Initial results of cardiac imaging at 7 Tesla

C. J. Snyder, L. DelaBarre, G. J. Metzger, P. F. Van De Moortele, C. Akgun, K. Ugurbil, J. Thomas Vaughan

Research output: Contribution to journalArticlepeer-review

109 Scopus citations

Abstract

This work reports preliminary results from the first human cardiac imaging at 7 Tesla (T). Images were acquired using an eightchannel transmission line (TEM) array together with local B1 shimming. The TEM array consisted of anterior and posterior plates closely positioned to the subjects' thorax. The currents in the independent elements of these arrays were phased to promote constructive interference of the complex, short wavelength radio frequency field over the entire heart. Anatomic and functional images were acquired within a single breath hold to reduce respiratory motion artifacts while a vector cardiogram (VCG) was used to mitigate cardiac motion artifacts and gating. SAR exposure was modeled, monitored, and was limited to FDA guidelines for the human torso in subject studies. Preliminary results including short-axis and four-chamber VCG-retrogated FLASH cines, as well as, short-axis TSE images demonstrate the feasibility of safe and accurate human cardiac imaging at 7T.

Original languageEnglish (US)
Pages (from-to)517-524
Number of pages8
JournalMagnetic resonance in medicine
Volume61
Issue number3
DOIs
StatePublished - Mar 2009

Keywords

  • 7T cardiac
  • B shimming
  • Transceiver array

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