Applications of chemical shift imaging to marine sciences.
The successful applications of magnetic resonance imaging (MRI) in medicine are mostly due to the non-invasive and non-destructive nature of MRI techniques. Longitudinal studies of humans and animals are easily accomplished, taking advantage of the fact that MRI does not use harmful radiation that would be needed for plain film radiographic, computerized tomography (CT) or positron emission (PET) scans. Routine anatomic and functional studies using the strong signal from the most abundant magnetic nucleus, the proton, can also provide metabolic information when combined with in vivo magnetic resonance spectroscopy (MRS). MRS can be performed using either protons or hetero-nuclei (meaning any magnetic nuclei other than protons or ¹H) including carbon (¹³C) or phosphorus (³¹P). In vivo MR spectra can be obtained from single region of interest (ROI or voxel) or multiple ROIs simultaneously using the technique typically called chemical shift imaging (CSI). Here we report applications of CSI to marine samples and describe a technique to study in vivo glycine metabolism in oysters using ¹³C MRS 12 h after immersion in a sea water chamber dosed with [2-¹³C]-glycine. This is the first report of ¹³C CSI in a marine organism.
Joint Department of Biomedical Engineering NC State University and UNC Chapel Hill, Chapel Hill, NC 27599, USA. Haakil@email.unc.edu
Haakil
H
Lee
Andrey
A
Tikunov
Michael K
MK
Stoskopf
Jeffrey M
JM
Macdonald
D000818:Animals; D059001:Aquatic Organisms / Q000378:metabolism; D002244:Carbon / Q000378:metabolism; D049896:Crassostrea / Q000378:metabolism; D005998:Glycine / Q000378:metabolism; D006801:Humans; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D009792:Oceans and Seas; D010758:Phosphorus / Q000378:metabolism; D011161:Porifera / Q000378:metabolism; D011522:Protons; D012984:Software
D011522:Protons; D010758:Phosphorus; D002244:Carbon; D005998:Glycine