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.
Diasonics Inc, South San Francisco, Calif.
J S
JS
Tropp
S
S
Sugiura
K A
KA
Derby
Y
Y
Suzuki
C
C
Hawryszko
H
H
Yamagata
J E
JE
Klein
D A
DA
Ortendahl
L
L
Kaufman
G F
GF
Acosta
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