CTA与MRA在颈动脉体瘤中的诊断价值

目的：研究MRA与CTA在诊断颈动脉体瘤中的价值，从而指导临床手术。方法：本文14例颈动脉体瘤全部经手术病理证实，其中单侧10例，双侧4例。回顾性分析颈动脉体瘤的CTA与MRA影像学表现及特征。结果：两种检查均可显示肿瘤部位、大小及形态，14例均行CTA检查，CT增强显示病灶为富血供肿瘤，其中12例肿瘤均匀强化，2例呈明显不均匀强化，CT值达150～180HU，颈内、外动脉密度与瘤体等同难以分辨，术前CT正确诊断率为100％（14／14）。11例患者行MRI及MRA检查，MBI平扫特点为瘤内见流空的血管影像，明确显示颈内、外动脉分离和紧贴或镶嵌在肿瘤后外缘及前外缘，MRA能良好显示肿瘤与颈总动脉及其分叉的关系，术前MR／正确诊断率为100％（11／11）。结论：CTA和MILA对颈动脉体瘤均有很高的诊断价值，经统计无显著性差异。

The value of CTA and MRA in the diagnosis of carotid body tumors

Objective：To study the value of CTA and MRA in the diagnosis of carotid body tumors. Methods： 14 cases of CBT were verified by pathology, 10 unilateral cases and 4 bilateral eases. The radiological image manifestations of CBT were analyzed retrospectively. Results：Each imaging examination was able to locate and highliglit the physical shape of CBT. The specific sonogram of CBT was isoechoie or hypoechoic solid lesion, small tubular areas could be seen in masses measured over 3 em in diameter, but the upper borderline of the tumor appeared indistinctive. 14 cases were examined by helical CT enhancement, which reflected the vascular nature of CBT, in 12 eases file tumor could not be distinguished from the internal and the external carotid arteries because they were evenly enhanced and 2 eases were unevenly enhanced. The values of CT was 150 - 180 HU. The correct rate for preoperatiove diagnosis was 100% （14/14）. 11 cases were examined with MPd and MRA. MRI imaging of CBT featured flow-void tumor vessels, and internal and external carotid arteries attached to or embedded respectively in the rear and the front of the external side of masses. MRA showed clearly the distinction between CBT and common carotid arteries and their branches. The rate of correct diagnosis was 100% （11/11）. Conclusion： CTA and MRA are valuable and specific in diagnosis of CBT. There are no significant statistics difference in 2 kinds of imaging diagnostic methods.