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目的评价常规 MR 及动态增强扫描对于眼眶淋巴瘤的诊断价值。方法眼眶淋巴瘤共13例,其中 B 细胞型10例,T 细胞型1例,T-NK 细胞型1例,多发性骨髓瘤1例。13例均行常规 MR 检查,然后采用三维(3D)快速扰相梯度回波(FSPGR)序列进行动态增强扫描,对数据进行后处理后获得动态增强曲线和峰值时间(T_(peak))、最大上升斜率(Slope)、流出率(WR)、最大强化率(ER)等参数。结果 13例眼眶淋巴瘤中有11例发生于眼眶前部的眼睑、泪腺区,常包绕眼球生长,呈“铸形”改变,在 MRI 上10例呈等 T_1、等 T_2信号,增强扫描13例均呈中度强化。13例的动态增强曲线均为速升、速降型,T_(peak)值为(58.7±8.5)s,WR 值为(30.9±9.4)%。13例眼眶淋巴瘤中常规 MRI 正确诊断6例,常规 MRI 加动态增强扫描对13例均作出正确诊断。结论常规 MRI 结合动态增强扫描有利于眼眶淋巴瘤的定性诊断。
Objective To evaluate the diagnostic value of routine MR and dynamic contrast-enhanced ultrasound in orbital lymphoma. Methods There were 13 cases of orbital lymphoma, including 10 cases of B cell type, 1 case of T cell type, 1 case of T-NK cell type and 1 case of multiple myeloma. Thirteen patients underwent routine MR examinations, and then dynamic enhanced scanning was performed with three-dimensional (3D) fast spurious gradient echo (FSPGR) sequence. After the data was processed, the dynamic enhancement curve and peak time (T peak) Rising slope (Slope), outflow rate (WR), the maximum enhancement rate (ER) and other parameters. Results Eleven cases of orbital lymphoma occurred in the eyelid and lacrimal gland area in the anterior orbit of the eye and often grew around the eyeball. Scanned 13 cases were moderately enhanced. The dynamic enhancement curves of all 13 cases were ascending and descending. The peak value was (58.7 ± 8.5) s and the value of WR was (30.9 ± 9.4)%. Thirteen cases of orbital lymphoma routine MRI correct diagnosis of six cases, conventional MRI plus dynamic contrast-enhanced scan to make the correct diagnosis of 13 cases. Conclusion Conventional MRI combined with dynamic contrast-enhanced scan is helpful for the qualitative diagnosis of orbital lymphoma.