Figure 1.

Gammex/UTHSCSA Mark 1 phantom. (a) Design, (b) photograph, (c) image caliper, volume, diameter and diameter depth dependence of US images, (d) CT and (e) T1 weighted MR images of the phantom are displayed. Visualsonics US unit with 35 MHz frequency, clinical Philips CT and clinical Philips 3T MRI units were used. The size of the phantom was too large to fit into the bore of all preclinical CT and MR scanners.