Radio frequency receiving device
AssigneeShanghai United Imaging Healthcare Co., Ltd.
InventorsXiaolei Guan, Jianfan Zhou, Fangyan Hou, Qiang Xie
Life of this patent
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Abstract
A device for receiving RF signal is provided. The device includes a receiving component configured to receive a radio frequency (RF) signal and a sampling component configured to sample the RF signal. The sampling component may include a plurality of filters, a demultiplexer, a clock synthesizer, an analog-to-digital converter (ADC), and a digital signal processing device. The sampling component may obtain an intermediate frequency (IF) signal based on the plurality of filters, the demultiplexer, the clock synthesizer, the ADC, and the digital signal processing device.
Claims20
A digital signal processing device comprising:
- a first channel configured to process a first signal originating from a subject to obtain a first intermediate frequency (IF) signal with a first bit-width, wherein the first signal originates from hydrogen nuclei in the subject by a magnetic resonance imaging system, and the first channel further comprises:
- a band pass decimation filter configured to process the first signal to obtain the first IF signal;
- a second channel configured to process a second signal originating from the subject, wherein the second signal originates from non-hydrogen nuclei in the subject by the magnetic resonance imaging system, and the second channel includes:
- an in-phase/quadrature (I/Q) demodulator configured to divide the second signal to obtain a third signal with a third bit-width and a fourth signal with a fourth bit-width, wherein the I/Q demodulator further includes at least one low pass decimation filter, the at least one low pass decimation filter being configured to perform the I/Q demodulation;
- and
- a combination element configured to combine the third signal with the fourth signal to obtain a second IF signal with the first bit-width;
- and
- a reconstructor configured to perform an image reconstruction based on the first IF signal and the second IF signal that are transmitted from the digital signal processing device.
A method implemented on a digital processing device, comprising:
- receiving a free induction decay (FID) signal;
- determining that the FID signal is a first signal originating from a first species of nuclei, wherein the first species of nuclei of the subject refers to hydrogen nuclei;
- in response to the determination that the FID signal is the first signal, processing, via a first channel, the first signal to obtain a first intermediate frequency (IF) signal with a first bit-width, wherein the first channel further comprises:
- a band pass decimation filter configured to process the first signal to obtain the first IF signal;
- determining that the FID signal is a second signal originating from a second species of nuclei, wherein the second species of nuclei of the subject refers to non-hydrogen nuclei;
- in response to the determination that the FID signal is the second signal,
- performing, via a second channel, an in-phase/quadrature (I/Q) demodulation for dividing the second signal to obtain a third signal with a third bit-width and a fourth signal with a fourth bit-width, wherein the second channel further includes at least one low pass decimation filter, the at least one low pass decimation filter being configured to perform the I/Q demodulation;
- and
- combining, via the second channel, the third signal with the fourth signal to obtain a second IF signal with the first bit-width;
- and
- performing, via a reconstructor, an image reconstruction based on the first IF signal and the second IF signal that are transmitted from the digital signal processing device.
Dependencies are inferred from the claim text.