Comparison of 3D computer-aided with manual cerebral aneurysm measurements in different imaging modalities

被引:13
作者
Groth, M. [1 ]
Forkert, N. D. [2 ]
Buhk, J. H. [1 ]
Schoenfeld, M. [1 ]
Goebell, E. [1 ]
Fiehler, J. [1 ]
机构
[1] Univ Med Ctr Hamburg Eppendorf, Dept Diagnost & Intervent Neuroradiol, D-20246 Hamburg, Germany
[2] Univ Med Ctr Hamburg Eppendorf, Dept Computat Neurosci, D-20246 Hamburg, Germany
关键词
Intracranial aneurysm; Reliability of results; Computer-assisted image analysis; MRI; DSA; INTRACRANIAL ANEURYSMS; ENDOVASCULAR TREATMENT; MR-ANGIOGRAPHY; TOMOGRAPHY; ACCURACY; SIZE;
D O I
10.1007/s00234-012-1095-8
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
To compare intra- and inter-observer reliability of aneurysm measurements obtained by a 3D computer-aided technique with standard manual aneurysm measurements in different imaging modalities. A total of 21 patients with 29 cerebral aneurysms were studied. All patients underwent digital subtraction angiography (DSA), contrast-enhanced (CE-MRA) and time-of-flight magnetic resonance angiography (TOF-MRA). Aneurysm neck and depth diameters were manually measured by two observers in each modality. Additionally, semi-automatic computer-aided diameter measurements were performed using 3D vessel surface models derived from CE- (CE-com) and TOF-MRA (TOF-com) datasets. Bland-Altman analysis (BA) and intra-class correlation coefficient (ICC) were used to evaluate intra- and inter-observer agreement. BA revealed the narrowest relative limits of intra- and inter-observer agreement for aneurysm neck and depth diameters obtained by TOF-com (ranging between +/- 5.3 % and +/- 28.3 %) and CE-com (ranging between +/- 23.3 % and +/- 38.1 %). Direct measurements in DSA, TOF-MRA and CE-MRA showed considerably wider limits of agreement. The highest ICCs were observed for TOF-com and CE-com (ICC values, 0.92 or higher for intra- as well as inter-observer reliability). Computer-aided aneurysm measurement in 3D offers improved intra- and inter-observer reliability and a reproducible parameter extraction, which may be used in clinical routine and as objective surrogate end-points in clinical trials.
引用
收藏
页码:171 / 178
页数:8
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