Effect of increased repetition time TR on precision of inversion-recovery T(1) measurements.
The effect of increased repetition time, TR, on the precision of inversion-recovery measurements of the spin-lattice relaxation time, T(1), was calculated theoretically, simulated numerically, and measured experimentally. All three methods yielded similar results. With constant inversion times, the T(1) precision was independent of TR. Therefore, 1) multiple-slice inversion-recovery fast-spin-echo T(1) maps should be made one slice at a time, not with interleaved acquisition, and 2) once the longest inversion time t(i) has been set, TR should be set just enough longer than the longest t(i) to allow data acquisition.
Kingsley
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PB
Department of Radiology, North Shore University Hospital, 300 Community Drive, Manhasset, NY 11030, USA. kingsley@nshs.edu
Monahan
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WG
D001921:Brain / Q000473:pathology*; D003198:Computer Simulation; D005583:Fourier Analysis; D006801:Humans; D007089:Image Enhancement; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D009716:Numerical Analysis, Computer-Assisted