Advanced Brachytherapy Physics - Vienna 2016

CT

M t • os common y ava a e mag ng mo a y or rea men planning in radiation oncology  Relatively fast  3D (and 4D) by collection of 2D slices (partial volume)  Electronic density can be obtained (must be calibrated!)  Bone, air, bladder, rectum: OK  Excellent resolution in the transverse plane  Material maps possible for DE/ME-CT • Resolution limited along the scan axis: needle tips? • Not very good for soft tissue • Metal will produce artefacts • Large patients will create artefacts l il bl i i d lit f t t

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