Acronyms Acronym Definition SSS  summed stress score  RVG  radionuclide ventriculography  ROI  region of interest  RNA  radionuclide angiography  RAD  roentgen absorbed dose  PIOPED  prospective investigation of pulmonary embolism diagnosis  PIB  Pittsburgh compound B (2-[4´-(methylamino)phenyl]-6-hydrobenzothiazole)  PET  positron emission tomography  OIH  orthoiodohippurate  OEF  oxygen extraction fraction  MUGA  multigated acquisition  MRglc  glucose metabolic rate  MMSE  mini-mental state examination  MIBI  methoxy isobutyl isonitrile  MIBG  meta-iodobenzylguanidine  mHED  carbon-11 metahydroxyephedrine  MHDP  methylene hydroxydiphosphonate  MET  carbon-11 methionine  MDP  methylene diphosphonate  MCI  mild cognitive impairment  MAG3  mercaptylacetyltriglycine  LHR  lung heart ratio  L-ECD  ethylene dicysteine diethyl ester  IT  isomeric transitions  IMP  isopropyliodoamphetamine  HPLC  high-performance liquid chromatography  HMPAO  hexamethylpropyleneamine oxime  HED  carbon-11 hydroxyephedrine  HDP  hydroxymethan diphosphonate  HAS  human serum albumin  GH  glucoheptonate  GDS  global deterioration scale  FMZ  carbon-11 flumazenil  FLT  [18]F-3'-deoxy-3'-fluorothymidine  FET  O-(2-[18F]fluoroethyl)-L-tyrosine  FDOPA  3,4-dihydroxy-6-[18F]fluoro-phenylalanine  FDG  fluorine-18 2-fluoro-deoxyglucose  ENSDF  evaluated nuclear structure data file  EHDP  ethane-1-hydroxy-1, 1-diphosphonate  EDTA  ethylene-diamine-tetra-acetic acid  ECD  ethyl cysteinate dimer  DTPA  diethylenetriamine pentaacetic acid  DPM  disintegration per minute  DOTA  1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid  DMSA  dimercaptosuccinic acid  CPM  count per minute  CMRO2  cerebral metabolic rate of oxygen  CMRglc  cerebral metabolic rate of glucose  CBV  cerebral blood volume  CBF  cerebral blood flow   1 of 2