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肝脏中体内1H磁共振波谱的评估:综述

Assessment of in vivo 1H magnetic resonance spectroscopy in the liver: a review.

作者信息

Fischbach Frank, Bruhn Harald

机构信息

Department of Radiology and Nuclear Medicine, Medical School, Otto von Guenicke University, Magdeburg, Germany.

出版信息

Liver Int. 2008 Mar;28(3):297-307. doi: 10.1111/j.1478-3231.2007.01647.x.

Abstract

With increased availability of magnetic resonance (MR) systems at ultra-high field strength for clinical studies, other organs besides the brain have received renewed consideration for MR spectroscopy (MRS). Because signal-to-noise ratio and chemical shift increase proportional to the static magnetic field, a concomitant increase in signal intensity and spectral resolution of metabolite resonances can be exploited. Improved resolution of adjacent metabolite peaks would not only provide for more accuracy of metabolite identification but also metabolite quantification. While the superiority of high-field imaging and spectroscopy has already been demonstrated clearly in the brain, this article reviewed issues around 1H MRS of the liver. These include optimization strategies such as coil technology, minimizing of motion artefacts using breath-holding and postprocessing of the spectra. Moreover, we reviewed the pertinent experience hitherto reported in the literature on potential clinical issues where liver MRS may be useful. These included determination and characterization of liver fat content, liver tumours and focal lesions. While these applications have been used experimentally, liver MRS does not yet have a clearly defined role in the clinical management of any disease state. Accordingly, it remains primarily a research modality to date.

摘要

随着用于临床研究的超高场强磁共振(MR)系统的可用性增加,除大脑外的其他器官已重新受到磁共振波谱(MRS)研究的关注。由于信噪比和化学位移与静磁场成正比增加,因此可以利用代谢物共振信号强度和光谱分辨率的相应增加。相邻代谢物峰分辨率的提高不仅将提高代谢物鉴定的准确性,还将提高代谢物定量的准确性。虽然高场成像和波谱的优势已在大脑中得到明确证明,但本文回顾了有关肝脏氢质子磁共振波谱(1H MRS)的相关问题。这些问题包括优化策略,如线圈技术、使用屏气减少运动伪影以及光谱的后处理。此外,我们回顾了迄今文献中报道的有关肝脏MRS可能有用的潜在临床问题的相关经验。这些问题包括肝脏脂肪含量、肝脏肿瘤和局灶性病变的测定和特征描述。虽然这些应用已用于实验,但肝脏MRS在任何疾病状态的临床管理中尚未有明确界定的作用。因此,迄今为止它主要仍是一种研究手段。

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