Mediastinal masses: MR imaging.
Mediastinal masses: MR imaging.
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纵隔肿块：MR 成像。
DOI：
10.1148/radiology.158.2.3941855
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发表时间：
1986
期刊：
影响因子：
19.7
通讯作者：
Higgins,CB
中科院分区：
文献类型：
--
作者：
vonSchulthess,GK;McMurdo,K;Tscholakoff,D;deGeer,G;Gamsu,G;Higgins,CB
本文对75例纵隔肿块患者进行了磁共振成像。结果分析了MR显示肿块的能力，它们的形态，以及它们对血管和气道的侵占或移位。53例测定T1值，59例测定T2值。分别获得了53例和59例患者的氢密度和相对于肌肉和脂肪的造影剂百分比。MR图像与计算机断层扫描（CT）扫描进行了比较，其中45例患者可用。由于肿块和心血管结构之间的内在对比，MR描绘了所有肿块，并显示了血管和心腔的妥协。支气管源性癌在T1和T2有很长的松弛值，而慢性炎症过程在T1和T2有中间值，因此在T2加权图像上不如支气管源性癌那么强烈。其他肿瘤在两组间表现出T1和T2值。与CT扫描相比，磁共振图像上的肿块表现不均匀，MR能更好地评估血管损伤，因此，磁共振成像是一种完全无创的评估纵隔肿块的技术。虽然解剖信息与CT相当，但MR提供了一些关于肿块组成的见解。
Seventy-five patients with mediastinal masses were imaged with magnetic resonance (MR). Results were analyzed with regard to the ability of MR to demonstrate the masses, their morphology, and their encroachment or displacement of blood vessels and airways. T1 values were determined in 53 patients and T2 values in 59. Hydrogen density and percentage of contrast relative to muscle and fat were also obtained in 53 and 59 patients, respectively. MR images were compared with computed tomography (CT) scans, which were available in 45 patients. MR depicted all masses and demonstrated compromise of vessels and cardiac chambers owing to the inherent contrast between the masses and cardiovascular structures. Bronchogenic carcinoma had very long relaxation values for T1 and T2, while chronic inflammatory processes had intermediate values for T1 and T2, thus appearing less intense than bronchogenic carcinoma on T2-weighted images. Other neoplasms demonstrated T1 and T2 values between these two disease groups. Masses appeared less homogeneous on MR images than on CT scans, and vascular compromise was better assessed with MR. Thus, MR imaging is a completely noninvasive technique for the evaluation of mediastinal masses. While the anatomic information is comparable to that produced by CT, MR provides some insight into the composition of the mass.