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Abstract #1507

The diagnostic accuracy of model-based quantitative perfusion cardiac MR at 3.0T for the detection of flow-limiting coronary artery disease

Masafumi Takafuji1, Masaki Ishida1, Satoshi Nakamura1, Haruno Ito1, Takanori Kokawa1, Suguru Araki1, Shintaro Yamaguchi1, Miyuko Fujita1, Tairo Kurita2, Kaoru Dohi2, and Hajime Sakuma1
1Radiology, Mie University Hospital, Tsu, Japan, 2Cardiology and Nephrology, Mie University Hospital, Tsu, Japan

Synopsis

Keywords: Atherosclerosis, Cardiovascular, Myocardial Perfusion

Motivation: Model-based quantitative myocardial perfusion MRI is feasible. However, few studies have investigated its diagnostic accuracy in detecting significant coronary artery disease (CAD).

Goal(s): To evaluate the diagnostic accuracy of quantitative stress myocardial perfusion MRI using Patlak plot method for the detection of significant CAD.

Approach: Myocardial blood flow (MBF) and myocardial flow reserve (MFR) determined by Patlak analysis of stress perfusion MRI with LV blood saturation correction were compared with fractional flow reserve.

Results: Model-based quantitative stress perfusion MRI has a high diagnostic accuracy for detecting significant CAD with the AUC of 0.739 and 0.745 for stress MBF and MFR, respectively.

Impact: Absolute quantification of myocardial blood flow and myocardial flow reserve by stress-rest myocardial perfusion MRI with model-based approach permits accurate and objective assessment of myocardial ischemia due to flow-limiting obstructive coronary artery disease, which can aid daily routine clinical practice.

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Keywords