title: An instrument for checking the radioactivity in shielded syringes.
abstract: A description is given of an instrument that can be used for checking, to within ten percent, the radioactivity in shielded syringes. The unit is simple in design and construction and easy to use. The lead shield of the syringe does not have to be removed, since only radiation emitted along the direction of the barrel is detected. A range of syringe sizes can be accommodated and, whilst the instrument is calibrated for 99Tcm with activities in the range 1-10 mCi, both higher and lower activities and other radionuclides can be used. Each measurement takes only a few seconds and the activity of radiopharmaceuticals can be routinely checked immediately before injection.
mesh_terms: D011874:Radiometry / Q000295:instrumentation*; D013594:Syringes; D013667:Technetium / Q000008:administration & dosage
chemical_list: D013667:Technetium