泪腺炎性假瘤的MRI特征分析

发布时间：2018-03-26 12:15

  本文选题：泪腺　切入点：炎性假瘤　出处：《广东医学》2017年19期

【摘要】：目的探讨泪腺炎性假瘤的MRI特征,为临床早期诊断提供影像学依据。方法收集36例(46侧)经病理证实的泪腺炎性假瘤患者的MRI资料。所有患者均行MR平扫及增强MR扫描,其中24例行动态增强扫描,12例行扩散加权成像扫描。评估其常规MR表现,通过DCE-MR及DWI-MR图像后处理得到以下参数:达峰时间(Tpeak)、峰值强化指数(CIpeak)、最大强化率(ERmax)、流出率(WR)、时间-信号强度曲线(TIC)类型及表观弥散系数(ADC)值。结果 36例(46侧)泪腺炎性假瘤中,2例(2侧)累及泪腺睑部,3例(4侧)累及泪腺眶部,31例(41侧)睑部眶部均受累;2例(2侧)形态规则,均起自泪腺眶部,34例(44侧)形态不规则;14例(14侧)边界清晰,22例(32侧)边界模糊。T1WI呈等信号或略低信号;T2WI 28例(37侧)呈等或稍高信号,8例(9侧)呈略低信号,14例(18侧)T2WI信号欠均匀;11例(15侧)中度强化,25例(31侧)呈明显强化,其中8例(11侧)呈不均匀强化。泪腺炎性假瘤CIpeak为1.14±0.39,Tpeak为(81.5±42.6)s,ERmax为1.26±0.43,WR为(11.4±0.09)%。21例TIC中11例为Ⅰ型或Ⅱ型,7例为Ⅲ型,3例为IV型。ADC值为(0.74±0.28)×10~(-3)mm~2/s。结论 MRI可以清晰显示泪腺炎性假瘤的部位、形态、范围、边界,DCE-MRI及ADC值为其诊断及鉴别诊断提供辅助诊断依据。
[Abstract]:Objective to investigate the MRI features of lacrimal gland inflammatory pseudotumor and to provide imaging evidence for early clinical diagnosis. Methods the MRI data of 36 patients with lacrimal gland inflammatory pseudotumor confirmed by pathology were collected. In 24 cases, dynamic contrast-enhanced scan was performed in 12 cases, diffusion weighted imaging was performed in 12 cases. The following parameters were obtained by post-processing of DCE-MR and DWI-MR images: peak time, peak enhancement index, peak enhancement index, maximum enhancement rate, efflux rate, time-signal intensity curve and apparent diffusion coefficient. Results there were 36 cases (46 sides) with tears. In 2 cases of adenoinflammatory pseudotumor, 2 cases (2 sides) involved lacrimal gland eyelid in 3 cases (4 sides)) of lacrimal gland orbital region (31 cases (41 sides)) the orbital part of eyelid was involved in 2 cases (2 sides). All of them originated from the lacrimal gland orbital fissure in 34 cases (44 sides) and irregular shape in 14 cases (14 sides). The boundary was clearly defined in 22 cases (32 sides). The boundary was blurred on T 1WI or slightly low signal intensity on T 2WI in 28 cases (n = 37), with iso-or slightly hyperintense signal intensity in 8 sides (n = 9)) with slightly low signal intensity in 14 cases. In 18 cases of T2WI, the signal intensity was uneven in 11 cases (15 sides) and moderate enhancement was found in 25 cases (31 sides). The CIpeak of lacrimal gland inflammatory pseudotumor was 1.14 卤0.39 Tpeak: 1.26 卤0.43 WR = 11.4 卤0.09 WR of 21 cases of TIC, 11 cases were type 鈪，

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