QUESTION: What is the recommended method to perform an output calibration with the MatriXX Resolution when used with a TomoTherapy or Radixact Accelator?
ANSWER:
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Scan MatriXX Resolution and miniPhantom R. Set the same kVp used in the Density model curve in Precision. The reconstructed image needs to be square (512 x512). The use of metal artifact reduction algorithm is recommended. The use of fiducials is recommended.
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Import the CT Scan to Precision TPS
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Create a region of 10x10 centered to the central chamber of MatriXX Resolution.
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Calculate a TomoHelical Plan. Modify the Machine and Optimization parameters as much as necessary to achieve a uniform dose distribution over the 10x10 region.
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Set the calculated dose in the central chamber of the MatriXX Resolution as the Median Dose reported for the 10x10 region. Verify maximum and minimum dose do not exceed 3% from the median dose.
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Export the planar dose (Coronal)