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(a, b) Graphs show correlation of ex vivo and image-based in vivo analysis of biodistribution of 111In-octreotide into MDA-MB-435 and L3.6pl tumors after in vivo adenoviral infection. Percentage of injected dose per gram (%ID/g) of excised tumors correlated with that derived from (a) planar and MR images (r = 0.87, n = 24, P < .001) or (b) SPECT and MR images (r = 0.84, n = 24, P < .001).
