Comparative study of coronary CTA using 64 MSCT and delayed-enhanced MRI in evaluating the volume of myocardial infarction

WANG Xin-jiang; CAI Zu-long; ZHAO Hong; CHENG Liu-quan; JIA Nan; LI Zheng-fang; YANG Li; SU Ping; LIU Jian-jun

Journal of China Clinic Medical Imaging ›› 2009, Vol. 20 ›› Issue (5) : 338-341.

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Comparative study of coronary CTA using 64 MSCT and delayed-enhanced MRI in evaluating the volume of myocardial infarction

WANG Xin-jiang1, CAI Zu-long1, ZHAO Hong1, CHENG Liu-quan1,
JIA Nan1, LI Zheng-fang1, YANG Li1, SU Ping2, LIU Jian-jun2

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Abstract

Objective: To assess myocardial hypo-enhancement in demonstrating the myocardial infarction(MI) in coronary artery CT angiography(CTA) performed by 64-MSCT and to compare the results with delayed-enhanced MRI(DE-MRI). Materials and Methods: Twenty-three patients suspected of MI underwent both 64-MSCT and DE-MRI scanning. On 64-MSCT scanning, 60~85ml iodine contrast medium(370mgI/ml) were injected and flushed with 40ml saline, injection velocity is 4~5ml/s. The short axis of the left ventricle was reconstructed with 8mm slice thickness. On MRI scanning, contiguous left ventricular short-axis views were obtained 10 to 15min after the administration of gadopentetate dimeglumine 0.2mmol/kg. The hypo-enhanced volume from CTA and delay-enhanced volume from DE-MRI were measured and compared. Results: The MI volume measured by 64-MSCT and DE-MRI were (7.66±5.95)ml and (15.33±9.71)ml, respectively. The hypo-enhanced volume measured by 64-MSCT was correlated with that measured by DE-MRI(r=0.727). Conclusions: The MI demonstrated as hypo-enhanced region on CTA was underestimated compared to hyper-enhanced volume by DE-MRI.

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Myocardial infarction / Tomography / spiral computed / Magnetic resonance imaging

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WANG Xin-jiang;CAI Zu-long;ZHAO Hong;CHENG Liu-quan;JIA Nan;LI Zheng-fang;YANG Li;SU Ping;LIU Jian-jun. Comparative study of coronary CTA using 64 MSCT and delayed-enhanced MRI in evaluating the volume of myocardial infarction[J]. Journal of China Clinic Medical Imaging. 2009, 20(5): 338-341