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Integration of TRUS-based prostate volume into postoperative CT images. (a1)–(a3) are TRUS images in axial, coronal, and sagittal directions; (b1)–(b3) are the postoperative CT; (c1)–(c3) are the postregistration TRUS images; (d1)–(d3) are the TRUS–CT fusion images, where the prostate volume is integrated. The close match between the gold markers (arrows) in the TRUS and CT demonstrates the accuracy of our method.
