MR-guided liver biopsy within a short, wide-bore 1.5 Tesla MR system

被引:34
作者
Stattaus, Joerg [1 ]
Maderwald, Stefan [2 ]
Baba, Hideo A. [3 ]
Gerken, Guido [4 ]
Barkhausen, Joerg [1 ]
Forsting, Michael [1 ]
Ladd, Mark E. [2 ]
机构
[1] Univ Duisburg Essen, Univ Hosp Essen, Dept Diagnost & Intervent Radiol & Neuroradiol, D-45122 Essen, Germany
[2] Univ Duisburg Essen, Univ Hosp Essen, Erwin L Hahn Inst Magnet Resonance Imaging, D-45122 Essen, Germany
[3] Univ Duisburg Essen, Univ Hosp Essen, Dept Pathol & Neuropathol, D-45122 Essen, Germany
[4] Univ Duisburg Essen, Univ Hosp Essen, Dept Gastroenterol & Hepatol, D-45122 Essen, Germany
关键词
MR-guided biopsy; MR fluoroscopy; Focal liver lesions; High field MRI;
D O I
10.1007/s00330-008-1088-5
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
The purpose of this study was to evaluate the diagnostic efficacy of magnetic resonance (MR)-guided biopsy of focal liver lesions within a short, wide-bore 1.5-T MR system and to determine the duration and accuracy of needle placement using MR fluoroscopy guidance in 25 patients. Accuracy of needle placement was evaluated in two orthogonal planes, and the out-of-plane angle of needle deflection was measured. Needle positioning was characterised subjectively as centred, peripheral, or exterior relative to the lesion. Exterior positioning was corrected by a step-by-step procedure. Surgical resection (n=6), previous histologies (n=8), or clinical/radiological follow-up (n=11) served as the 'gold standard'. The guidance needle could be placed successfully using MR fluoroscopy in 20 of 25 patients (80%). Needle placement was rated as 'centred' in 11 and as 'peripheral' in nine patients. Median needle deflection was 2.6 degrees, with a median deviation of 3.4 mm. In five patients, the direct approach failed or was rated as 'exterior'; therefore, repositioning after needle stabilisation with a stainless-steel stylet was necessary. The diagnostic yield of all biopsies was: sensitivity 95.5%, specificity 100.0% and accuracy 96.0%. In conclusion, MR-guided biopsies in a short, wide-bore MR system yielded highly reliable biopsy results, and in most cases the direct approach with MR fluoroscopy guidance proved to be fast and accurate.
引用
收藏
页码:2865 / 2873
页数:9
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