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Patient‐specific QA and delivery verification of scanned ion beam at NIRS‐HIMAC
Medical Physics, 2013 Purpose:To evaluate a patient‐specific QA program and system for constancy checking of a scanning delivery system developed at the National Institute of Radiological Sciences.Methods:For the patient‐specific QA, all the planned beams are recalculated on a water phantom with treatment planning software (TPS).
Takuji, Furukawa +5 more
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A statistical approach to IMRT patient‐specific QA
Medical Physics, 2012Purpose: The intensity modulated radiation therapy (IMRT) patient‐specific quality assurance (QA) (referred to as QA in this paper for simplicity) process is a time and resource intensive effort in every clinic. The use of a global QA tolerance criterion for all treatment sites may be too tight for some complex sites increasing false negatives and ...
Geethpriya, Palaniswaamy +4 more
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On the use of trajectory log files for machine & patient specific QA
Biomedical Physics & Engineering Express, 2020Abstract Purpose: Trajectory log files are increasingly being utilized clinically for machine and patient specific QA. The process of converting the DICOM-RT plan to a deliverable trajectory by the linac control software introduces some uncertainty that is inherently incorporated into ...
Kai-Cheng Chuang +2 more
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On the use of biomathematical models in patient‐specific IMRT dose QA
Medical Physics, 2013Purpose:To investigate the use of biomathematical models such as tumor control probability (TCP) and normal tissue complication probability (NTCP) as new quality assurance (QA) metrics.Methods:Five different types of error (MLC transmission, MLC penumbra, MLC tongue and groove, machine output, and MLC position) were intentionally induced to 40 clinical
Heming, Zhen +2 more
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The effect of dose gradients on gamma comparison insensitivity in patient specific QA comparisons
Medical Physics, 2023AbstractBackgroundWhile many have speculated on the reasons for gamma comparison insensitivity for patient‐specific quality assurance analysis, the true reasons for insensitivity have not yet been elucidated. Failing to understand the reasons for this technique's insensitivity limits our ability to either improve the gamma metric to increase ...
Jennifer M, Steers, Benedick A, Fraass
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Patient-specific IMRT QA verification using machine learning and gamma radiomics
Physica Medica, 2021Gamma function is the standard methodology for comparing dose distributions. It is calculated in dedicated software, and its results verification is not performed. Thus we developed an automatic tool for patient-specific QA results verification through high accuracy machine learning (ML) models based on the radiomics characteristics extraction from ...
Jéssica Caroline, Lizar +4 more
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SU-GG-T-211: MapCHECK Patient Specific QA Cannot Suffice for MLC QA
Medical Physics, 2008Purpose: To demonstrate that MLC QA is an important aspect of an IMRT program, and cannot be substituted with patient specific QA using MapCHECK. Method and Materials: Two Elekta linacs in our clinic are currently being commissioned for IMRT from 3D conformal.
M Backer +4 more
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Validation of clearcalc for efficient patient specific QA
Medical DosimetryUganda's only radiotherapy center is a very busy facility treating about 210 patients daily on three linear accelerators making it sometimes hard to have machine time for pretreatment QAs. This study was aimed at validating an independent calculation software, ClearCalc (ICS) for second checks of the treatment planning system (TPS) calculations.
Ignatius Komakech +4 more
openaire +2 more sources