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To compare imaging doses from MV images, kV radiographs, and kV-CBCT and describe methods to reduce the dose to patient’s organs using existing on-board imaging devices.Monte Carlo techniques were used to simulate kV X-ray sources. The kV image doses to a variety of patient anatomies were calculated by using the simulated realistic sources to deposit dose in patient CT images. For MV imaging, the...
This study explores methods to reduce dose due to kV-CBCT imaging for patients undergoing radiation therapy.Doses resulting from kV-CBCT scans were calculated using Monte Carlo techniques and were analyzed using dose–volume histograms. Patients were modeled as were CBCT acquisitions using both 360° and 200° gantry rotations. The effects of using the half fan bow-tie and the full fan bow-tie filters...
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