Evaluation of magnetic resonance sequences in imaging mediastinal tumors.
Evaluation of magnetic resonance sequences in imaging mediastinal tumors.
复制标题
纵隔肿瘤成像中磁共振序列的评估。
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
E. Moore
中科院分区：
文献类型：
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作者：
W. Webb;G. Gamsu;D. Stark;KL Moon;E. Moore
使用 2 到 4 个成像序列对 10 名患有纵隔肿瘤的患者进行了磁共振成像 (MRI) 研究。七名患有支气管癌，三名患有良性病变。这些序列包括重复时间 (TR) 值为 0.5、1.0 和 2.0 秒、回波时间 (TE) 值为 28 和 56 毫秒的自旋回波技术，以及反转恢复技术。对不同成像序列的纵隔肿块和纵隔脂肪的信号强度比（图像对比度的衡量标准）进行了比较。还测量了相对于纵隔脂肪和纵隔质量的信噪比。对于自旋回波成像，降低 TR 值会导致所有患者的质量/脂肪对比度增加，从而使肿块更容易检测到，但这也导致信噪比降低。由于来自质量的信号相对减少，使用所使用的序列的反转恢复成像导致质量/脂肪对比度大大增加。然而，在使用这种技术研究的四名患者中，有两名患者的肿块强度如此之低，以至于无法与气管或纵隔血管区分开来，而在这四名患者中，其中一名也看不见肺结节。具有短 TR 值和长 TR 值的自旋回波成像可提供良好的组织对比度和良好的信噪比。
Ten patients having a mediastinal tumor were studied with magnetic resonance imaging (MRI) using from two to four imaging sequences. Seven had bronchial carcinoma and three had benign lesions. The sequences included the spin-echo technique with repetition time (TR) values of 0.5, 1.0, and 2.0 sec and echo time (TE) values of 28 and 56 msec, and the inversion-recovery technique. The signal-intensity ratios of the mediastinal mass and mediastinal fat, which are a measure of image contrast, were compared for the different imaging sequences. Also signal-to-noise ratios were measured relative to both mediastinal fat and mediastinal mass. With spin-echo imaging, decreasing the TR value resulted in an increase in mass/fat contrast in all patients, making the masses easier to detect, but this also resulted in decreased signal-to-noise ratios. Inversion-recovery imaging with the sequence used resulted in a greatly increased mass/fat contrast, because of a relative decrease in signal from the mass. However, in two of four patients studied with this technique, the mass was so low in intensity that it could not be distinguished from the trachea or mediastinal vessels, and in one of these four, a lung nodule was also invisible. Spin-echo imaging with both short and long TR values provides good tissue contrast and good signal-to-noise ratios.
影响因子：
19.7
作者：
Gamsu,G;Webb,WR;Sheldon,P;Kaufman,L;Crooks,LE;Birnberg,FA;Goodman,P;Hinchcliffe,WA;Hedgecock,M
通讯作者：
Hedgecock,M
异常活体大鼠的核磁共振成像及其与组织特征的相关性。
影响因子：
19.7
作者：
Herfkens,R;Davis,P;Crooks,L;Kaufman,L;Price,D;Miller,T;Margulis,AR;Watts,J;Hoenninger,J;Arakawa,M;McRee,R
通讯作者：
McRee,R