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Clinical Use of the Partial Saturation and Saturation Recovery Sequences in MR Imaging

1985; Lippincott Williams & Wilkins; Volume: 9; Issue: 6 Linguagem: Inglês

10.1097/00004728-198511000-00004

1532-3145

Graeme M. Bydder, I. R. Young,

Lanthanide and Transition Metal Complexes

The partial saturation (PS) (90°-data collection) and saturation recovery (SR) [(90o-dephase)n-90°-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 How effects as well as to calculate values of Tl. Although PS and SR sequences display less TI and T2 dependent contrast than conventional highly Tl 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. How effects, or detection of short T2 tissue components.