Department of Diagnostic and Interventional Radiology, University Hospital, RWTH Aachen University, Pauwelsstr. 30, 52074, Aachen, Germany.
Eur Radiol. 2012 Dec;22(12):2670-8. doi: 10.1007/s00330-012-2539-6. Epub 2012 Jun 30.
To compare image quality in coronary artery computed tomography angiography (cCTA) using reconstructions with automated phase detection and Reconstructions computed with Identical Filling of the heart (RIF).
Seventy-four patients underwent ECG-gated dual source CT (DSCT) between November 2009 and July 2010 for suspected coronary heart disease (n = 35), planning of transcatheter aortic valve replacement (n = 34) or evaluation of ventricular function (n = 5). Image data sets by the RIF formula and automated phase detection were computed and evaluated with the AHA 15-segment model and a 5-grade Likert scale (1: poor, 5: excellent quality). Subgroups regarding rhythm (sinus rhythm = SR; arrhythmia = ARR) and potential premedication were evaluated by a per-segment, per-vessel and per-patient analysis.
RIF significantly improved image quality in 10 of 15 coronary segments (P < 0.05). More diagnostic segments were provided by RIF regarding the entire cohort (n = 693 vs. 590, P < 0.001) and all of the subgroups (e.g. ARR: n = 143 vs. 72, P < 0.001). In arrhythmic patients (n = 19), more diagnostic vessels (e.g. LAD: n = 10 vs. 3; P < 0.014) and complete data sets (n = 7 vs. 1; P < 0.001) were produced.
RIF reconstruction is superior to automatic diastolic non-edited reconstructions, especially in arrhythmic patients. RIF theory provides a physiological approach for determining the optimal image reconstruction point in ECG-gated CT angiography.
Conventional CT coronary angiography suffers from numerous artefacts in patients with irregular rhythms. Coronary computed tomography angiograms (cCTA) were reconstructed with identical cardiac filling (RIF). RIF reconstructions provide improved image quality compared to non-edited standard reconstructions. RIF theory links physiology with cardiac CT.
比较冠状动脉计算机断层血管造影术（cCTA）中使用自动相位检测和重建与心脏充盈重建（RIF）的重建图像质量。
2009 年 11 月至 2010 年 7 月期间，74 例患者因疑似冠心病（n = 35）、经导管主动脉瓣置换术计划（n = 34）或心室功能评估（n = 5）接受了 ECG 门控双源 CT（DSCT）检查。使用 AHA 15 节段模型和 5 级李克特量表（1：差，5：极好）对 RIF 公式和自动相位检测的图像数据集进行计算和评估。通过每节段、每支血管和每位患者的分析评估节律（窦性节律=SR；心律失常=ARR）和潜在的预治疗亚组。
RIF 显著改善了 15 个冠状动脉节段中的 10 个节段的图像质量（P < 0.05）。RIF 提供了更多可诊断的节段，包括整个队列（n = 693 对 590，P < 0.001）和所有亚组（例如 ARR：n = 143 对 72，P < 0.001）。在心律失常患者（n = 19）中，更多的诊断血管（例如 LAD：n = 10 对 3；P < 0.014）和完整的数据集（n = 7 对 1；P < 0.001）。
RIF 重建优于自动舒张非编辑重建，特别是在心律失常患者中。RIF 理论为 ECG 门控 CT 血管造影中确定最佳图像重建点提供了一种生理方法。
常规 CT 冠状动脉造影在节律不规则的患者中存在许多伪影。冠状动脉计算机断层血管造影（cCTA）使用心脏充盈重建（RIF）进行重建。与非编辑标准重建相比，RIF 重建可提供更高的图像质量。RIF 理论将生理学与心脏 CT 联系起来。
