Deformable registration of 4DCT data for ion beam therapy of moving tumors*
نویسندگان
چکیده
For radiotherapy with ion beams precise information of the patient's internal anatomy is required. For moving organs such as lung or liver, time-resolved (4D) computed tomography (CT) can be applied to extract anatomical changes due to respiration of a patient. A 4DCT data set consists of several 3-dimensional (3D) CT volumes (typically 10), and each volume corresponds to the anatomical 3D image at a motion phase of the breathing cycle. By comparing two image volumes in a 4DCT set, internal motion including organ deformation can be extracted and used to register one volume to the other. In this report, the quality assessment of the performed deformable registration at GSI is presented.
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