静息态下320排容积CT对正常心肌灌注的研究

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Abstract Objective: To analyze the myocardial perfusion differences among each segment of the left ventricle using 320-slice volume CT in normal adults at resting state. Methods: One hundred and thirteen cases (68 males, 45 females; mean age 54±10 years) with no stenosis in coronary arteries based on coronary CT angiography (CTA) were included in the study. The data of CTA were used for the myocardial perfusion analysis with 16-segment standard model (excluding apex). The attenuation density (AD) and transmural perfusion ratio (TPR) of each segment were respectively recorded, and were compared in the same slice or among different slices. Results: In basal, middle and apical slices, the AD and TPR of the ventricular septum were (88.09±16.67) Hu and 1.21±0.20, (89.61±15.36) Hu and 1.13±0.14, (85.34±17.09) Hu and 1.24±0.17, respectively, which were higher compared with those of the non-septal walls (P<0.001). In basal and middle slices, AD of the anteroseptal myocardium (2, 8) were (92.28±16.71) Hu, (93.69±15.30) Hu, respectively, higher than those of each remaining segment (P<0.001). The apical slice (77.59±18.14) Hu showed lower AD than basal and middle slices (P<0.001). Conclusions: In adults with normal coronary arteries, the myocardial perfusion among each segment of left ventricle is different. The septum shows significantly higher AD and TPR than the anterior, lateral and inferior walls. The apical attenuation shows relatively lower value

Key words： tomography, X-ray computed myocardial perfusion attenuation density transmural perfusion ratio

Received: 22 April 2014

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	Articles by authors
	Kong Jianguo
	Xu Huazhi
	Wu Enfu
	Hu Hao
	Jiang Xin
	Wei Peiying
	Zhang Hua
	Zheng Yongfei

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https://xb.wmu.edu.cn/EN/ OR https://xb.wmu.edu.cn/EN/Y2014/V44/I9/653

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