孤立性肺结节的多层螺旋CT表现

目的探讨孤立性肺结节的多层螺旋CT表现及鉴别诊断。方法回顾性分析35例经手术病理检查、肺穿刺活检及临床随访证实的孤立性肺结节的多层螺旋CT表现。35例均常规5mm层厚、1．5mm螺距扫描，其中17例行增强扫描，并采用骨算法及软组织算法1．5mm薄层重建。结果本组35例病例中，恶性病变23例，良性病变12例。恶性病变主要表现密度不均、深分叶、边缘细短毛刺、血管集束征、支气管气相和空泡征、胸膜凹陷征；而良性病灶大部分密度均匀、无或浅分叶、粗长毛刺、胸膜凹陷征、钙化等。结论多层螺旋CT诊断良恶性孤立性肺结节具有较高的准确性。

Multi-slice spiral CT features of solitary pulmonary nodules

Objective To evaluate the multislice spiral CT （MSCT） features and differential diagnosis of solitary pul monary nodules （SPN）. Methods A retrospective study of SPN of 35 cases, some cases with confirmed pathology by lung operation or lung puncture biopsy ,another cases with clinical followup confirmed SPN. All cases were scanned with slice width 5 mm,pitch .1.5 mm. Among them , 17 cases underwent dualphase scans and thin reconstruction of the images with bone algorithm and soft tissue algorithm. Results Of 35 cases, 23 cases were malignancy lesions, 12cases were benign lesions. Malignancy were characterized by uneven density, deep lobulated sign,thin short burr features, and the vascular convergence sign, Bronchial gas phase,vacuole sign and pleural indentation edge expres sion;on the contrary, benign lesions were characterized by uniform density, no or shallow lobulation, thick and long burr feature, pleural indentation and calcification expression. Conclusion There are higher accuracy In differentiating benign and malignant SPN with the multislice spiral CT.