Apparatus and method for optimizing the spectra of parallel...

Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system

Reexamination Certificate

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C324S307000

Reexamination Certificate

active

07808240

ABSTRACT:
An MRI apparatus includes a magnetic resonance imaging (MRI) system having a magnet to impress a polarizing magnetic field, a plurality of gradient coils positioned about the bore of the magnet to impose a magnetic field gradient, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF pulses to an RF coil assembly and to acquire MR images, and a computer programmed to apply a plurality of RF pulses configured to control RF excitation by a transmit coil array such that a waveform shape of each of the plurality of RF pulses is based on optimizing a spatial spectrum.

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Zhu et al., “Transmit Coil Array for Accelerating 2D Excitation on an Eight-Channel Parallel Transmit System,” Proc. Intl. Soc. Mag. Reson. Med., vol. 14, 2006, p. 122.
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Zhu et al., “Parallel Excitation on an Eight Transmit-Channel MRI System,” Proc. Intl. Soc. Mag. Reson. Med., vol. 13, 2005, p. 14.
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