Ruhl Karl M, Das Marco, Koos Ralf, Mühlenbruch Georg, Flohr Thomas G, Wildberger Joachim E, Günther Rolf W, Mahnken Andreas H
Department of Diagnostic Radiology, RWTH Aachen University, Germany.
Invest Radiol. 2006 Apr;41(4):370-3. doi: 10.1097/01.rli.0000197979.44181.92.
We sought to assess the variability of aortic valve calcifications (AVCs) regarding the reconstruction window at different heart phases using multislice-spiral computed tomography.
A total of 46 patients (26 men; mean age. 65 years) underwent AVC scoring with multislice-spiral computed tomography (12 x 0.75 mm, 120 kV, 133 mAseff). Image reconstruction was performed every 10% of the RR-interval (0-90%). AVC was quantified using Agatston score, calcium volume, and calcium mass. Images were assessed for least motion artifacts. Coefficients of variation and Wilcoxon test were calculated.
AVC scores are lowest at 60% and highest at 0% of the RR-interval (P < 0.001). Mean coefficients of variation were 36.2% (Agatston score), 38.7% (calcium volume), and 32.9% (calcium mass). At 60% (50-70%). minimal motion artifacts and the lowest variability of the scores were found.
AVC scores show large variability depending on the point of image reconstruction. Diastolic image reconstruction at 60% of the RR-interval is recommended.
我们试图使用多层螺旋计算机断层扫描评估不同心脏相位重建窗口下主动脉瓣钙化（AVC）的变异性。
共有46例患者（26名男性；平均年龄65岁）接受了多层螺旋计算机断层扫描（12×0.75毫米，120千伏，133毫安秒）的AVC评分。在RR间期的每10%（0 - 90%）进行图像重建。使用阿加斯顿评分、钙体积和钙质量对AVC进行量化。评估图像以确定最小运动伪影。计算变异系数和威尔科克森检验。
AVC评分在RR间期的60%时最低，在0%时最高（P < 0.001）。平均变异系数分别为36.2%（阿加斯顿评分）、38.7%（钙体积）和32.9%（钙质量）。在60%（50 - 70%）时，发现运动伪影最小且评分变异性最低。
AVC评分根据图像重建点显示出很大的变异性。建议在RR间期的60%进行舒张期图像重建。
