Characterization of MR spectroscopic imaging of the human head and limb at 2.0 T.
Using section-select and phase-encoding gradients, the authors obtained phosphorus chemical shift images of the human head and limb. Phosphorus spectra were acquired from planar sections divided into voxels as small as 7 cm3 in calf muscle and 27 cm3 in brain, with total examination times, including setup and proton locator imaging, of roughly 1 hour. Both spin-echo and free induction decay (FID) methods were employed; the FID gave superior results. Signal-to-noise ratios for the beta-adenosine triphosphate and phosphocreatine resonances were as high as 10:1 and 13:1 from volumes of 27 cm3 in brain.
Tropp
J S
JS
Diasonics Inc, South San Francisco, Calif.
Sugiura
S
S
Derby
K A
KA
Suzuki
Y
Y
Hawryszko
C
C
Yamagata
H
H
Klein
J E
JE
Ortendahl
D A
DA
Kaufman
L
L
Acosta
G F
GF
D001921:Brain / Q000033:anatomy & histology*; D005121:Extremities / Q000033:anatomy & histology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D010758:Phosphorus; D013997:Time Factors
D010758:Phosphorus