Calcium scoring using 64-slice MDCT, dual source CT and EBT: a comparative phantom study.
Calcium scoring using 64-slice MDCT, dual source CT and EBT: a comparative phantom study.
复制标题
使用64片MDCT，双源CT和EBT的钙评分：一项比较幻影研究。
DOI：
10.1007/s10554-007-9282-0
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发表时间：
2008-06
影响因子：
2.1
通讯作者：
Oudkerk, M.
中科院分区：
文献类型：
--
作者：
Groen, Jaap M.;Greuter, Marcel J. W.;Vliegenthart, R.;Suess, C.;Schmidt, B.;Zijlstra, F.;Oudkerk, M.
目的评估64层多探测器计算机断层扫描（MDCT）扫描仪、双源计算机断层扫描（DSCT）扫描仪和电子束断层扫描（EBT）扫描仪上的钙评分（Ca评分），并将其作为心率、层厚和钙密度的函数。方法与材料应用64层螺旋CT、双源CT和EBT对3条不同大小和密度的钙化动脉进行静息（0次/min）和50-110次/min（10次/min）扫描。用0.6和3.0 mm的层厚重建图像。测定每支动脉的Agatston评分、体积评分和等效质量评分。引入心脏运动敏感性（CMS）指数来评估Ca评分对心率的敏感性。此外，还引入了差异（Δ）指数来评估MDCT和DSCT与EBT的绝对Ca评分差异。结果Ca评分在60 bpm以下相对稳定，在70 bpm以上开始下降或增加，这取决于评分方法、钙化密度和层厚。EBT显示对心脏运动的敏感性最小，平均CMS指数最小（2.5）。64层MDCT的平均CMS指数（9.0）约为DSCT平均CMS指数（3.6）的2.5倍。使用较小的层厚会降低两种CT模式的CMS指数。0.6 mm处DSCT的Δ指数（53.2）比0.6 mm处64层MDCT的Δ指数（72.0）低约30%。两种模式在3.0 mm处的Δ指数大致相等（64层MDCT和DSCT分别为96.9和102.0）。结论心率、层厚和所用模式影响CA评分。DSCT上的Ca评分对心脏运动的敏感性比64层MDCT低约50%。当使用更小的层厚时，DSCT比64层MDCT提供了更好的EBT绝对钙评分近似值。较小的切片厚度降低了对心脏运动的敏感性，并减少了CT数据和EBT数据之间的差异。CT上EBT的最佳近似值为层厚为0.6 mm的DSCT。
Purpose Assessment of calcium scoring (Ca-scoring) on a 64-slice multi-detector computed tomography (MDCT) scanner, a dual-source computed tomography (DSCT) scanner and an electron beam tomography (EBT) scanner with a moving cardiac phantom as a function of heart rate, slice thickness and calcium density. Methods and materials Three artificial arteries with inserted calcifications of different sizes and densities were scanned at rest (0 beats per minute) and at 50–110 beats per minute (bpm) with an interval of 10 bpm using 64-slice MDCT, DSCT and EBT. Images were reconstructed with a slice thickness of 0.6 and 3.0 mm. Agatston score, volume score and equivalent mass score were determined for each artery. A cardiac motion susceptibility (CMS) index was introduced to assess the susceptibility of Ca-scoring to heart rate. In addition, a difference (Δ) index was introduced to assess the difference of absolute Ca-scoring on MDCT and DSCT with EBT. Results Ca-score is relatively constant up to 60 bpm and starts to decrease or increase above 70 bpm, depending on scoring method, calcification density and slice thickness. EBT showed the least susceptibility to cardiac motion with the smallest average CMS-index (2.5). The average CMS-index of 64-slice MDCT (9.0) is approximately 2.5 times the average CMS-index of DSCT (3.6). The use of a smaller slice thickness decreases the CMS-index for both CT-modalities. The Δ-index for DSCT at 0.6 mm (53.2) is approximately 30% lower than the Δ-index for 64-slice MDCT at 0.6 mm (72.0). The Δ-indexes at 3.0 mm are approximately equal for both modalities (96.9 and 102.0 for 64-slice MDCT and DSCT respectively). Conclusion Ca-scoring is influenced by heart rate, slice thickness and modality used. Ca-scoring on DSCT is approximately 50% less susceptible to cardiac motion as 64-slice MDCT. DSCT offers a better approximation of absolute calcium score on EBT than 64-slice MDCT when using a smaller slice thickness. A smaller slice thickness reduces the susceptibility to cardiac motion and reduces the difference between CT-data and EBT-data. The best approximation of EBT on CT is found for DSCT with a slice thickness of 0.6 mm.
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影响因子：
158.5
作者：
Callister, TQ;Raggi, P;Russo, DJ
通讯作者：
Russo, DJ
影响因子：
5.9
作者：
Ohnesorge, B;Flohr, T;Becker, CR
通讯作者：
Becker, CR
影响因子：
2.4
作者：
Schmermund, Axel;Moehlenkamp, Stefan;Erbel, Raimund
通讯作者：
Erbel, Raimund
DOI：
10.1016/0735-1097(90)90282-t
发表时间：
1990-03-15
影响因子：
24
作者：
AGATSTON, AS;JANOWITZ, WR;DETRANO, R
通讯作者：
DETRANO, R
影响因子：
19.7
作者：
Achenbach, S;Ropers, D;Moshage, W
通讯作者：
Moshage, W