摘要
目的：探讨颈部淋巴结病变DWI检查的可行性，并重点研究影响DWI图像质量的技术参数。方法：使用GE1．5T磁共振扫描仪及颈部相控阵线圈对30例单侧或双侧颈部淋巴结肿大患者行常规sE序列扫描，其中16例为恶性肿瘤，14例为良性病变，均经手术及病理证实。全部病例使用体线圈行SE-EPI DWI序列扫描，采用全方位扩散梯度及6个b值扫描。DWI扫描时间40—52s。结果：在DWI序列扫描中，恶性淋巴结和反应性增生性淋巴结均呈高信号，计算ADC值可以鉴别良性和恶性淋巴结，通过各种扫描参数的合理匹配，可使图像的信噪比达到最佳，并减少图像的几何变形。结论：DWI对于鉴别颈部良恶性淋巴结病变是一种快速可行并行之有效的技术，具有一定的临床价值。
Objective：This article is to investigate the potential of DWI in cervical lymph node lesions and focus on the technique parameters that affect the quality of DW imaging.Methods： Conventional MR imaging（spin echo T1WI,T2WI and STIR） was used to scan 30 patients with histologically proven malignant tumors（16） and inflammatory lesions（14） on a GE 1.5T scanner using cervical phased array coil. Six B values（30 cases） were acquired with diffusion gradients applied in all three orthogona/directions using body coil. Difflusion scan time was 40 - 52 seconds. Results： All benign and malignant lymph nodes were visible in DWI and showed significant hyperintensity signal. Calculated ADC malignant lymph nodes was statistically different from that of benign lymph nodes. When various of scan parameters were mixed rationally, MRI may improve signal-noise-ratio of image quality and lessen geometric malformation. Conclusion： Diffusion weighted imaging is a rapid and feasible method in detecting cervical lymph node lesions and shows a potential for distinguishing between benign and malignant lymph nodes.
出处
《医学影像学杂志》
2006年第9期963-966,共4页
Journal of Medical Imaging
关键词
淋巴结病变
磁共振成像
扩散加权成像
Lymph node lesion
Magnetic resonance imaging
Diffusion weighted imaging
