Dynamic myocardial load CT perfusion imaging challenges cardiac MRI

A preliminary study by a research team led by Markus Weininger of Charleston University School of Medicine in South Carolina found that cardiac MRI may face the challenge of adenosine-loaded CT imaging of myocardial perfusion. The research won the RSNA Scientific Research Achievement Award, and the group will discuss the dual-source CT technology at RSNA.

The research team used dual-source CT imaging examination, prospective coronary coronary angiography, dynamic adenosine load once myocardial perfusion imaging scanner "shuttle" mode, and delayed enhanced imaging for 20 patients. Similar to CT examinations, all subjects underwent stress / rest delayed enhancement MRI examinations.

The researchers evaluated the degree of myocardial perfusion defects and compared the index of myocardial to left ventricular uphill examination from CT and MRI sources.

The study found that the sensitivity rates of MRI and CT for the detection of myocardial perfusion defects were 86% and 98%, respectively, and the positive and negative predictive values ​​were 93% and 94%, respectively.

The team finally concluded that adenosine-loaded myocardial perfusion imaging CT can be used to obtain qualitative and semi-quantitative parameters in myocardial blood flow perfusion, similar to the effect of MRI, and to obtain absolute values ​​of myocardial blood flow.

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