High-Definition Computed Tomography for Coronary Artery Stent Imaging: a Phantom Study
High-Definition Computed Tomography for Coronary Artery Stent Imaging: a Phantom Study
复制标题
用于冠状动脉支架成像的高清计算机断层扫描：一项模型研究
作者：
W. Yang;Ke;L. Pang;Ying Guo;Jian Ying Li;Huan Zhang;Z. Pan
目的 通过比较传统64排标清CT（SDCT）不同扫描模式，评估高清CT（HDCT）对小口径冠状动脉支架（≤3 mm）成像的性能。材料和方法 通过 HDCT 和 SDCT 扫描具有 12 个支架（直径 2.5 mm 和 3.0 mm）的心脏模型。扫描模式为回顾性心电图 (ECG) 门控螺旋扫描和前瞻性心电图触发轴向扫描，管电压分别为 120 kVp 和 100 kVp。由两名观察者测量支架内径（ISD）和支架内衰减值（AVin-stent）和血管内支架外衰减值（AVin-vessel）。计算了人工管腔变窄（ALN = [ISD - ISDmeasured]/ISD）以及支架内和血管内之间的人工衰减增加（AAI = AVin-stent - AVin-vessel）。所有数据均通过组内相关性和方差分析进行分析。结果 两名观察者之间的ISD、AVin-血管和AVin-支架相关系数良好。 HDCT 的 ALN 在统计学上低于 SDCT（30 ± 5.7% 与 35 ± 5.4%，p < 0.05）。 HDCT 的 AAI 值在统计学上低于 SDCT（15.7 ± 81.4 HU 对比 71.4 ± 90.5 HU，p < 0.05）。在 HDCT 和 SDCT 上，前瞻性轴向数据集显示出比回顾性螺旋数据集更小的 ALN (p < 0.05)。此外，HDCT 上 120 kVp 和 100 kVp 管电压之间的 ALN 没有差异 (p = 0.05)。结论 与SDCT相比，高清CT有助于提高冠状动脉支架成像的测量精度。 100 kVp 的 HDCT 和前瞻性心电图触发轴向技术的辐射剂量低于 120 kVp 应用，可能有利于评估较小口径（≤ 3 mm）的冠状动脉支架。
Objective To assess the performance of a high-definition CT (HDCT) for imaging small caliber coronary stents (≤ 3 mm) by comparing different scan modes of a conventional 64-row standard-definition CT (SDCT). Materials and Methods A cardiac phantom with twelve stents (2.5 mm and 3.0 mm in diameter) was scanned by HDCT and SDCT. The scan modes were retrospective electrocardiography (ECG)-gated helical and prospective ECG-triggered axial with tube voltages of 120 kVp and 100 kVp, respectively. The inner stent diameters (ISD) and the in-stent attenuation value (AVin-stent) and the in-vessel extra-stent attenuation value (AVin-vessel) were measured by two observers. The artificial lumen narrowing (ALN = [ISD - ISDmeasured]/ISD) and artificial attenuation increase between in-stent and in-vessel (AAI = AVin-stent - AVin-vessel) were calculated. All data was analyzed by intraclass correlation and ANOVA-test. Results The correlation coefficient of ISD, AVin-vessel and AVin-stent between the two observers was good. The ALNs of HDCT were statistically lower than that of SDCT (30 ± 5.7% versus 35 ± 5.4%, p < 0.05). HDCT had statistically lower AAI values than SDCT (15.7 ± 81.4 HU versus 71.4 ± 90.5 HU, p < 0.05). The prospective axial dataset demonstrated smaller ALN than the retrospective helical dataset on both HDCT and SDCT (p < 0.05). Additionally, there were no differences in ALN between the 120 kVp and 100 kVp tube voltages on HDCT (p = 0.05). Conclusion High-definition CT helps improve measurement accuracy for imaging coronary stents compared to SDCT. HDCT with 100 kVp and the prospective ECG-triggered axial technique, with a lower radiation dose than 120 kVp application, may be advantageous in evaluating coronary stents with smaller calibers (≤ 3 mm).
使用 64-MDCT 评估支架内再狭窄：CORE-64 多中心国际试验分析。
DOI：
10.2214/ajr.09.2652
发表时间：
2010
期刊：
AJR. American journal of roentgenology
影响因子：
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作者：
Wykrzykowska,JoannaJ;Arbab-Zadeh,Armin;Godoy,Gustavo;Miller,JulieM;Lin,Shezhang;Vavere,Andrea;Paul,Narinder;Niinuma,Hiroyuki;Hoe,John;Brinker,Jeffrey;Khosa,Faisal;Sarwar,Sheryar;Lima,Joao;Clouse,MelvinE
通讯作者：
Clouse,MelvinE