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Performance testing – ex. Accuracy of configuration data-

volume averaging

IMRT plan

TPS

Planar

fluence

prediction

High resolution 2D array

measurements

MapCheck (Sun Nuclear)

Gamma analysis (3%-3mm)

User:

Configuration data

(measurements);

tunning of conf.

parameters

Vendor:

Beam

modeling-

dose

calculation

algorithms

User:

Configuration data

3 beam models

Three beam models

(profiles)

6mm diameter ion chamber

4mm diameter ion chamber

True profiles (analytic

fitting/deconvolution)

Guanghya Yan et al. Med Phys 35(8) 2008