MAGNETIC RESONANCE IMAGING APPARATUS
First Claim
1. A magnetic resonance imaging apparatus comprising:
- an RF coil apparatus configured to receive magnetic resonance signals by a plurality of coil elements corresponding to a plurality of channels, to modurate the magnetic resonance signals to have different frequencies for each of the channels, and to output an analog multiplexed signal in which the magnetic resonance signals with different frequencies are composited over the plurality of channels; and
a receiver including analog-to-digital conversion circuitry configured to convert the analog multiplexed signal to a digital multiplexed signal, and including a predetermined number of separation channels configured to separate the digital multiplexed signal, based on a number of the channels relating to composition of the magnetic resonance signals with the different frequencies, the receiver being configured to stop a process of separation of the digital multiplexed signal for separation channels which are not used in the process of separation among the predetermined number of separation channels.
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Accused Products
Abstract
According to one embodiment, a MRI apparatus includes an RF coil apparatus receiving MR signals by coil elements corresponding to channels, modurating the MR signals to have different frequencies for each of the channels, and outputting an analog multiplexed signal in which the MR signals with different frequencies are composited over the channels, and a receiver including ADC circuitry converting the analog multiplexed signal to a digital multiplexed signal, and predetermined number of separation channels separating the digital multiplexed signal, based on the number of the channels relating to composition of the MR signals with the different frequencies. The receiver stops a separation process of the digital multiplexed signal for separation channels not used in the separation process among the predetermined number of separation channels.
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Citations
9 Claims
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1. A magnetic resonance imaging apparatus comprising:
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an RF coil apparatus configured to receive magnetic resonance signals by a plurality of coil elements corresponding to a plurality of channels, to modurate the magnetic resonance signals to have different frequencies for each of the channels, and to output an analog multiplexed signal in which the magnetic resonance signals with different frequencies are composited over the plurality of channels; and a receiver including analog-to-digital conversion circuitry configured to convert the analog multiplexed signal to a digital multiplexed signal, and including a predetermined number of separation channels configured to separate the digital multiplexed signal, based on a number of the channels relating to composition of the magnetic resonance signals with the different frequencies, the receiver being configured to stop a process of separation of the digital multiplexed signal for separation channels which are not used in the process of separation among the predetermined number of separation channels. - View Dependent Claims (2, 3, 4, 5)
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6. A magnetic resonance imaging apparatus comprising:
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an RF coil apparatus including a plurality of coil elements which correspond to a plurality of channels and are configured to receive a plurality of magnetic resonance signals, an oscillator configured to generate a plurality of first local signals having, respectively, a plurality of first frequencies corresponding to the plurality of channels, a multiplier configured to multiply, with respect to each of the channels, the plurality of magnetic resonance signals by the plurality of first local signals, and composition circutry configured to generate an analog multiplexed signal by adding the magnetic resonance signals which were multiplied by the first local signals, over the channels; and a receiver including an analog-to-digital converter configured to convert the analog multiplexed signal to a digital multiplexed signal, and a direct digital synthesizer configured to generate a plurality of second local signals having, respectively, a plurality of second frequencies corresponding to the first frequencies, the receiver being configured to separate the digital multiplexed signal into a number of the channels relating to an addition of the magnetic resonance signals, and to multiply, with respect to each of the channels, the digital multiplexed signal before the separation or the digital multiplexed signal after the separation by the second local signals. - View Dependent Claims (7, 8, 9)
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Specification