Physics and instrumentation.
D001775:Blood Circulation; D002319:Cardiovascular System; D003201:Computers; D006334:Heart Function Tests / Q000295:instrumentation; D008433:Mathematics; D008863:Microspheres; D009683:Nuclear Medicine / Q000295:instrumentation; D055585:Physical Phenomena; D010825:Physics; D011877:Radionuclide Imaging / Q000295:instrumentation; D014054:Tomography / Q000295:instrumentation