Analysis of sinusoidal-shaped frequency-selective RF pulses.
RODEO (rotating delivery of excitation off resonance), which can be represented as an delta [symbol: see text] pulse where delta is an 2 pi-sinusoidal waveform and [symbol: see text] = - delta, has been used as a frequency-selective rf pulse for fat-suppressed three-dimensional magnetic resonance imaging. This study systematically compared several sinusoidal-shaped pulses with different combinations of delta and [symbol: see text]. The sinusoidal-shaped pulses were also compared with the Gaussian-shaped and binomial-shaped pulses. The overall performances for fat suppression can be rated as "delta [symbol: see text] delta > 1331 > delta [symbol: see text] = 121," where 121 and 1331 are second- and third-order binomial pulses, respectively.
Hua
J
J
Department of Radiology, Royal Perth Hospital, Australia.
Ives
F J
FJ
D000273:Adipose Tissue / Q000033:anatomy & histology*; D001940:Breast / Q000033:anatomy & histology; D003238:Connective Tissue / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008953:Models, Anatomic