title: Myocardial imaging with  13 NH 4+  and a multicrystal positron camera.
mesh_terms: D000818:Animals; D004285:Dogs; D009203:Myocardial Infarction / Q000175:diagnosis*; D009587:Nitrogen Isotopes; D000644:Quaternary Ammonium Compounds; D011877:Radionuclide Imaging / Q000295:instrumentation
chemical_list: D009587:Nitrogen Isotopes; D000644:Quaternary Ammonium Compounds