Carbon-13 chemical shift imaging of [1-13C] glucose under metabolism in the rat head in vivo.
Carbon-13 chemical shift images (metabolic maps) of [1-13C] glucose in the heads of rats were obtained and compared with proton images of the same rats in terms of signal allocation. Wistar rats were kept awake or anesthetized. [1-13C] glucose was injected intravenously in a dose of 1 g per kg of body weight. The head of the Wistar rat was placed on or into circular coils. Carbon-13 images were obtained using a 7.05 Tesla system. A simple spin echo sequence was used with a chemical shift selective (CHESS) pulse. The frequency band width was set to cover the spectral breadth of the carbon-13 signal of [1-13C] glucose. The slice thickness of the image was 4 mm or 6 mm, and the field of view (FOV) was 60 mm x 60 mm, with a matrix size of 64 x 64. The total acquisition time was 36 minutes. Strong signals were observed from the scalp muscles and tissues outside the brain, but signal strength from the brain itself was minimal. This was presumably due to the metabolism of [1-13C] glucose in the brain. Little difference was recognized between [1-13C] glucose images of the heads of rats with and without anesthesia. Chemical shift imaging of carbon-13 could be useful methods for the in vivo study of physiochemical structures and metabolic pathways of living organs.
Morishita
S
S
Department of Radiology, Kumamoto University, School of Medicine, Japan.
Sumi
M
M
Nishimura
R
R
Takahashi
M
M
Iriguchi
N
N
D000818:Animals; D001921:Brain / Q000033:anatomy & histology* / Q000378:metabolism; D002247:Carbon Isotopes; D005947:Glucose; D006257:Head / Q000033:anatomy & histology; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy; D051381:Rats; D011919:Rats, Inbred Strains; D012535:Scalp / Q000033:anatomy & histology
D002247:Carbon Isotopes; D005947:Glucose