title: Yttrium-90 therapy and 99MTc pertechnetate knee uptake measurements in the management of rheumatoid arthritis.
abstract: Twenty-eight knees with chronic arthritis and effusion were treated with intra-articular 90Y. Synovial activity was assessed by measuring 99mTc pertechnetate uptake. There was a significant difference in uptake between controls and patients. Those who had a good response to 90Y (15 patients) showed a significant decrease in uptake, not seen in those who failed to respond. The pattern of 90Y distribution was examined and appeared to correspond to areas of increased synovial activity; these patterns and their significance have not been previously reported. Factors which could help to predict response to 90Y are discussed.
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000000981:diagnostic imaging / Q000378:metabolism / Q000532:radiotherapy*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011877:Radionuclide Imaging; D013670:Sodium Pertechnetate Tc 99m; D013585:Synovitis / Q000000981:diagnostic imaging / Q000378:metabolism / Q000532:radiotherapy*; D013667:Technetium; D015021:Yttrium Radioisotopes / Q000378:metabolism / Q000627:therapeutic use*
chemical_list: D015021:Yttrium Radioisotopes; D013667:Technetium; D013670:Sodium Pertechnetate Tc 99m