A multi-institutional evaluation of machine performance check system on treatment beam output and symmetry using statistical process control

Journal of Applied Clinical Medical Physics
Diana BinnyScott B Crowe

Abstract

The automated and integrated machine performance check (MPC) tool was verified against independent detectors to evaluate its beam uniformity and output detection abilities to consider it suitable for daily quality assurance (QA). Measurements were carried out on six linear accelerators (each located at six individual sites) using clinically available photon and electron energies for a period up to 12 months (n = 350). Daily constancy checks on beam symmetry and output were compared against independent devices such as the SNC Daily QA 3, PTW Farmer ionization chamber, and SNC field size QA phantom. MPC uniformity detection of beam symmetry adjustments was also assessed. Sensitivity of symmetry and output measurements were assessed using statistical process control (SPC) methods to derive tolerances for daily machine QA and baseline resets to account for drifts in output readings. I-charts were used to evaluate systematic and nonsystematic trends to improve error detection capabilities based on calculated upper and lower control levels (UCL/LCL) derived using standard deviations from the mean dataset. This study investigated the vendor's method of uniformity detection. Calculated mean uniformity variations were within ± 0.5% of D...Continue Reading

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Oct 28, 2016·Australasian Physical & Engineering Sciences in Medicine·Diana BinnyScott B Crowe
Nov 15, 2016·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Diana BinnyScott B Crowe
Dec 9, 2016·Journal of Applied Clinical Medical Physics·Narges MiriPeter Greer
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Jun 15, 2017·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Diana BinnyScott B Crowe
Oct 29, 2017·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Diana BinnyScott B Crowe

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Citations

Jul 4, 2020·Reports of Practical Oncology and Radiotherapy : Journal of Greatpoland Cancer Center in Poznań and Polish Society of Radiation Oncology·Bipasha PalMonidipa Mondol
Mar 12, 2021·Physical and Engineering Sciences in Medicine·T AlandT Kairn
Nov 5, 2021·Journal of Radiation Research·Xiao-Li JinXiao-Fen Xing
Nov 12, 2021·Journal of Applied Clinical Medical Physics·Ashley J Cetnar, Dominic J DiCostanzo

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Methods Mentioned

BETA
electron
Profiler

Software Mentioned

MATLAB
SNC
IsoCal
SPC
MPC
SNC Machine

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Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)
Diana BinnyScott B Crowe
Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)
Diana BinnyScott B Crowe
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