Three-dimensional projection imaging with half the number of projections

Fernando E. Boada, James D. Christensen, Joseph S. Gillen, Keith R. Thulborn

Research output: Contribution to journalArticlepeer-review

Abstract

This study demonstrates a sampling scheme for three-dimensional projection imaging with half the number of projections. The angular distribution of projections is designed so that the oversampling of the low spatial frequencies, in tandem with a partial Fourier algorithm, can be used to recreate purposely missing projections. The performance of the sampling scheme and its associated reconstruction algorithm are illustrated with computer-simulated as well as experimental data sets. We find that this technique produces images of comparable quality to the conventional projection imaging scheme. Although a 30% loss of signal-to-noise ratio (SNR) results from its use, the algorithm should prove useful for applications where robustness against motion artifacts and reduced T2* signal loss are desired.

Original languageEnglish (US)
Pages (from-to)470-477
Number of pages8
JournalMagnetic resonance in medicine
Volume37
Issue number3
DOIs
StatePublished - Mar 1997
Externally publishedYes

Keywords

  • image reconstruction
  • partial k-space
  • projection imaging

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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