Bland and Altman analysis: Machine performance check output
Genesiscare, Radiation Oncology Modesto, California, USA.
Research Article
International Journal of Scientific Research Updates, 2023, 05(02), 069–075.
Article DOI: 10.53430/ijsru.2023.5.2.0046
Publication history:
Received on 24 April 2023; revised on 06 June 2023; accepted on 09 June 2023
Abstract:
Background: The aim of this study was to evaluate the variation in the daily output of a linac Varian Edge TrueBeam over a month, using a Daily QA3 (QA3) and machine performance check (MPC), after Task Group 51protocol and baseline data had been established.
Methods and Materials: The daily output data were collected for all photons (6, 10 MV, and 6, 10 FFF) and electrons (6, 9, 12, and 15 MeV) energies. A Bland-Altman-Plot and intraclass correlation coefficients were used to assess agreement and reliability.
Results: MPC data showed small random deviations of ≤ 2% and agreed with the QA3 measurements. The maximum mean absolute difference between the QA3 and MPC data was observed with 6 MeV (0.5633), with limits of agreement of (−0.5392–1.6658).
Conclusion: These results suggest that MPC data closely track QA3 data and that the two forms are interchangeable.
Keywords:
Machine performance check (MPC); Bland-Altman method Daily QA3
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