Radiology, Vol 156, 743-747, Copyright © 1985 by Radiological Society of North America
Inner volume MR imaging: technical concepts and their application
DA Feinberg, JC Hoenninger, LE Crooks, L Kaufman, JC Watts and M Arakawa
Although cross-sectional magnetic resonance examination of the head and
body is useful for screening large regions of tissue, subsectional regions
of the head and body often need to be examined. Orthogonally directed,
selectively irradiated planes with different flip angles produce a
spatially limited signal region from which two- or three- dimensional
volume images can be reconstructed. Images with limited fields-of-view can
be acquired in reduced imaging time. We present a general description of
this technique. These subsectional or "inner volume" images eliminate
respiratory motion artifacts by excluding moving tissues from the imaged
volume. A result of this technique is a high signal from rapid pulsatile
blood flow, produced without cardiac gating the pulse sequence.
