Results 11 to 20 of about 282,169 (295)

A Time-Series Approach for Machine Learning-Based Patient-Specific Quality Assurance of Radiosurgery Plans [PDF]

Bioengineering
Stereotactic radiosurgery (SRS) for multiple brain metastases can be delivered with a single isocenter and non-coplanar arcs, achieving highly conformal dose distributions at the cost of extreme modulation of treatment machine parameters.
Simone Buzzi, Pietro Mancosu, Andrea Bresolin, Pasqualina Gallo, Francesco La Fauci, Francesca Lobefalo, Lucia Paganini, Marco Pelizzoli, Giacomo Reggiori, Ciro Franzese, Stefano Tomatis, Marta Scorsetti, Cristina Lenardi, Nicola Lambri   +13 more
doaj   +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

Feasibility study of structural similarity index for patient-specific quality assurance. [PDF]

J Appl Clin Med Phys
AbstractBackgroundThe traditional gamma evaluation method combines dose difference (DD) and distance‐to‐agreement (DTA) to assess the agreement between two dose distributions. However, while gamma evaluation can identify the location of errors, it does not provide information about the type of errors.PurposeThe purpose of this study is to optimize and ...
Lee JC, Park HW, Kang YN.
europepmc   +3 more sources

Therapeutic dose prediction using score-based diffusion model for pretreatment patient-specific quality assurance [PDF]

Frontiers in Oncology
ObjectivesImplementing pre-treatment patient-specific quality assurance (prePSQA) for cancer patients is a necessary but time-consuming task, imposing a significant workload on medical physicists.
Xiuwen Yu, Jiabin Lin, Changfei Gong, Minhui Zhang, Xianyu Luo, Qiegen Liu, Yun Zhang   +6 more
doaj   +2 more sources

Evaluation of 2D ion chamber arrays for patient specific quality assurance using a static phantom at a 0.35 T MR-Linac [PDF]

Zeitschrift für Medizinische Physik
Introduction: Patient specific quality assurance (QA) in MR-Linacs can be performed with MR-compatible ion chamber arrays. However, the presence of a static magnetic field can alter the angular response of such arrays substantially.
C. Katharina Renkamp, Daniela Eulenstein, Moritz Sebald, Fabian Schlüter, Carolin Buchele, Carolin Rippke, Jürgen P. Debus, Sebastian Klüter   +7 more
doaj   +2 more sources

Prediction of three-dimensional dose distribution for patient-specific quality assurance based on log files using WingsNet [PDF]

Radiation Oncology
Background This study aims to construct and train the WingsNet model, which leverages the parameters recorded in log files to rapidly and accurately predict the patient-specific three-dimensional (3D) dose distribution for IMRT quality assurance (QA ...
Ying Huang, Yifei Pi, Ruxin Cai, Kui Ma, Hao Wang, Hua Chen, Hengle Gu, Yan Shao, Aihui Feng, Yanhua Duan, Zhenjiong Shen, Qing Kong, Zhiyong Xu, Weihai Zhuo   +13 more
doaj   +2 more sources

Automated Patient-specific Quality Assurance for Automated Segmentation of Organs at Risk in Nasopharyngeal Carcinoma Radiotherapy [PDF]

Cancer Control
Introduction Precision radiotherapy relies on accurate segmentation of tumor targets and organs at risk (OARs). Clinicians manually review automatically delineated structures on a case-by-case basis, a time-consuming process dependent on reviewer ...
Yixuan Wang MD, Jiang Hu MD, Lixin Chen PhD, Dandan Zhang PhD, Jinhan Zhu PhD   +4 more
doaj   +2 more sources

Statistical Process Control in Monitoring Radiotherapy Quality Assurance Program: An Institutional Experience. [PDF]

Iranian Journal of Medical Physics, 2022
Introduction: Statistical process control (SPC) is a handy and powerful tool for monitoring quality assurance (QA) programs in radiotherapy. This study explains the institutional experience in monitoring weekly output constancy QA and patient-specific ...
Vysakh R, R Ganapathi Raman, P Niyas, P Aflah   +3 more
doaj   +1 more source

Suitability Assessment of an Indigenous Heterogeneous Thoracic Phantom for Patient-Specific Quality Assurance in Radiotherapy [PDF]

Iranian Journal of Medical Physics, 2022
Introduction: Patient-specific quality assurance (PSQA) assumes a vital role in precise and accurate radiation delivery to cancer patients. Since the patient body comprises heterogeneous media, the present study aimed to fabricate a heterogeneous ...
Vinod Gangwar, Avinash Agarwal, Om Prakash Gurjar, Lalit Kumar, Vineet Kumar Mishra, Surendra Mishra   +5 more
doaj   +1 more source

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

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   +1 more source