Assertion: scanner's field | /r/HasProperty | gradient
Facets:
Source sentences:
text: By applying additional magnetic fields (gradients) that vary linearly over space, specific slices to be imaged can be selected, and an image is obtained by taking the 2-D Fourier transform of the spatial frequencies of the signal (k-space).
text: Since the additional field is a gradient, it has units of gauss per centimeter or millitesla per meter (mT/m).