Overlapping cross-sections significantly improve the reproducibility of coronary calcium measurements by electron beam tomography: A phantom study

被引:20
作者
Achenbach, S [1 ]
Meissner, F [1 ]
Ropers, D [1 ]
Pohle, K [1 ]
Kusus, M [1 ]
Muschiol, G [1 ]
Daniel, WG [1 ]
Moshage, W [1 ]
机构
[1] Univ Erlangen Nurnberg, Dept Internal Med 2, D-91054 Erlangen, Germany
关键词
electron beam tomography; coronary calcification; computed tomography;
D O I
10.1097/00004728-200107000-00010
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Purpose: We conducted phantom studies to investigate whether overlapping cross-sections and volumetric scoring would significantly improve interscan reproducibility of electron beam tomography (EBT) for coronary artery calcium quantification. Method: Fifteen phantoms simulating various amounts of coronary calcification were scanned in five different positions with a slice thickness of 3.0 mm and a table feed of 3.0, 2.5, and 2.0 mm. For the conventional "Agatston score" and a "volume score" (total volume of calcified lesions), interscan variabilities were compared between the three image acquisition protocols. Results: Agatston score variability was significantly lower for the 2.0 mm table feed than for the 3.0 or 2.5 mm table feed (3.0 mm: 22.9 +/- 10.3%; 2.5 mm: 13.6 +/- 8.2%; 2.0 nun: 8.9 +/- 5.5%). Volume score variability was significantly lower for 2.5 and 2.0 mm table feed than for 3.0 mm table feed (3.0 mm: 21.7 +/- 11.0%; 2.5 mm: 10.9 +/- 5.9%; 2.0 mm: 9.8 +/- 5.9%). Conclusion: Overlapping cross-sections, especially in combination with volumetric scoring, significantly improved interscan reproducibility of EBT calcium quantification in a phantom study.
引用
收藏
页码:569 / 573
页数:5
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