Quadrature birdcage coil with distributed capacitors for 7.0 T magnetic resonance data acquisition of small animals

Riccardo Stara, Gianluigi Tiberi, Matteo Gabrieli, Guido Buonincontri, Nunzia Fontana, Agostino Monorchio, Mauro Costagli, Mark Roger Symms, Alessandra Retico, Michela Tosetti

Research output: Contribution to journalArticlepeer-review

Abstract

High static magnetic field magnetic resonance imaging (MRI) is commonly used for preclinical studies in rodents. In this context, minimization of coil losses is mandatory to scan samples that are small compared to the radiofrequency wavelength in the medium. In this study we construct a radiofrequency (RF) birdcage probe with distributed capacitors, operating in quadrature, tailored for 7.0T 1H MRI of small animals. The design eliminates the need for extra electrical components on the probe structure and affords a high SNR, a uniform B1+ field (homogeneity of 93% in the axial plain of the phantom) and a coil sensitivity of 9.8 μT/W. Feasibility experiments of mouse imaging are conducted and the competitive capability of a 7.0 T human system equipped with the proposed coil is demonstrated in both body and brain preclinical imaging.

Original languageEnglish
Pages (from-to)83-88
Number of pages6
JournalConcepts in Magnetic Resonance Part B: Magnetic Resonance Engineering
Volume44
Issue number4
DOIs
Publication statusPublished - Oct 1 2015

Keywords

  • Distributed capacitance
  • RF volume coils
  • Small animal MR
  • Ultra high field magnetic resonance

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

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