Reducing temporal fluctuations in MRI with the multi-channel method SENSE

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Multi-channel acquisition is employed in MRI to decrease total imaging time. In this paper, artifact free images are calculated by utilizing the difference in spatial encoding of the MR signal from neighboring channels. The encoding functions are estimated in the presence of noise and motion. For fMRI studies, the temporal stability of the signal is essential, since neuronal activity in the brain is detected by probing subtle BOLD (blood oxygen level dependent) signal changes. To ensure artifact free noise representation a new type of weight is used. By effectively selecting and eliminating low SNR pixels, increased temporal stability is achieved. Using the parallel imaging method SENSE the proposed method is tested with in-vivo data to ensure noise suppression and demonstrate correct assignment of fMRI activation.

Original languageEnglish (US)
Title of host publicationMedical Imaging 2006
Subtitle of host publicationPhysics of Medical Imaging
DOIs
StatePublished - Jun 30 2006
EventMedical Imaging 2006: Physics of Medical Imaging - San Diego, CA, United States
Duration: Feb 12 2006Feb 16 2006

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume6142 I
ISSN (Print)1605-7422

Conference

ConferenceMedical Imaging 2006: Physics of Medical Imaging
Country/TerritoryUnited States
CitySan Diego, CA
Period2/12/062/16/06

Keywords

  • Multi-channel reconstruction
  • Temporal noise reduction

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