title: Contrast-enhanced echo-planar MR imaging of myocardial perfusion: preliminary study in humans.
abstract: OBJECTIVE
  To evaluate the usefulness of T1- and T2*-weighted echo-planar magnetic resonance (MR) imaging in the assessment of cardiac perfusion.
  
  
  METHODS
  Sixteen subjects underwent MR imaging. Fifteen subjects were healthy volunteers and one had coronary artery disease. T2*-weighted echo-planar imaging with free induction decay was performed in 11 subjects and T1-weighted inversion-recovery spin-echo echo-planar imaging was performed in five. Images were obtained before and after administration of gadopentetate dimeglumine.
  
  
  RESULTS
  The contrast-to-noise ratio for pre- and postcontrast T2*-weighted images obtained with an echo time of 16 msec (n = 8) was -9.9 +/- 3.4, and the contrast enhancement ratio was -0.37 +/- 0.07. The values for T2*-weighted images obtained with an echo time of 30 msec (n = 3) were -9.5 +/- 6.8 and 0.44 +/- 0.02, respectively. For T1-weighted echo-planar imaging, the values were 26.7 +/- 8.0 and 4.6 +/- 2.8, respectively.
  
  
  CONCLUSIONS
  Inversion-recovery spin-echo echo-planar imaging provides excellent temporal resolution, myocardial detail, and myocardium-blood pool contrast, with minimal artifact. It is presently the technique of choice for the MR imaging evaluation of myocardial perfusion.
authors.affiliation: Department of Radiology, Beth Israel Hospital, Boston, MA 02215.
authors.forename: R R
authors.initials: RR
authors.lastname: Edelman
authors.forename: W
authors.initials: W
authors.lastname: Li
mesh_terms: D000328:Adult; D016477:Artifacts; D003287:Contrast Media; D003326:Coronary Circulation / Q000502:physiology*; D003327:Coronary Disease / Q000175:diagnosis*; D004338:Drug Combinations; D017352:Echo-Planar Imaging / Q000379:methods*; D005260:Female; D005682:Gadolinium; D019786:Gadolinium DTPA; D006321:Heart / Q000033:anatomy & histology*; D006801:Humans; D008297:Male; D008536:Meglumine; D009942:Organometallic Compounds; D004369:Pentetic Acid / Q000031:analogs & derivatives*
chemical_list: D003287:Contrast Media; D004338:Drug Combinations; D009942:Organometallic Compounds; D008536:Meglumine; D004369:Pentetic Acid; D005682:Gadolinium; D019786:Gadolinium DTPA