Patent ID: 8049505
Filing Date: 2011-11-01
Classification: G01R,H03H

Abstract:
1. Magnetic resonance imaging system having a transmit phase and a receive phase, comprising: an RF receive coil, adapted to resonate in the resonant frequency spectrum, for receiving a magnetic resonance signal during the receive phase; and a direct digital receiver for converting said received magnetic resonance signal to a digital base-band signal, including: an analog-to-digital converter for converting said received signal to a first digital sample signal at a sampling frequency, a digital down converter for down-mixing a second digital sample signal to a bandwidth limited digital base-band signal having a digital operating frequency, and a resampling unit coupled between said analog-to-digital converter and said digital down converter for resampling said first digital sample signal at said sampling frequency to said second digital sample signal at said digital operating frequency, wherein said resampling unit is adapted for resampling said sampling frequency to said digital operating frequency by i) transferring the samples of said digital sampled signal to said digital operating frequency domain using the relative phase of the sampling frequency with respect to the digital operating frequency to determine when to transfer a sample and ii) interpolating said transferred samples for generating a stream of samples at the digital operating frequency.