title: Enhancement of relaxation rate with paramagnetic contrast agents in NMR imaging.
abstract: Enhancement of spin-lattice relaxation using oral ferric chloride and using inhaled oxygen is illustrated. A 0.06% solution of ferric chloride reduced the spin-lattice relaxation time in the fundus of the stomach from 730 ms to 285 ms. Ferric chloride may be useful as a bowel-labeling agent. In 5 volunteers inhalation of 100% oxygen decreased the mean observed spin-lattice relaxation time of blood within the left ventricular cavity. Although the change was small, it may have important uses in monitoring metabolic processes.
mesh_terms: D000005:Abdomen; D000328:Adult; D002712:Chlorides; D005290:Ferric Compounds / Q000008:administration & dosage*; D006321:Heart; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007501:Iron / Q000008:administration & dosage*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D010100:Oxygen / Q000008:administration & dosage*
chemical_list: D002712:Chlorides; D005290:Ferric Compounds; D007501:Iron; D010100:Oxygen; C024555:ferric chloride