13 Ken Javedan-IMRT with decimal solid modulators - small.pdf

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13 Ken Javedan-IMRT with decimal solid modulators - small.pdf

Why CB-IMRT?• Delivery of large IMRT fields with MLC is limited by• MLC design (14)• For example the Siemens Oncor machine with the 82 leafOptifocus MLC system allows:• Maximum IMRT field size of 22x40 cm 2X carriage travel limit is 10 cm passed the CAXMaximum conformal field size = 40x40 cm 2– ( desirable for large field CB-IMRT with MLC blocking)16

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