Figure 4

US, CT, and MR imaging results of the Vienna/ring-and-tandem phantom. (a) Axial view of the registered and fused 3D TAUS and 3D TRUS images. The bladder, uterus, and rectal canal are visible, along with the tandem, tandem shadowing, and needle tips. Reflections of the phantom box contents appear outside of the hyperechoic box outline. (b) Axial view of a 3D TAUS image that localizes the tumor. (c) Sagittal view of a 3D TRUS image, which demonstrates the visibility of the tandem and rectal canal. Tandem shadowing is also apparent above the tandem. (d) Sagittal view of the CT image, with visualization of the applicator and needles. (e) Coronal view of the MR image, which includes relevant anatomy and applicator placement.