Advanced TP

Patient-Specific QC

Measured-Calculated Dose Agreement:

Prostate:

91.4% ± 4.1%

(25 patients, 175 beams)

(3%/2mm)

Spine SBRT:

77.1% ± 9.7%

(25 patients, 214 beams)

(3%/2mm)

MapCheck

Why the Difference in Agreement? Same Accelerator. Same Measurement Device. Beam Model?