Practical Implementation and Optimization of One‐shot T1 imaging

Magnetic Resonance in Medicine - Tập 22 Số 2 - Trang 414-424 - 1991
I Kay1, R. Mark Henkelman2
1Department of Medical Biophysics, University of Toronto, Ontario, Canada
2Department of Medical Biophysics, University of Toronto, and Sunnybrook Health Science Centre, 2075 Bayview Avenue, Toronto, Ontario, Canada M4N 3M5

Tóm tắt

AbstractLongitudinal relaxation times (T1) can be measured rapidly in an imaging context using a “one‐shot” method based on the pulse sequence originally proposed by D. C. Look and D. R. Locker (Rev. Sci. Instrum. 41, 250 1970). This sequence is significantly faster than either repeated inversion recovery or repeated saturation recovery methods. The method uses a 180° inversion pulse followed by multiple small‐angle α pulses that sample the longitudinal magnetization during its recovery. Choices of inversion pulse, tip angle, and time intervals are discussed for optimal clinical use. We can produce 29 images sampling the full T1 recovery curve with a 256 × 256 resolution in about 10 min. From this data, T1 images can be calculated with a precision of 10%. © 1991 Academic Press, Inc.

Từ khóa


Tài liệu tham khảo

10.1126/science.171.3976.1151

Hollis D. P., 1973, Cancer Res., 33, 2153

Macfall J. R., 1984, Techniques of Nuclear Magnetic Resonance

10.1088/0031-9155/28/6/012

10.1002/mrm.1910010307

10.1097/00004728-198601000-00022

10.1002/mrm.1910030119

10.1002/mrm.1910020205

Weiss G. H., 1985, J. Magn. Reson., 61, 499

10.1002/mrm.1910050502

B.Kiefer M.Deimiling andD.Finelli in “Proceedings. 8th Annual Meeting Society of Magnetic Resonance in Medicine 1989.”

10.1002/mrm.1910130109

10.1088/0031-9155/31/2/001

Stfhling M. K., 1990, Magn. Reson. Med., 13, 515

10.1063/1.1684482

R.Graumann M.Deimling T.Heilmann andA.Oppelt in“SMRM 5th Annual Meeting Book of Abstracts ” p.922 1986.

Graumann R., 1987, Electromedica, 55

10.1118/1.596206

10.1002/mrm.1910070104

10.1016/0022-2364(84)90181-1

10.1016/0022-2364(88)90131-X

10.1103/PhysRevA.31.2753

10.1118/1.596373

Press W. H., 1989, Numerical Recipes: The Art of Scientific Computing

10.1002/mrm.1910090113

Leipert T. K., 1976, J. Magn. Res., 24, 181

10.1063/1.432601

10.1016/S0006-3495(76)85660-3

Thông tin
Thông tin xuất bản

Magnetic Resonance in Medicine

Tập 22 Số 2

414-424

Thông tin tác giả