A simple device for respiratory gating for the MRI of laboratory animals.
Respiratory motion must be overcome if MRI of the abdomen, even at the lowest resolution, is to be performed satisfactorily. A simple and reliable respiratory gating device, based on the interruption of an infrared (IR) optical beam is described. This device has the advantage that gating is based on the position of the chest as opposed to its velocity, and that it can be used without degrading the radiofrequency isolation of a Faraday cage. Its use in animal MRI is illustrated by high resolution (200 microns) images of in vivo rat liver and kidney.
Herchel Smith Laboratory for Medicinal Chemistry, University of Cambridge School of Clinical Medicine, University Forvie Site, UK.
N G
NG
Burdett
T A
TA
Carpenter
L D
LD
Hall
D000005:Abdomen / Q000033:anatomy & histology; D000818:Animals; D016477:Artifacts; D004867:Equipment Design; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D008297:Male; D009068:Movement; D051381:Rats; D017208:Rats, Wistar; D012119:Respiration