A technique, which produces a 3 dimensional image of an object. The advantage of this approach is that the signal, acquired from the entire volume has an increased
SNR. 'Slices' are defined by a
second phase encoded axis, which divides the volume into 'partitions'.
There is no gap between the slices in 3D
volume imaging, therefore thin slices are possible. The Gz
phase encoding gradient is set for several slices in one. But 3D takes more time with thin slices because of this
phase encoding gradient. With conventional thin
slice imaging, the
SNR is poor, with 3D
volume imaging this is not the case because the
slab (volume) is responsible for
SNR.