隐匿性肺癌及其纵隔转移的MRI诊断  

MRI Diagnosis of Occult Lung Cancer and Its Metastasis in Mediastinum

作　　者：虞登高 吕晓波 牛汝朴[2] 

机构地区：[1]临汾铁路医院,山西临汾市041000 [2]山西省人民医院,太原市030012

出　　处：《实用医学影像杂志》2001年第1期22-24,共3页Journal of Practical Medical Imaging

摘　　要：目的 确定隐匿性肺癌及其纵隔转移的ＭＲＩ信号特征，并评价ＭＲ技术的诊断准确性。方法１５例隐匿性肺癌患者均经 ＰＨＩＬＩＰＳ １．０ ＮＴ磁共振仪进行轴位Ｔ１、Ｔ２加权成像及冠状位Ｔ２加权成像，并包括Ｇｄ－ＤＴＰＡ增强扫描。ＭＲＩ诊断结果经病理证实。结果 １５例肺癌患者中，实性癌１４例（９３．３％），其 ＭＲＩ表现为略长Ｔ１、长Ｔ２信号；坏死囊性变者１例（６．７％），其ＭＲＩ表现为长Ｔ１、长Ｔ２信号。Ｇｄ－ＤＴＰＡ增强扫描后，增强明显者１０例，其中５例呈花环状增强。全部患者中被发现有纵隔转移者６例，经Ｇｄ－ＤＴＰＡ增强扫描，全部为增强表现。结论 由于纵隔血管的流空效应，ＭＲＩ对隐匿性肺癌及其纵隔转移具有高度的诊断准确性。Objective To determine MRI signal features of occult lung cancer and its metastasis in mediastinum, and to assess the diagnostic accuracy of MR technique. Methods Fifteen patients with occult lung cancer underwent T1. T2 weighted MR imaging in the axial plane and T2 weighted MR imaging in the coronal plane befor and after bolus injection of Gd - DTPA on PHILIPS 1. 0 NT MR scanner. The diagnostic results of MRI were proved by pathology. Results Of all patients, solid cancer was found in 14 patients (93.3%) in which MRI findings were slightly hypointensity on T1WI and hyperintensity on T2WI while cystiform change was found only in one patient (6.7% ) in which MRI findings were hy- pointensity on T1WI and hyperintensity on T2WI. Following Cd - DTPA enhancement, there were significant enhancement in 10 patients, of them, 5 patients had MRI findings like as nor - cyclographic enhancement. However, in six patients who com- panied with mediastinal metastases, MRI findings after Gd - DTPA enhancement all were enhanced. Conclusion Due to flow - vocuum effect of mediastinal vessels, MR technique has very high accuracy for diagnosing occult lung cancer and its metastases in mediastinum.

关 键 词：纵隔转移 隐匿性 MRI诊断 T2加权成像 诊断准确性 MRI表现 增强扫描 DTPA 肺癌患者 坏死囊性变 信号特征 MR技术 磁共振仪 病理证实 诊断结果 T2信号 增强表现 流空效应 冠状位 Gd 

分 类 号：R445.2[医药卫生—影像医学与核医学]