不同重组视野影响冠状动脉支架成像质量及支架内再狭窄的初步研究

发布时间：2018-12-27 20:10

【摘要】：目的评估宝石CT高清HD-Detail模式下视野(FOV)的变化对冠状动脉支架成像质量的影响及对支架内再狭窄的检出率。方法搜集冠状动脉支架植入术后随访的患者76例,均行标准化的宝石CT高清冠状动脉扫描。扫描图像以不同FOV进行重组,以标准扫描FOV 25 cm为参照,对比不同重组FOV 15 cm、10 cm图像质量并进行统计学分析。另与32例同期行冠状动脉造影(CAG)检查的患者结果做一致性分析。结果对支架的客观指标(支架腔内直径、支架内CT值差值及信噪比)进行测量并进行配对t检验,差异有统计学意义(P0.05);图像主观评分:对比标准扫描FOV,在小视野重组下对支架所在冠状动脉评分值较高,差异有统计学意义(P0.05);与"金标准"CAG对比,小FOV 10 cm重组图像对于支架再狭窄诊断的灵敏度(94.4%)、阳性预测值(89.5%)及诊断符合率(93.1%)显著提高,且小FOV重组与CAG检查对于支架再狭窄的检出率具有高度一致性(K=0.853)。结论宝石CT HD高清扫描HD-Detail重组模式下,当减小FOV时,能够有效改善冠状动脉支架细节及支架管径内部的显示,提高支架血管的可判读性,对支架再狭窄的判别性更高。
[Abstract]:Objective to evaluate the effect of changes of visual field (FOV) on coronary stent imaging quality and the detection rate of restenosis in stents under gemstone CT high definition HD-Detail mode. Methods 76 patients who were followed up after coronary stent implantation underwent standardized CT high-definition coronary artery scanning. The quality of different reconstructed FOV 15 cm,10 cm images was compared and statistically analyzed by comparing the quality of different FOV 15 cm,10 cm images with different FOV and standard scanning FOV 25 cm as the reference. In addition, consistency analysis was made with 32 patients who underwent coronary angiography (CAG) at the same time. Results the objective indexes (stent diameter, CT difference and signal-to-noise ratio) were measured and matched t test. The difference was statistically significant (P0.05). Image subjective score: contrast standard scan FOV, in small field reconstruction of the coronary artery in the stent score was higher, the difference was statistically significant (P0.05); Compared with "gold standard" CAG, the sensitivity (94.4%), positive predictive value (89.5%) and diagnostic coincidence rate (93.1%) of small FOV 10 cm recombination images for stent restenosis were significantly improved. The detection rate of stent restenosis was highly consistent with small FOV recombination and CAG examination (K0. 853). Conclusion under the recombination mode of gem CT HD high-definition scanning HD-Detail, when the FOV is reduced, the details of coronary stents and the internal display of stent diameter can be effectively improved, and the legibility of stent vessels can be improved, and the discrimination of stent restenosis is higher.
【作者单位】：新疆医科大学第一附属医院影像中心;新疆昌吉州奇台县人民医院MRI室;
【基金】：乌鲁木齐市科学技术计划项目基金资助项目(编号:Y121320019)
【分类号】：R541.4;R816.2

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