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首页> 外文期刊>Academic radiology >Intraindividual comparison of 3D coronary MR angiography and coronary CT angiography.
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Intraindividual comparison of 3D coronary MR angiography and coronary CT angiography.

机译：3D冠状动脉MR血管造影和冠状动脉CT血管造影的个人比较。

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RATIONALE AND OBJECTIVES: To compare the diagnostic value of magnetic resonance (MR) and computed tomography (CT) for the detection of coronary artery disease (CAD) with special regard to calcifications. MATERIALS AND METHODS: Twenty-seven patients with known CAD were examined with a targeted, navigator-gated, free-breathing, steady-state free precession MR angiography sequence (repetition time = 5.6 milliseconds, echo time = 2.8 milliseconds, flip angle 110 degrees ) and 16-slice coronary CT angiography. Segment-based sensitivity, specificity, and accuracy for the detection of stenoses larger than 50% were determined as defined by the gold standard catheter coronary angiography along with the subjective image quality (Grade 1-4). The degree of calcifications in each segment was quantified using a standard calcium scoring tool. RESULTS: Of 115 possible segments, 7% had to be excluded in MR imaging because of poor image quality. In CT, 3% were nondiagnostic because of image quality and 15% were not evaluable because of calcifications. Values for the detection of relevant coronary artery stenoses in the evaluated segments were: sensitivity: MR imaging 85% versus CT 96%; specificity: 88% versus 96%; accuracy: 87% versus. 96%. Average subjective image quality was 1.8 for MR imaging and 1.6 for CT. Of the 15% of segments that had to be excluded from CT evaluation because of calcifications, MR imaging provided the correct diagnosis segments in 67%. CONCLUSIONS: CT provided a better image quality with superior accuracy for the detection of CAD. Despite its overall inferiority, MR imaging proved to be helpful method in interpreting coronary stenosis in severely calcified segments.
机译：理由和目的：比较磁共振（MR）和计算机断层扫描（CT）对钙化的冠状动脉疾病（CAD）检测的诊断价值。材料与方法：对27例已知CAD的患者进行了有针对性的导航，门控，自由呼吸，稳态自由进动MR血管造影序列（重复时间= 5.6毫秒，回声时间= 2.8毫秒，翻转角110度） ）和16层冠状动脉CT血管造影。根据金标准导管冠状动脉造影以及主观图像质量（1-4级），确定了基于节段的敏感性，特异性和大于50％狭窄的检测准确性。使用标准钙计分工具量化每个节段的钙化程度。结果：在115个可能的节段中，由于图像质量差，必须在MR成像中排除7％。在CT中，有3％由于图像质量无法诊断，有15％由于钙化而无法评估。在评估的部分中检测相关冠状动脉狭窄的值是：敏感性：MR成像为85％，CT为96％;特异性：88％对96％;准确度：87％。 96％。 MR成像的平均主观图像质量为1.8，CT的平均主观图像质量为1.6。在由于钙化而不得不从CT评估中排除的15％的节段中，MR成像提供了正确的诊断节段，占67％。结论：CT为检测CAD提供了更好的图像质量和更高的精度。尽管其总体自卑性，但MR影像被证明是解释严重钙化节段中冠状动脉狭窄的有用方法。

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