Gammex/UTHSCSA Mark 2 phantom. (a) Design, (b) photograph, (c) US, (d) micro-CT and (e) T1 weighted MR images of the phantom are shown. Visualsonics US unit with 35 MHz frequency, Gamma-Medica Ideas micro-CT unit and clinical Philips 1.5 T MRI unit were used. Sphere distortion in US images and poor contrast in CT images show limitations of the phantom (red arrow).
Lee et al. BMC Medical Physics 2011 11:1 doi:10.1186/1756-6649-11-1