Shielded gradient coils and radio frequency probes for high-resolution imaging of rat brains.
A shielded gradient system and radio frequency probes for a 4.7-T/30-cm horizontal bore magnet are described. The systems were designed principally to obtain images and localized spectra from rat brains. The gradients can operate in either a shielded or non-shielded mode. The rf probe, which combines both highest sensitivity and highest resolution, consists of a large modified saddle type transmitter and a small surface reception coil, actively decoupled using diodes. The system performance is demonstrated on phantoms and on a rat brain, where an image with in plane resolution of 80 microns and a slice thickness of 150 microns is obtained.
Jasinski
A
A
Institute of Nuclear Physics, Krakow, Poland.
Jakubowski
T
T
Rydzy
M
M
Morris
P
P
Smith
I C
IC
Kozlowski
P
P
Saunders
J K
JK
D000818:Animals; D001921:Brain / Q000033:anatomy & histology; D004867:Equipment Design; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000295:instrumentation* / Q000379:methods; D008280:Magnetics; D008961:Models, Structural; D011846:Radio Waves; D051381:Rats; D013499:Surface Properties