OBJECTIVE: Providing high temporal and spatial resolution, perfusion MRI is an attractive alternative to traditional radionuclide methods like SPECT and PET. Although first-pass perfusion MRI examinations have gained increasing attention during the past years, this technique still exhibits relatively low signal-to-noise ratio and cardiac coverage. Previous studies have suggested that refocused gradient sequence technology (e.g., true fast imaging with steady-state precession [FISP]) should improve perfusion MRI examinations. The aim of this study was to assess myocardial perfusion deficits in patients with proven coronary artery disease using a saturation recovery true FISP perfusion sequence. SUBJECTS AND METHODS: Rest and stress perfusion MRI studies were performed in 22 patients with coronary artery disease at 1.5 T using a multislice saturation recovery true FISP sequence after the bolus injection of 0.025 mmol/kg of body weight of gadopentetate dimeglumine. The myocardium of each slice was divided into 12 radial segments with subdivision into subendocardial and subepicardial subregions. Myocardial perfusion was assessed semiquantitatively and independently for each subregion. The standard of reference for myocardial perfusion was SPECT. Delayed enhancement images were acquired after the injection of 0.15 mmol/kg of body weight of gadopentetate dimeglumine. RESULTS: Sensitivity and specificity of perfusion MRI examinations for the detection of perfusion deficits were 81% and 89%, respectively, for the semiquantitative perfusion parameter upslope and 78% and 86% for the parameter peak signal intensity. More specifically, rest perfusion examinations were able to detect areas of infarction, whereas stress examinations increased the perfusion differences between normal and ischemic myocardial areas. Excellent correlation was observed between rest perfusion and late enhancement findings (r = 0.90). CONCLUSION: In patients with single-vessel coronary artery disease, perfusion deficits can reliably be detected using a saturation recovery true FISP sequence. Semiquantitative perfusion parameters upslope and peak signal intensity yielded similar results.
OBJECTIVE: Providing high temporal and spatial resolution, perfusion MRI is an attractive alternative to traditional radionuclide methods like SPECT and PET. Although first-pass perfusion MRI examinations have gained increasing attention during the past years, this technique still exhibits relatively low signal-to-noise ratio and cardiac coverage. Previous studies have suggested that refocused gradient sequence technology (e.g., true fast imaging with steady-state precession [FISP]) should improve perfusion MRI examinations. The aim of this study was to assess myocardial perfusion deficits in patients with proven coronary artery disease using a saturation recovery true FISP perfusion sequence. SUBJECTS AND METHODS: Rest and stress perfusion MRI studies were performed in 22 patients with coronary artery disease at 1.5 T using a multislice saturation recovery true FISP sequence after the bolus injection of 0.025 mmol/kg of body weight of gadopentetate dimeglumine. The myocardium of each slice was divided into 12 radial segments with subdivision into subendocardial and subepicardial subregions. Myocardial perfusion was assessed semiquantitatively and independently for each subregion. The standard of reference for myocardial perfusion was SPECT. Delayed enhancement images were acquired after the injection of 0.15 mmol/kg of body weight of gadopentetate dimeglumine. RESULTS: Sensitivity and specificity of perfusion MRI examinations for the detection of perfusion deficits were 81% and 89%, respectively, for the semiquantitative perfusion parameter upslope and 78% and 86% for the parameter peak signal intensity. More specifically, rest perfusion examinations were able to detect areas of infarction, whereas stress examinations increased the perfusion differences between normal and ischemic myocardial areas. Excellent correlation was observed between rest perfusion and late enhancement findings (r = 0.90). CONCLUSION: In patients with single-vessel coronary artery disease, perfusion deficits can reliably be detected using a saturation recovery true FISP sequence. Semiquantitative perfusion parameters upslope and peak signal intensity yielded similar results.
Authors: Christina Doesch; Achim Seeger; Tobias Hoevelborn; Bernhard Klumpp; Michael Fenchel; Ulrich Kramer; Birgitt Schönfisch; Claus D Claussen; Meinrad Gawaz; Stephan Miller; Andreas E May Journal: Clin Res Cardiol Date: 2008-09-05 Impact factor: 5.460
Authors: Hideki Futamatsu; Chris Klassen; Marco Pilla; Norbert Wilke; Dominick J Angiolillo; Stuart Smalheiser; Alan Siuciak; Nobuaki Suzuki; Theodore A Bass; Marco A Costa Journal: Int J Cardiovasc Imaging Date: 2007-09-11 Impact factor: 2.357
Authors: Yasuyuki Kobayashi; Jon T Giles; Masaharu Hirano; Isamu Yokoe; Yasuo Nakajima; Joan M Bathon; Joao A C Lima; Hitomi Kobayashi Journal: Arthritis Res Ther Date: 2010-09-13 Impact factor: 5.156
Authors: Daniel Thomas; Katharina Strach; Carsten Meyer; Claas P Naehle; Sebastian Schaare; Sven Wasmann; Hans H Schild; Torsten Sommer Journal: J Cardiovasc Magn Reson Date: 2008-12-18 Impact factor: 5.364
Authors: Bernhard L Gerber; Subha V Raman; Krishna Nayak; Frederick H Epstein; Pedro Ferreira; Leon Axel; Dara L Kraitchman Journal: J Cardiovasc Magn Reson Date: 2008-04-28 Impact factor: 5.364