采用超短TE脉冲序列的膝关节磁共振成像。
Magnetic resonance imaging of the knee with ultrashort TE pulse sequences.
作者信息
Gatehouse Peter D, Thomas Rhidian W, Robson Matthew D, Hamilton Gavin, Herlihy Amy H, Bydder Graeme M
机构信息
The Cardiac MR Unit, Royal Brompton Hospital, SW3 6NP London, UK.
出版信息
Magn Reson Imaging. 2004 Oct;22(8):1061-7. doi: 10.1016/j.mri.2004.08.018.
BACKGROUND
We wished to assess the feasibility of imaging the knee with ultrashort TE (UTE) pulse sequences.
SUBJECTS AND METHODS
Five volunteers and 16 patients were studied with UTE (TE=0.08 ms) sequences including later echoes. Conventional fat-suppressed images and difference images were also produced by subtracting a later echo from the first. Gadodiamide enhancement was used.
RESULTS
High signal was obtained in tendons, ligaments, menisci and periosteum. Normal contrast enhancement was seen in these structures. Deep and superficial layers were seen in the articular cartilage. Cartilage defects were identified. The red zone could be differentiated from the white zone of the meniscus. Meniscal tears and degeneration were observed with low signal on subtraction images. Enhancement was seen within the anterior and posterior cruciate ligaments and associated scar tissue.
CONCLUSION
Ultrashort TE imaging provides new options to visualize anatomy, manipulate conspicuity, observe contrast enhancement and demonstrate disease of the knee.
背景
我们希望评估使用超短回波时间（UTE）脉冲序列对膝关节进行成像的可行性。
受试者与方法
对5名志愿者和16名患者采用UTE（TE = 0.08毫秒）序列进行研究，包括后续回波。还通过从第一个回波中减去后续回波来生成常规脂肪抑制图像和差值图像。使用钆双胺增强。
结果
在肌腱、韧带、半月板和骨膜中获得高信号。在这些结构中可见正常的对比增强。在关节软骨中可见深层和浅层。识别出软骨缺损。半月板的红色区域可与白色区域区分开来。在差值图像上观察到半月板撕裂和退变呈低信号。在前交叉韧带和后交叉韧带以及相关瘢痕组织内可见增强。
结论
超短回波时间成像为可视化膝关节解剖结构、提高图像清晰度、观察对比增强以及显示膝关节疾病提供了新的选择。
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