头部和颈部 MRI 的最佳脂肪抑制：多点 Dixon 与 2 种不同的脂肪抑制技术（频谱预饱和和反转恢复、STIR）的比较。
Optimal Fat Suppression in Head and Neck MRI: Comparison of Multipoint Dixon with 2 Different Fat-Suppression Techniques, Spectral Presaturation and Inversion Recovery, and STIR.
机构信息
From the Departments of Neuroradiology (S.G.)
Radiology (S.G.), Rush University Medical Center, Chicago, Illinois.
出版信息
AJNR Am J Neuroradiol. 2018 Feb;39(2):362-368. doi: 10.3174/ajnr.A5483. Epub 2017 Dec 14.
BACKGROUND AND PURPOSE
Uniform complete fat suppression is essential for identification and characterization of most head and pathology. Our aim was to compare the multipoint Dixon turbo spin-echo fat-suppression technique with 2 different fat-suppression techniques, including a hybrid spectral presaturation with inversion recovery technique and an inversion recovery STIR technique, in head and neck fat-suppression MR imaging.
MATERIALS AND METHODS
Head and neck MR imaging datasets of 72 consecutive patients were retrospectively reviewed. All patients were divided into 2 groups based on the type of fat-suppression techniques used (group : STIR and spectral presaturation with inversion recovery gadolinium-T1WI; group : multipoint Dixon T2 TSE and multipoint Dixon gadolinium-T1WI TSE). Objective and subjective image quality and scan acquisition times were assessed and compared between multipoint Dixon T2 TSE versus STIR and multipoint Dixon gadolinium-T1WI TSE versus spectral presaturation with inversion recovery gadolinium-T1WI using the Mann-Whitney test.
RESULTS
A total of 64 patients were enrolled in the study (group A, = 33 and group B, = 31). Signal intensity ratios were significantly higher for multipoint Dixon T2 and gadolinium-T1WI techniques compared with STIR ( < .001) and spectral presaturation with inversion recovery gadolinium-T1WI ( < .001), respectively. Two independent blinded readers revealed that multipoint Dixon T2 and gadolinium-T1WI techniques had significantly higher overall image quality ( = .022 and < .001) and fat-suppression grades ( < .013 and < .001 across 3 different regions) than STIR and spectral presaturation with inversion recovery gadolinium-T1WI, respectively. The scan acquisition time was relatively short for the multipoint Dixon technique (2 minutes versus 4 minutes 56 seconds for the T2-weighted sequence and 2 minutes versus 3 minutes for the gadolinium-T1WI sequence).
CONCLUSIONS
The multipoint Dixon technique offers better image quality and uniform fat suppression at a shorter scan time compared with STIR and spectral presaturation with inversion recovery gadolinium-T1WI techniques.
背景与目的
均匀完全的脂肪抑制对于大多数头部和病理学的识别和特征描述至关重要。我们的目的是比较多点 Dixon 涡轮自旋回波脂肪抑制技术与 2 种不同的脂肪抑制技术，包括混合谱饱和反转恢复技术和反转恢复 STIR 技术，在头部和颈部脂肪抑制磁共振成像中的应用。
材料与方法
回顾性分析 72 例连续患者的头部和颈部磁共振成像数据集。所有患者根据所使用的脂肪抑制技术类型分为 2 组（组：STIR 和反转恢复钆增强 T1WI 的混合谱饱和；组：多点 Dixon T2 TSE 和多点 Dixon 钆增强 T1WI TSE）。使用 Mann-Whitney 检验评估并比较多点 Dixon T2 TSE 与 STIR 以及多点 Dixon 钆增强 T1WI TSE 与反转恢复钆增强 T1WI 的谱饱和之间的客观和主观图像质量以及扫描采集时间。
结果
共有 64 例患者入组研究（组 A， = 33 例；组 B， = 31 例）。与 STIR（ <.001）和反转恢复钆增强 T1WI 的谱饱和（ <.001）相比，多点 Dixon T2 和钆增强 T1WI 技术的信号强度比显著更高。2 位独立的盲法读者发现，多点 Dixon T2 和钆增强 T1WI 技术的整体图像质量（ =.022 和 <.001）和脂肪抑制等级（在 3 个不同区域分别为 <.013 和 <.001）均显著高于 STIR 和反转恢复钆增强 T1WI 的谱饱和。多点 Dixon 技术的扫描采集时间相对较短（T2 加权序列为 2 分钟对 4 分 56 秒，钆增强 T1WI 序列为 2 分钟对 3 分钟）。
结论
与 STIR 和反转恢复钆增强 T1WI 的谱饱和技术相比，多点 Dixon 技术在更短的扫描时间内提供了更好的图像质量和均匀的脂肪抑制。
Zotero 插件