 For the biodistribution, the 3D regions of interest ROIs will be drawn about each major organ that is identified on the whole body scans. This will be performed on each of the whole body scans and a time activity curve will be generated. The residence time for each organ will be determined. The blood data will be pipetted and counted for estimates of activity in the blood and bone marrow. For the brain andor spine images, the PET data will be registered to the subjects MRI. The PET scan will be graded on a subjective 4-point scale. 3D ROIs will be drawn around the tumor. In addition, an analogous ROI will be drawn in normal brain background and about the whole brain for comparison. For the tumor, tumor-to-background, tumor-to-whole brain ratios will be determined. In addition, standard uptake values SUVs will be determined for the tumor and background. 