Results 11 to 20 of about 51,447 (275)

Virtual patient-specific QA with DVH-based metrics. [PDF]

J Appl Clin Med Phys, 2022
AbstractWe demonstrate a virtual pretreatment patient‐specific QA (PSQA) procedure that is capable of quantifying dosimetric effect on patient anatomy for both intensity modulated radiotherapy (IMRT) and volumetric modulated arc therapy (VMAT). A machine learning prediction model was developed to use linear accelerator parameters derived from the DICOM‐
Lay LM, Chuang KC, Wu Y, Giles W, Adamson J.   +4 more
europepmc   +3 more sources

Evaluation of commercial devices for patient specific QA of stereotactic radiotherapy plans. [PDF]

J Appl Clin Med Phys, 2023
AbstractStereotactic radiotherapy (SRT) methods have become common for the treatment of small tumors in various parts of the body. Small field dosimetry has a unique set of challenges when it comes to the pre‐treatment validation of a radiotherapy plan that involves film dosimetry or high‐resolution detectors. Comparison of commercial quality assurance
James S, Al-Basheer A, Elder E, Huh C, Ackerman C, Barrett J, Hamilton R, Mostafaei F.   +7 more
europepmc   +3 more sources

Pixel response-based EPID dosimetry for patient specific QA. [PDF]

J Appl Clin Med Phys, 2017
AbstractIncreasing use of high dose rate, flattening filter free (FFF), and/or small‐sized field beams presents a significant challenge to the medical physics community. In this work, we develop a strategy of using a high spatial resolution and high frame rate amorphous silicon flat panel electronic portal imaging device (EPID) for dosimetric ...
Han B, Ding A, Lu M, Xing L.
europepmc   +3 more sources

Patient-Specific QA of Spot-Scanning Proton Beams using Radiochromic Film. [PDF]

Int J Med Phys Clin Eng Radiat Oncol, 2017
Radiochromic film for spot-scanning QA provides high spatial resolution and efficiency gains from one-shot irradiation for multiple depths. However, calibration can be a tedious procedure which may limit widespread use. Moreover, since there may be an energy dependence, which manifests as a depth dependence, this may require additional measurements for
Chan MF, Chen CC, Shi C, Li J, Tang X, Li X, Mah D.   +6 more
europepmc   +4 more sources

Patient Specific Pre-Treatment QA Verification Using an EPID Approach [PDF]

Technology in Cancer Research & Treatment, 2014
A software program [MU-EPID], has been developed to perform patient specific pre-treatment quality assurance (QA) verification for intensity modulated radiation therapy (IMRT) using fluence maps measured with an electronic portal imaging device (EPID).
Luis A, Vazquez Quino, Xiaoming, Chen, Mathew, Fitzpatrick, Chengyu, Shi, Sotirios, Stathakis, Alonso, Gutierrez, Carlos, Esquivel, Panayiotis, Mavroidis, Hassan, Alkhatib, Niko, Papanikolaou   +9 more
openaire   +2 more sources

Characterization of cylindrical ionization chambers for patient specific IMRT QA [PDF]

Journal of Applied Clinical Medical Physics, 2009
Proven conventional dosimetry techniques do not provide accuracy and precision in the measurement of inverse planned intensity‐modulated radiation therapy (IMRT) fields. Dynamic and step‐and‐shoot multileaf collimation (DMLC/SMLC) challenge current ionization chamber dosimetry practices.
Fraser, Danielle, Parker, William, Seuntjens, Jan   +2 more
openaire   +2 more sources

Institutional Patient-specific IMRT QA Does Not Predict Unacceptable Plan Delivery [PDF]

International Journal of Radiation Oncology*Biology*Physics, 2014
To determine whether in-house patient-specific intensity modulated radiation therapy quality assurance (IMRT QA) results predict Imaging and Radiation Oncology Core (IROC)-Houston phantom results.IROC Houston's IMRT head and neck phantoms have been irradiated by numerous institutions as part of clinical trial credentialing.
Kry, Stephen F, Molineu, Andrea, Kerns, James R., Faught, Austin M., Huang, Jessie Y., Pulliam, Kiley B., Tonigan, Jackie, Alvarez, Paola, STINGO, FRANCESCO CLAUDIO, Followill, David S.   +9 more
openaire   +3 more sources

Deep Hybrid Learning Prediction of Patient-Specific Quality Assurance in Radiotherapy: Implementation in Clinical Routine

Diagnostics, 2023
Background: Arc therapy allows for better dose deposition conformation, but the radiotherapy plans (RT plans) are more complex, requiring patient-specific pre-treatment quality assurance (QA). In turn, pre-treatment QA adds to the workload. The objective
Noémie Moreau, Laurine Bonnor, Cyril Jaudet, Laetitia Lechippey, Nadia Falzone, Alain Batalla, Cindy Bertaut, Aurélien Corroyer-Dulmont   +7 more
doaj   +1 more source

A virtual phantom for patient-specific QA On A 1.5T MR-linac. [PDF]

J Appl Clin Med Phys
AbstractCreate a virtual ArcCHECK‐MR phantom, customized for a 1.5T MR‐linac, with consideration of the different density regions within the quality assurance (QA) phantom, aiming to streamline the utilization of this specialized QA device. A virtual phantom was constructed in the treatment planning system (TPS) to replicate the ArcCHECK‐MR's ...
Ji M, Li Z, Tian Y, Zhang K, Li M, Chen Y.   +5 more
europepmc   +3 more sources

Patient-specific independent 3D GammaPlan quality assurance for Gamma Knife Perfexion radiosurgery [PDF]

, 2013
One of the most important aspects of quality assurance (QA) in radiation therapy is redundancy of patient treatment dose calculation. This work is focused on the patient-specific time and 3D dose treatment plan verification for stereotactic radiosurgery ...
Best, Best, Bhatnagar, Cho, Daniel A. Low, Ma, Maria Mamalui-Hunter, Novotony, Robert E. Drzymala, Sasa Mutic, Sridhar Yaddanapudi, Tianyu Zhao, Wright   +12 more
core   +2 more sources