Rapid local rectangular views and magnifications: Reduced phase encoding of orthogonally excited spin echoes

Thomas E. Conturo, Ronald R. Price, Albert H. Beth

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

A method is described for rapid, artifact‐free imaging and magnification of small regions within a larger sample. This combines a rectangular window, reconstructed from a reduced number of phase‐encoding steps, and confinement of spin echoes to a similar rectangular strip by orthogonal π/2 and π excitations. Phase encoding is along the width of the strip (along Y). Off‐center strips are excited by offsetting the Y slice‐selecting gradient, and the reconstruction window is kept coincident with excitation by similarly offsetting the Y phase‐encoding gradient. The excited strip is centered in the reconstruction window by setting the radiofrequency transmitter on resonance. The method is shown to be useful for long narrow structures such as the spine where the acquisition time is reduced by over a factor of 5 determined by the image aspect ratio. © 1988 Academic Press, Inc.

Original languageEnglish
Pages (from-to)418-429
Number of pages12
JournalMagnetic resonance in medicine
Volume6
Issue number4
DOIs
StatePublished - Apr 1988

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