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Investigation of Partial Flip Angle Magnetic Resonance Imaging

1986; Institute of Electrical and Electronics Engineers; Volume: 33; Issue: 1 Linguagem: Inglês

10.1109/tns.1986.4337151

1558-1578

Timothy C. Mills, Douglas A. Ortendahl, Nola M. Hylton,

Advanced NMR Techniques and Applications

For magnetic resonance imaging (MRI) of the head a TR of about 2.0 seconds has been found to give excellent sensitivity to desease. If a flip angle less than 90/sup 0/ is used for initial excitation, it is possible to maintain sensitivity to disease while reducing TR and thus total imaging time. Simulations based on data from patients with representative pathology show that image contrast is preserved. By acquiring sequences at TR = 0.5 seconds with two different flip angles it is possible to calculate T1 with good accuracy, thus allowing calculated images at arbitrary TR to be produced.