目的探讨肺结核瘤MRI与CT检 查对比分析。方法 收集21例因肺内占位 就诊、经病理证实为结核瘤的MRI与CT 检查资料，MRI检查包括平扫、DWI及动 态增强扫描，CT检查包括平扫与增强扫 描；对两种检查方法的影像特点进行分 析。结果 肺部结核瘤21例病例T1WI全部 显示低信号，T2WI显示16例为周边高信 号，中央区低信号，5例为高信号。DWI 图像显示均为高信号或稍高信号，平均 ADC值为（1.60±0.18）s/mm2 。动态增强 扫描动脉期17病例边缘完全或不完全环 状强化，中央区无强化或轻度强化。时 间-强度曲线6例表现为缓慢流入型，4例 表现为缓慢流出型。CT平扫显示肺结核 瘤显示低密度，增强扫描轻度强化，其 中10例显示完全或不完全环状强化。时 间-密度曲线显示为6例为缓慢上升型，4 例为早期快速上升，缓慢下降型。结论 MRI与CT对肺结核瘤的诊断都具有重要价 值，MRI对于病变的薄环状强化的显示更 具有优越性，CT对钙化的检查具有优越 性。

Objective To investigate the MRI and CT diagnosis of pulmonary tuberculoma. Methods The CT and MRI imaging data of 21 cases of pulmonary tuberculoma which confirmed by pathology were collected.MRI imaging data included plain scan, DWI and dynamic contrast-enhanced scan, CT imaging data included plain scan and enhanced scan. Then the imaging features of both methods were analyzed. Results 21 cases of pulmonary tuberculoma performed hypointensity on T1WI, 16 cases performed hypointensity in the center and hyperintensity peripheral on T2WI, and 5 cases performed hyperintensity on T2WI. All cases performed hyperintensity or slightly hyperintensity on DWI image, with the average ADC value of (1.60 ± 0.18) s/mm2. A total of 17 lesions showed no enhancement or slight enhancement in the center and complete or incomplete ringlike enhancement peripheral at arterial phase of the contrast-enhanced scans. And 6 cases showed slow inflow type of the time-intensity curve, 4 were slow outflow type. All lesions performed low density on CT plain scan, and had slightly enhancement after enhanced, in which 10 cases performed complete or incomplete ringlike enhancement. And 6 cases showed slowly rise type of the time-density curve, 4 showed rapid rise at early stage and slow descending. Conclusion MRI and CT had great value in the diagnosis of pulmonary tuberculoma, MRI had advantages in displaying the ringlike enhancement of the lesion and CT displayed calcification better.