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[Clinical diagnostic valuation cine magnetic resonance coronary angiography]
1General Hospital, Commission of Science Technology and Industry for National Defense, Beijing.
Objective:
To assess the ability of imaging coronary arteries noninvasively with magnetic resonance angiography technique (MRCA) and its diagnostic value in coronary artery disease.
Methods:
MRCA was performed on 33 subjects, including 12 healthy adult volunteers and 21 patients with available recent X-ray contrast angiography (XCA) results. MRCA technique consisted of a gradient echo sequence (Turbo-Cine), two-dimensional acquisition, fat suppression, peripheral gating. Subjects were imaged in supine position using a standard body coil, without breath-hold.
Results:
All 33 subjects were imaged successfully. Identification of the coronary artery was possible for the right coronary, left main stem, left anterior, and left circumflex arteries respectively in 97%, 100%, 91% and 91% with a visualized mean length of 51 +/- 15 (28-80 mm), 11 +/- 4 (4-22 mm), 44 +/- 13 (24-66 mm), 40 +/- 12 (20-66 mm). In the 21 subjects with available XCA results, 78% (29/37) proximal stenoses of the coronary arteries were detected with MRCA.
Conclusion:
At current stage, MRCA can depict most of the hemodynamically significant proximal stenoses but not the distals. This procedure can be used as an alternative imaging application under certain clinical indications.