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Title of Journal: Pediatr Cardiol

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Abbravation: Pediatric Cardiology

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Springer US

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DOI

10.1002/div.5830

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1432-1971

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Assessments of Coronary Artery Visibility and Radi

Authors: Y Cui M Huang J Zheng J Li H Liu C Liang
Publish Date: 2015/08/14
Volume: 37, Issue: 1, Pages: 135-143
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Abstract

The aim of this study was to compare the coronary artery visibility and radiation dose in infants with CHD on cardiac 128slice CT and on cardiac 64slice CT The images of 200 patients were analyzed in this study 100 patients were selected randomly from a group of 789 infants 1 years old with CHD undergoing 128slice CT prospective ECGtriggered axial scan and 100 were selected randomly from 911 infants with CHD undergoing 64slice CT retrospective ECGgated spiral scan The visibility of coronary artery segments was graded on a fourpoint scale The coronary arteries were considered to be detected or visible when grade was 2 or higher The visibility of the coronary artery segments and the radiation dose was compared between the two groups Except for the rate of LM 96 vs 99  the detection rates of the total LAD LCX RCA and the proximal segment of the RCA in the 256slice CT group were significantly higher than those in the 64slice CT group 517 5333 3367 5333 and 99 vs 348 3433 18 3067 and 75  respectively The counts of visibility score 4/3/2/1 for the LM and the proximal segment of the RCA were 62/22/12/4 and 56/20/17/7 respectively in the 128slice CT group and 17/42/30/1 and 9/30/38/25 respectively in the 64slice CT group There were significant differences especially for score 4 and 3 between the two groups The radiation dose in the 128slice CT group was significantly decreased than those in the 64slice CT group CTDIvol 188 ± 051 vs 561 ± 063 mGy SSDE 448 ± 115 vs 1397 ± 152 mGy effective radiation dose 136 ± 044 vs 406 ± 07 mSv With reduced radiation dose the visibility of the coronary artery in infants with CHD via prospective ECGtriggered mode on a 128slice CT is superior to that of the 64slice CT using retrospective ECGgated spiral mode

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