New method of measuring coronary diameter by electron-beam computed tomographic angiography using adjusted thresholds determined by calibration with aortic opacity.

Funabashi N; Kobayashi Y; Kudo M; Asano M; Teramoto K; Komuro I; Rubin GD

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New method of measuring coronary diameter by electron-beam computed tomographic angiography using adjusted thresholds determined by calibration with aortic opacity.

机译：通过电子束计算机断层血管造影术测量冠状动脉直径的新方法，该方法使用通过对主动脉不透明度进行校准而确定的调整后阈值。

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BACKGROUND: In a previous study the adjusted thresholds at which the diameters of coronary arteries determined by enhanced electron-beam computed tomography (CT) scans are equal to the corresponding quantitative coronary angiography measurements were analyzed, and their correlation with maximum CT values for the vessel short axes was determined. A rapid accurate method for such measurements was sought by substituting maximum CT values for the descending aorta in the corresponding axial images for those for the short axes. METHODS AND RESULTS: In 8 patients, 179 sites were measured. Means (+/- SD) of adjusted thresholds and the maximum CT values for vessel short axes and the descending aorta in the corresponding axial images for all vessels were 108 +/-66, 227+/-80, and 363+/-75 Hounsfield Unit (HU), respectively. Adjusted thresholds correlated with the maximum CT values for the corresponding vessel short axes and the descending aorta in the corresponding axial images, with R2=0.55, 0.33, p<0.01, respectively. An abbreviated formula for use of maximum CT values for the descending aorta in the corresponding axial images was y=0.5x-75 (HU) (y= adjusted threshold, x= maximum CT value for the descending aorta in the corresponding axial image). CONCLUSIONS: The abbreviated formula provided a rapid, accurate method for measurements independent of arterial enhancement.

机译：背景：在先前的研究中，分析了通过增强电子束计算机断层扫描（CT）扫描确定的冠状动脉直径等于相应的定量冠状动脉造影测量值的调整阈值，并将其与血管的最大CT值相关联确定了短轴。通过在对应的轴向图像中用降主动脉的最大CT值代替短轴的CT值，寻求一种快速准确的测量方法。方法与结果：在8例患者中，测量了179个部位。所有血管在相应轴向图像中血管短轴和降主动脉的调整阈值和最大CT值的平均值（+/- SD）为108 +/- 66、227 +/- 80和363 +/- 75霍恩斯菲尔德（HU），分别。调整后的阈值与相应的血管短轴的最大CT值和相应的轴向图像中的降主动脉相关，R2分别为0.55、0.33，p <0.01。对于相应的轴向图像中降主动脉使用最大CT值的缩写公式为y = 0.5x-75（HU）（y =调整阈值，x =相应的轴向图像中降主动脉的最大CT值）。结论：缩写公式提供了一种快速，准确的测量方法，与动脉增强无关。

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来源
《Circulation journal》 |2004年第8期|共9页
作者
Funabashi N; Kobayashi Y; Kudo M; Asano M; Teramoto K; Komuro I; Rubin GD;
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正文语种 eng
中图分类心脏、血管（循环系）疾病;
关键词
X-Ray Computed Tomography; Aorta; Cardio-; Electrons; HU; 主动脉; 电子;

机译：X-Ray Computed Tomography;Aorta;Cardio-;Electrons;HU;主动脉;电子;

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机译：通过电子束计算机断层血管造影术测量冠状动脉直径的新方法，该方法使用通过对主动脉不透明度进行校准而确定的调整后阈值。
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New method of measuring coronary diameter by electron-beam computed tomographic angiography using adjusted thresholds determined by calibration with aortic opacity.

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