AUTO-SMASH: A self-calibrating technique for SMASH imaging

Peter M. Jakob, Mark A. Griswold, Robert R. Edelman, Daniel K. Sodickson

Research output: Contribution to journalArticlepeer-review


Recently a new fast magnetic resonance imaging strategy, SMASH, has been described, which is based on partially parallel imaging with radiofrequency coil arrays. In this paper, an internal sensitivity calibration technique for the SMASH imaging method using self-calibration signals is described. Coil sensitivity information required for SMASH imaging is obtained during the actual scan using correlations between undersampled SMASH signal data and additionally sampled calibration signals with appropriate offsets in k- space. The advantages of this sensitivity reference method are that no extra coil array sensitivity maps have to be acquired and that it provides coil sensitivity information in areas of highly non-uniform spin-density. This auto-calibrating approach can be easily implemented with only a small sacrifice of the overall time savings afforded by SMASH imaging. The results obtained from phantom imaging experiments and from cardiac studies in nine volunteers indicate that the self-calibrating approach is an effective method to increase the potential and the flexibility of rapid imaging with SMASH.

Original languageEnglish (US)
Pages (from-to)42-54
Number of pages13
JournalMagnetic Resonance Materials in Physics, Biology and Medicine
Issue number1
StatePublished - Nov 1998


  • MR image reconstruction
  • RF coil array
  • Simultaneous acquisition

ASJC Scopus subject areas

  • Biophysics
  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging


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