| Diagnostic value of subtraction coronary computed tomography angiography in patients with mild-moderate calcification score |
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| Citation of this paper:.Diagnostic value of subtraction coronary computed tomography angiography in patients with mild-moderate calcification score[J].Chinese Journal of Clinical Medicine,2018,25(1):35-39 |
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| Abstract:Objective：To investigate the clinical diagnostic value of subtraction coronary computed tomography angiography (CCTA) in patients with mild-moderate calcification of coronary artery (Agatston score＜400). Methods：A retrospective analysis of 69 cases with mild-moderate coronary calcification undergoing subtraction CCTA was performed. The image quality of calcified segments was evaluated using 4-point scale method. The stenosis of calcified segment was quantitatively assessed and divided into four different classifications (Ⅰ-Ⅳ). The time for quantitative assessment of calcified segments was recorded. Results：〖JP2〗There were 113 calcified segments in 69 cases. The average image quality of calcified segments for conventional CCTA and subtraction CCTA was (3.4±0.6) and (3.8±0.4), respectively, with significant difference (P<0.01). The Kappa coefficient used to describe the consistency of the stenosis grading in these two imaging methods was 0.77. The average time needed for quantitative assessment was (105±44) s and (72±44) s, respectively, with significant difference (P<0.01). Conclusions：The two imaging methods have good consistency in evaluating stenosis grading in patients with mild-moderate calcification of coronary artery. Compared with conventional CCTA, subtraction CCTA can improve the image quality and reduce the time required for quantitative assessment of stenosis, thus improve the clinical efficiency. |
| keywords:coronary heart disease vascular calcification subtraction technique coronary computed tomography angiography |
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