Journal
MAGNETIC RESONANCE IN MEDICINE
Volume 54, Issue 1, Pages 235-240Publisher
JOHN WILEY & SONS INC
DOI: 10.1002/mrm.20547
Keywords
phased array; 7 T; RF coil design; SNR; high field MRI
Funding
- NCRR NIH HHS [5P41RRO14075-05] Funding Source: Medline
Ask authors/readers for more resources
An eight-channel receive-only brain coil and table-top detunable volume transmit coil were developed and tested at 7 T for human imaging. Optimization of this device required attention to sources of interaction between the array elements, between the transmit and receive coils and minimization of common mode currents on the coaxial cables. Circular receive coils (85 mm dia.) were designed on a flexible former to fit tightly around the head and within a 270-mm diameter TEM transmit volume coil. In the near cortex, the array provided a fivefold increase in SNR compared to a TEM transmit-receive coil, a gain larger than that seen in comparable coils at 3 T. The higher SNR gain is likely due to strong dielectric effects, which cause the volume coil to perform poorly in the cortex compared to centrally. The sensitivity and coverage of the array is demonstrated with high-resolution images of the brain cortex. (c) 2005 Wiley-Liss, Inc.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available