Expansion of the spectral bandwidth by spatial and chemical shift selective saturation in high-speed magnetic resonance spectroscopic imaging.
A new spectral bandwidth expansion technique for high-speed magnetic resonance spectroscopic imaging (MRSI) based on an echo-planar technique is presented. This expansion can be achieved by spatial and chemical shift selective saturation without increasing the total measurement time. In addition, displacement along the slice-select direction due to chemical-shift differences between the measured compounds is also suppressed. Experimental results are shown using a phantom consisting of benzene and acetone. High spatial resolution (1 x 1 mm2) and wide spectral bandwidth (1.5-1.8 kHz; the effective spectral bandwidth has been doubled) are obtained without the displacement along the slice-select direction.
Hirata
S
S
Medical Electronics Research Center, Hitachi, Ltd., Tokyo, Japan.
Bito
Y
Y
Yamamoto
E
E
D017352:Echo-Planar Imaging / Q000379:methods*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D019047:Phantoms, Imaging; D013997:Time Factors