Fig. 1.
SPECT/CT images of a xenograft mouse bearingMDA-MB-231 at 1 hour post 99mTc-MDP administration. The distribution of the radiotracer was localized to bone, liver, bladder, and tumor with nearly zero activity in the muscle. The bone and bladder were masked using the CT images and superimposed on the SPECT images enhancing the visibility of the tumor radiotracer concentration.