颈动脉体瘤的MRI和MRA表现

目的 探讨颈动脉体瘤的ＭＲＩ及ＭＲＡ表现。材料与方法 １３例１５个颈动脉体瘤术前ＳＥＴ１ＷＩ检查，其中行２ＤＴＯＦ ＭＲＡ检查者１２个，ＳＥＴ１ＷＩ增强检查者１０个。结论 １５个颈动脉体瘤均位于颈动脉分叉水平，１３个骑跨于颈动脉分叉（８６．６６％）。Ｔ１ＷＩ表现为等或略高信号，Ｔ２ＷＩ表现为混合高信号。ＳＥＴ１Ｗ１３个肿块内可见流空信号（８６．６６％），ＦＳＥ Ｔ２ＷＩ均可见流空信号（１００％）。

MRI and MRA Features of Carotid Body Tumor

Objective To study MRI and MRA findings of carotid body tumor (CBT).Materials and Methods 15 CBTs were scanned with SE T 1WI and FSE T 2WI sequences, 12 of them had additional 2D TOF MRA and 10 had additional gadoliniumenhanced MRI.Results All 15 CBTs were located at the level of carotid artery bifurcation, with 13 of them riding right on the bifurcation. All lesions showed isointensity or slightlyhighintensity signal on T 1WI, and uneven highintensity signal on T 2WI. Signal loss due to flow void was seen in 13 CBTs on SE T 1WI (86.66%) and in 15 CBTs on FSE T 2WI(100%). Capsule was demonstrated in 14 CBTs, presenting as lowintensity around the tumor. Of 12 MRA, 9 showed enlarged carotid bifurcation and 4 revealed CBT feeding vessels. All 10 CBTs were enhanced significantly after gadolinium administration.Conclusion CBTs have characteristic MRI and MRA findings. MRI and MRA are safe and reliable diagnostic examination for CBT.