Detection of cerebral metastases by radionuclide dynamic and static images: recent experiences

Using a gamma camera and image processing, 140 patients with known cerebral metastases had static images obtained after i.v. 99mTc-(Sn)-DTPA. Of these, 94.3% showed one or more lesions. A total of 120 of the patients had cerebral dynamic studies. Only 55.8% of these had abnormalities on the dynamic sequence. These values are not too dissimilar from prior studies using older equipment. The results suggest the need for additional radiopharmaceuticals for following cerebral dynamic and static events, since more recent equipment has not shown a major increase in detection.