Dose Course 2018_Flipping book

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1st Commandment Explained

❑ Metric for γ-analysis

o “Overreliance on the insensitive metric is ❖ counterproductive to quality improvement and ❖ can lead to the sense of complacency among the clinical physicists.”

o “IMRT and VMAT commissioning, along with product validation, would benefit from the retirement of the 3%/3 mm passing rates as a primary metric of performance, and ❖ the adoption instead of tighter tolerances, more diligent diagnostics, and more thorough analysis.”

Med Phys 2013 – Nelms et al

Dublin 2018