CLINICAL USE OF THE PARTIAL SATURATION AND SATURATION RECOVERY SEQUENCES IN MR IMAGING
CLINICAL USE OF THE PARTIAL SATURATION AND SATURATION RECOVERY SEQUENCES IN MR IMAGING
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DOI：
10.1097/00004728-198511000-00004
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发表时间：
1985-01-01
影响因子：
1.3
通讯作者：
YOUNG, IR
中科院分区：
文献类型：
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作者：
BYDDER, GM;YOUNG, IR
部分饱和度（PS）（90 °-数据收集）和饱和恢复（SR）[（90 °-移相）n-90 °-数据收集]序列。PS序列的早期数据收集在显示具有短T2的组织如关节软骨和纤维环方面具有价值。PS序列还突出显示血流，这可以提供血管病变的特定信息。适当选择回波时间可以在正常组织（如乳腺和骨髓）以及各种疾病（如骨髓浸润、胰腺炎和肝脏脂肪浸润（其中存在混合脂质和水））中观察到化学位移效应。SR序列可用于控制流动效应以及计算T1值。尽管PS和SR序列显示的T1和T2依赖性对比度低于传统的高度T1和T2依赖性反转恢复和自旋回波序列，但当对比度形成机制是质子密度变化、化学位移效应、流动效应或短T2组织成分检测时，它们仍具有临床价值。
The partial saturation (PS) (90.degree.-data collection) and saturation recovery (SR) [(90.degree.-dephase)n-90.degree.-data collection] sequences are described. The early data collection of the PS sequence is of value in demonstrating tissues with a short T2 such as articular cartilage and the annulus fibrosus. The PS sequence also highlights flow and this may provide specific information in vascular lesions. Appropriate choice of echo time enables chemical shift effects to be seen in normal tissues such as breast and bone marrow as well as a variety of diseases such as bone marrow infiltration, pancreatitis, and fatty infiltration of the liver in which there is mixed lipid and water. The SR sequence can be used to control flow effects as well as to calculate values of T1. Although PS and SR sequences display less T1 and T2 dependent contrast than conventional highly T1 and T2 dependent inversion recovery and spin echo sequences, they may still be of clinical value when the mechanism of contrast formation is change in proton density, chemical shift effects, flow effects, or detection of short T2 tissue components.