, Graydon, S, Ahnen, L, Klöck, S, Lang, S   +5 more
openaire   +4 more sources

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

Serological Benefit of SARS‐CoV‐2 Vaccination Relative to Infection in Children With Acute Lymphoblastic Leukemia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Children with acute lymphoblastic leukemia (ALL) are at risk of severe outcomes from SARS‐CoV‐2 (SCV2). In the post‐pandemic context, where most children have been infected with SCV2, there are limited data on whether vaccination remains beneficial in children with ALL.
Janna R. Shapiro, Freda Qi, Karen Colwill, Alina D. Dorogy, Ying Liu, Michelle Science, Anne‐Claude Gingras, James M. Rini, Sumit Gupta, Sarah Alexander, Shelly Bolotin, Tania H. Watts   +11 more
wiley   +1 more source

Highly efficient and sensitive patient-specific quality assurance for spot-scanned proton therapy.

PLoS ONE, 2019
The purpose of this work was to develop an end-to-end patient-specific quality assurance (QA) technique for spot-scanned proton therapy that is more sensitive and efficient than traditional approaches.
J E Johnson, C Beltran, H Wan Chan Tseung, D W Mundy, J J Kruse, T J Whitaker, M G Herman, K M Furutani   +7 more
doaj   +1 more source