Magnetic resonance imaging apparatus and magnetic resonance imaging method

摘要

According to one embodiment, a magnetic resonance imaging apparatus includes an acquiring unit and a generating unit. The acquiring unit performs compensation of a control waveform of a radio-frequency wave based on “an output waveform of a radio-frequency wave from an amplifier before the compensation” so that an intended output waveform of a radio-frequency wave for generating a spatially non-selective radio-frequency magnetic field is outputted from the amplifier, and acquires a magnetic resonance signal using the control waveform of a radio-frequency wave after the compensation. The generating unit generates image data based on the magnetic resonance signal.

主权项

1. A magnetic resonance imaging (MRI) apparatus comprising:
an MRI radio frequency (RF) transmitter amplifier circuit configured to controllably compensate an output waveform of an RF pulse from an amplifier during an MRI diagnostic data acquisition scan based on (a) a prior prescan output waveform of an RF pulse from said amplifier before compensation, said prior output from said amplifier having been generated in response to an intended waveform inputted to the amplifier during said prescan and (b) a response function acquired from said amplifier output during the prescan, so that an intended output waveform of an RF pulse for generating a spatially non-selective RF magnetic field is outputted from the amplifier during said MRI diagnostic data acquisition scan; and a generating unit that generates magnetic resonance image data based on magnetic resonance signals acquired during said MRI diagnostic data acquisition scan, wherein the amplifier circuit is configured to perform said compensation of the amplifier output RF pulse waveform plural times by using an input pulse waveform inputted to the amplifier and a response function acquired based on an output pulse waveform outputted from the amplifier according to the input pulse waveform.