The introduction of nuclear medicine into oncology dates back to the early 1 940s, when Lawrence reported on the tumor retention of 32P-phosphate, von Hevesy and von Euler soon afterwards published their fundamental work on the metabolism of phosphorus in sarcoma cells, and when almost at the same time Keston and his coworkers de scribed their observation of the accumulation of radioactive iodine in metastases of a thyroid carcinoma. Since that time innumerable publi cations have appeared in oncologic literature which deal with the application of nuclear medical methods in experimental cancer...