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MR Angiography Detects Blocked Arteries Accurately

Two independent readers evaluated the images. Blockages were detected with MR Angiography in 208 (reader 1) and 218 (reader 2) segments of artery, which correlated significantly to the DSA and CT findings.

In addition, MR Angiography proved highly accurate (94 to 100 percent) for detecting blockages of over 50 percent, and image quality was rated sufficient to excellent for 97 percent of the arterial segments evaluated.

"This procedure should be highly cost effective for clinical use, because of the speed and modest dose of contrast required," Dr. Nael said. "In the absence of contraindications to MRI, I would recommend MR Angiography over DSA and CTA for routine use—avoiding increased risk of mini-stroke and radiation exposure."

Dr. Nael predicts that in most cases, contrast-enhanced MR Angiography could replace other diagnostic techniques for evaluation of all the arteries that supply blood to the brain. "As the technology evolves, MR Angiography will likely become even faster and more powerful," he said.

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