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Fig. 1I. —27-year-old healthy male volunteer. Transverse diffusion-weighted MR
images of abdomen obtained at same level with three single-shot echo-planar
imaging sequences without contrast injection: conventional diffusion (b = 0
sec/mm2 [A]), conventional diffusion with parallel imaging
(b = 0 sec/mm2 [B]), diffusion tensor with parallel imaging
(b = 0 sec/mm2 [C]), conventional diffusion (b = 500
sec/mm2 [D]), conventional diffusion with parallel imaging
(b = 500 sec/mm2 [E]), diffusion tensor with parallel
imaging (b = 500 sec/mm2 [F]), and corresponding apparent
diffusion coefficient (ADC) maps [G–I]. More signal is noted on
diffusion tensor image for b value of 500 sec/mm2 (F) than
on conventional diffusion images without (D) and with (E)
parallel imaging. Background noise is suppressed with parallel imaging.
Hepatic ADC (x 10–3 mm2/sec) was (mean
± SD) 1.8 ± 0.4 (conventional diffusion), 1.7 ± 0.4
(conventional diffusion with parallel imaging), and 1.9 ± 0.3
(diffusion tensor with parallel imaging).
