肝脏病变检测：1.5T场强下激发性扰相脂肪抑制与常规自旋回波的比较

Liver lesion detection: comparison between excitation-spoiling fat suppression and regular spin-echo at 1.5T.

作者信息

Semelka R C, Hricak H, Bis K G, Werthmuller W C, Higgins C B

机构信息

Department of Radiology, St. Boniface General Hospital, University of Manitoba Teaching Hospital, Winnipeg, Canada.

出版信息

Abdom Imaging. 1993;18(1):56-60. doi: 10.1007/BF00201703.

DOI:10.1007/BF00201703

PMID:8431695

Abstract

The role of excitation-spoiling fat suppression (fatsat) imaging in the detection of liver lesions was assessed comparing short TR/TE and lont TR/TE spin-echo (SE) sequences with and without excitation-spoiling fat suppression in 25 patients at 1.5T. The study included patients with liver metastases (n = 21), primary liver cancer (n = 3), and hepatic adenoma (n = 1). Liver lesion detection and lesion-liver signal-to-noise ratios (SNR) were determined for the various imaging sequences in a prospective fashion. Liver lesion-liver SNR were highest for long TR/TE (2000-2500/70-80) fatsat images (12.7 +/- 4.8) compared to long TR/TE regular SE (2000-2500/70-80) images (8.8 +/- 5.6) [(p = ns) (not significant)], short TR/TE (200-400/15-20) fatsat images (-6.2 +/- 4.8) (p = 0.05), and short TR/TE regular SE images (-4.9 +/- 3.2) (p < 0.01). Lesion detection was greatest for long TR/TE fatsat (86) followed by long TR/TE regular SE (78) (p = 0.05), short TR/TE fatsat (65) (p < 0.01), and short TR/TE regular SE (60) (p < 0.01). The results of this study suggest that excitation-spoiling fat suppression may improve liver lesion detection and conspicuity.

摘要

在1.5T场强下，对25例患者进行研究，比较了有和没有激励去脂脂肪抑制的短TR/TE和长TR/TE自旋回波（SE）序列，以评估激励去脂脂肪抑制（fatsat）成像在肝脏病变检测中的作用。该研究纳入了肝转移瘤患者（n = 21）、原发性肝癌患者（n = 3）和肝腺瘤患者（n = 1）。以前瞻性方式确定了各种成像序列的肝脏病变检测情况以及病变与肝脏的信噪比（SNR）。与长TR/TE常规SE（2000 - 2500/70 - 80）图像（8.8 ± 5.6）[（p = ns）（无显著性差异）]、短TR/TE（200 - 400/15 - 20）脂肪抑制图像（-6.2 ± 4.8）（p = 0.05）和短TR/TE常规SE图像（-4.9 ± 3.2）（p < 0.01）相比，长TR/TE（2000 - 2500/70 - 80）脂肪抑制图像的病变与肝脏SNR最高（12.7 ± 4.8）。病变检测率最高的是长TR/TE脂肪抑制（86），其次是长TR/TE常规SE（78）（p = 0.05）、短TR/TE脂肪抑制（65）（p < 0.01）和短TR/TE常规SE（60）（p < 0.01）。本研究结果表明，激励去脂脂肪抑制可能会改善肝脏病变的检测及清晰度。