FIGURE 3. SRS and ^99mTc-DTPA scintigraphy of SRS ON4 meningioma. (A) Planar somatostatin receptor scintigram 4 h after injection of 200 MBq ¹¹¹In-octreotide in anterior and posterior projection. R = right; L = left; V = ventral; D = dorsal. (B) Corresponding transverse SPECT slice at 4 h. (C) Transverse SPECT slice 1 h after injection of 600 MBq ^99mTc-DTPA.