Fig. 2

Example of CT usage during a Y90 procedure: The patient was a 90 year old female with a history of high-grade leiomyosarcoma of the gastric wall resected 3 years ago. A heterogeneous mass of 4.0 × 3.2 cm appeared in segment 7 on follow-up imaging (a) and the patient was referred to interventional radiology for SIRT Y90 treatment. A catheter- injected CT was performed from the proper hepatic artery, and anatomy was reviewed in reformatted views (b, c). A 3D model of the vessels was automatically generated and vessels were marked with potential MAA injection points (d, arrows), which were then overlaid on the fluoroscopy for guidance (e). An additional catheter-injected CT was performed from the desired location, which was then used to compute the tumor and perfused parenchyma volumes (f). The day of the Y90 treatment, registration of the same dataset using bony landmarks (g) was initially performed and the desired vessel was displayed for guidance (h)