Patent ID: 7560933

Claim:
An MRI apparatus comprising: an RF coil to which analog RF pulse signals are applied; an RF pulse generating circuit configured to generate the analog RF pulse signals; and a magnetic resonance signal receiving circuit configured to receive analog magnetic resonance signals and to convert the analog magnetic resonance signals into baseband digital magnetic resonance signals, wherein said RF pulse generating circuit comprises: a carrier signal generator configured to generate a digital carrier signal having a predetermined number of bits; a digital modulator configured to modulate the digital carrier signal with a digital envelope signal to generate digital RF pulse signals; a digital-analog converter configured to generate the digital RF pulse signals into the analog RF pulse signals; and an inversion unit configured to generate a digital inverted carrier signal having a two's complement relationship with the digital carrier signal and to send the digital inverted carrier signal to said magnetic resonance signal receiving circuit, and wherein said magnetic resonance signal receiving circuit comprises: an analog-digital converter configured to convert the analog magnetic resonance signals into digital magnetic resonance signals having a predetermined number of bits; and a digital demodulator configured to demodulate the digital magnetic resonance signals with the digital inverted carrier signal to convert the digital magnetic resonance signals into the baseband digital magnetic resonance signals.