Cohorts of 3 will be treated each at different dose levels and images will be taken at 4 time points. For dosimetry estimates, there will be a 20-24 hr time point post-administration of 99mTc-GP for the first 3 patients. If the biodistribution and dosimetry can be adequately quantified without the 20-24 hr scan in 3 patients, then we will eliminate that 4th scan for all other patients. Urine and blood samples will be collected at 5 time points, and an additional blood and urine sample will be collected for dosimetry analysis at 30\~60 min.
