Serial MIP images (patient 6) displayed at the same relative intensity. Although a slight decrease in blood pool is present, blood pool activity dominates the distribution. At 58, 109, and 189 minutes, the blood pool has a maximum standardized uptake value of 16.9, 13.6, and 9.8, respectively. There is slight increased uptake over time in the liver and kidneys. The patient had human epidermal growth factor 2 (HER2)-positive disease and was receiving lapatinib. Tumors in the left adrenal, hilar nodes, and bones were not visualized on Ga-PET. HER2, human epidermal growth factor receptor 2; MIP, maximum intensity projection; p.i, postinjection. (From Beyergil V, Morris PG, Smith-Jones PM, et al. Pilot study of 68Ga-DOTA-F(ab′)2-trastuzumab in patients with breast cancer. Nucl Med Commun 2013;34(12):1162; with permission.)