A 16-channel receive, forced current excitation dual-transmit coil for breast imaging at 7T

Samantha By, Joseph V. Rispoli, Sergey Cheshkov, Ivan Dimitrov, Jiaming Cui, Stephen Seiler, Sally Goudreau, Craig Malloy, Steven M. Wright, Mary Preston McDougall

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Purpose: To enable high spatial and temporal breast imaging resolution via combined use of high field MRI, array coils, and forced current excitation (FCE) multi channel transmit. Materials and Methods: A unilateral 16-channel receive array insert was designed for use in a transmit volume coil optimized for quadrature operation with dual-transmit RF shimming at 7T. Signal-to-noise ratio (SNR) maps, g-factor maps, and high spatial and temporal resolution in vivo images were acquired to demonstrate the utility of the coil architecture. Results: The dual-transmit FCE coil provided homogeneous excitation and the array provided an increase in average SNR of 3.3 times (max 10.8, min 1.5) compared to the volume coil in transmit/receive mode. High resolution accelerated in vivo breast imaging demonstrated the ability to achieve isotropic spatial resolution of 0.5 mm within clinically relevant 90 s scan times, as well as the ability to perform 1.0 mm isotropic resolution imaging, 7 s per dynamics, with the use of bidirectional SENSE acceleration of up to R=9. Conclusion: The FCE design of the transmit coil easily accommodates the addition of a sixteen channel array coil. The improved spatial and temporal resolution provided by the high-field array coil with FCE dual-channel transmit will ultimately be beneficial in lesion detection and characterization.

Original languageEnglish (US)
Article numbere113969
JournalPLoS One
Volume9
Issue number11
DOIs
Publication statusPublished - Nov 24 2014

    Fingerprint

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

By, S., Rispoli, J. V., Cheshkov, S., Dimitrov, I., Cui, J., Seiler, S., ... McDougall, M. P. (2014). A 16-channel receive, forced current excitation dual-transmit coil for breast imaging at 7T. PLoS One, 9(11), [e113969]. https://doi.org/10.1371/journal.pone.0113969