FIG 3. Averaging of several single-shot images allows improved SNR and/or smaller FOV. Averaged transverse sections with a thickness of 10 mm and an FOV of 175 x 350 mm (matrix 96 x 256) from eight single-shot scans in a 28-year-old volunteer. The entire measuring time for one set of images was about 45 s (using a TR of 6 s). Centric reordering and recording of the entire matrix as in figure 1C were applied.

A, TE = 112; no diffusion sensitivity. SNR of brain is 22.

B, TE = 112; diffusion preparation with a b value of 250 s/mm². SNR of brain is 15.

C, TE = 128; no diffusion sensitivity.

D, TE = 128; diffusion preparation with a b value of 500 s/mm².

E, TE = 148; no diffusion sensitivity. SNR of brain is 15.

F, TE = 148; diffusion preparation with a b value of 1000 s/mm². SNR of brain is 3.3.