Abstract
Proton spin-lattice ( T 1) relaxation time images were computed from a data set of 32 gradiet-echo images acquired with a fast TOMROP ( T One by Multiple Read Out Pulses) sequence using a standard whole-body MR imager operating at 64 MHz. The data acquisition and analysis method which permits accurate pixel-by-pixel estimation of T 1 relaxation times is described. As an example, the T 1 parameter image of a human brain is shown demonstrating an excellent image quality. For white and gray brain matter, the measured longitudinal relaxation processes are adequately described by a single-component least-squares fit, while more than one proton component has to be considered for fatty tissue. A quantitative analysis yielded T 1 values of 547 ± 36 msec and 944 ± 73 msec for white and gray matter, respectively.
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