Diffusion-weighted whole-body MR imaging with background body signal suppression:: a feasibility study at 3.0 Tesla

被引:105
作者
Muertz, Petra
Krautmacher, Carsten
Traeber, Frank
Gieseke, Juergen
Schild, Hans H.
Willinek, Winfried A.
机构
[1] Univ Bonn, Dept Radiol, D-53105 Bonn, Germany
[2] Philips Med Syst, NL-5680DA Best, Netherlands
[3] Univ Bonn, Radiol Klin, D-53105 Bonn, Germany
关键词
Diffusion magnetic resonance imaging; Whole body imaging; High field; 3; 0; Tesla;
D O I
10.1007/s00330-007-0717-8
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 was to provide a diffusion-weighted whole-body magnetic resonance (MR) imaging sequence with background body signal suppression (DWIBS) at 3.0 Tesla. A diffusion-weighted spin-echo echo-planar imaging sequence was combined with the following methods of fat suppression: short TI inversion recovery (STIR), spectral attenuated inversion recovery (SPAIR), and spectral presaturation by inversion recovery (SPIR). Optimized sequences were implemented on a 3.0- and a 1.5-Tesla system and evaluated in three healthy volunteers and six patients with various lesions in the neck, chest, and abdomen on the basis of reconstructed maximum intensity projection images. In one patient with metastases of malignant melanoma, DWIBS was compared with F-18-fluorodeoxyglucose positron emission tomography (FDG-PET). Good fat suppression for all regions and diagnostic image quality in all cases could be obtained at 3.0 Tesla with the STIR method. In comparison with 1.5 Tesla, DWIBS images at 3.0 Tesla were judged to provide a better lesion-to-bone tissue contrast. However, larger susceptibility-induced image distortions and signal intensity losses, stronger blurring artifacts, and more pronounced motion artifacts degraded the image quality at 3.0 Tesla. A good correlation was found between the metastases as depicted by DWIBS and those as visualized by FDG-PET. DWIBS is feasible at 3.0 Tesla with diagnostic image quality.
引用
收藏
页码:3031 / 3037
页数:7
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