270 / 1228
CT
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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
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Resolution limited along the scan axis: needle tips?
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Not very good for soft tissue
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Metal will produce artefacts
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Large patients will create artefacts