目的 探讨腮腺基底细胞腺瘤的 CT表现特点及CT值量化指标，以提高对该 病的影像诊断水平。方法 回顾性分析经 病理证实的22例腮腺基底细胞腺瘤的双 期增强CT的表现,对肿瘤部位、数目、大 小、形态、CT密度、强化模式及CT值量化 指标等进行分析。结果 22例腮腺基底细 胞腺瘤病例均为单侧单发，16例位于腮腺 浅叶，2例跨浅、深叶，4例位于腮腺深 叶；肿瘤最大截面横径为0.5-5.5cm；大 多呈椭圆形、类圆形软组织肿块，边界清 楚，17例(17/22)肿块内见囊变区，其中 1例(1/17)见钙化灶。所有病例在双期CT 增强均有强化，动脉早期强化较明显、 CT值为(104.7±15.3)Hu，最大强化率为 152.3％，动脉晚期(近动静脉交界期)CT 值为(118.7±13.8)Hu；基底细胞腺瘤至 少有两种强化模式：一是动脉早期明显强 化，动脉晚期持续强化；二是动脉早期显 著强化，动脉晚期强化幅度有所减退，同 时与其相关病理进行比较分析,具有一定 的特点。结论 腮腺基底细胞腺瘤有一定 特征性的CT表现，结合病史、临床表现， 有助于正确诊断。

Objective To explore the CT findings of basal cell adenoma in the parotid gland and CT quantitative diagnosis index and improve the diagnostic accuracy. Methods The Dual-phase enhanced CT findings of 22 patients with pathologically proved BCA were analyzed retrospectively，CT images were evaluated in relation to the following:location, number, size,morphology,CT density, enhancement pattern andCT quantitative diagnostic index. Results 22 cases of parotid basal cell adenoma cases were unilateral and solitary,16 cases were located in the superficial lobe of parotid gland, 2 cases involved both superficial and deep lobe, 4 cases in the deep lobe of the parotid gland tumor;The maximum section of transverse diameter of 0.5 to 5.5 cm; The lesions were mostly oval, round soft tissue mass with clear boundary, cystic masses in 17 cases ,calcificationin in 1 case. All patients in the dual-phase contrast enhanced CT were enhanced markedly, On edrly arterial phase，the CT enhanced value was (104.7±15.3)Hu, the maximum enhanced ratio was 152.3％, in later arterial phase(near arteriovenous junction phase), the CT enhanced value was (118.7±13.8)Hu.Basal cell adenoma of at least two enhanced modes: one is that the enhancement were obvious in early arterial phase, in later arterial phase enforcement continued to strengthen; secondly that the enhancement enhanced significantly in early arterial phase,the enhancement were receded in later arterial phase, at the same peroid there were some certain characteristics as the corresponding pathology were comparatively analyzed. Conclusion Basal cell adenoma of the parotid gland with CT had some characteristic, combining with the clinical history, manifestations, is helpful to the diagnosis and differential diagnosis.