Magnetic resonance signal transmission method, device and magnetic resonance equipment
A technology of a magnetic resonance signal and a transmission method, applied in the field of signal transmission, can solve the problem of the space occupied by the cable and the coil, and achieve the effect of solving the space occupied by the cable and solving the multipath interference.
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Embodiment 1
[0036] Such as figure 1 , 2 As shown in and 3, the single-channel magnetic resonance signal transmission method in this embodiment is realized in this way:
[0037] At the end of the transmitting device 10, the magnetic resonance signal received by the coil 11 is amplified by the preamplifier 12;
[0038] The amplified signal is mixed with the local oscillator LO1, and the difference frequency signal S1 is formed after the first band-pass filter 13 filters out the sum frequency signal and out-of-band noise; the purpose of this step is to provide an analog-to-digital conversion (A / D ) to prepare for improving the signal-to-noise ratio of the A / D output signal.
[0039] Then use the analog-to-digital conversion device 14 to sample the difference frequency signal S1, and the data after the sampling form the information symbol S2 through the encoder (not shown); The modulo two addition operation forms the transmission symbol S3. Here, the width of the information symbol S2 sho...
Embodiment 2
[0048] Such as Figure 4 As shown, the difference between the multi-channel magnetic resonance signal transmission method and the single-channel transmission method is that at the transmitting device 10, due to the existence of the multi-channel coil unit, when the magnetic resonance signal is transmitted, the signal amplified by the preamplifier 12 Should be sent to radio frequency switch 16, described radio frequency switch 16 is controlled by the control signal that system sends, is used for determining that the signal that receives in a certain time is sent by a certain coil 11 unit in the multi-channel coil, thereby the coil 11 corresponds to subsequent image reconstruction and related applications. Except that the radio frequency switch 16 is used to realize the time division multiplexing of the channels of the multiple coils, the other transmission processes are the same as those of the single coil, and will not be repeated here, and the same below.
[0049]Described s...
Embodiment 3
[0053] Such as Figure 5 and Figure 6 As shown, the single-channel magnetic resonance signal transmission method can also be implemented as follows:
[0054] At the end of the sending device 10, the magnetic resonance signal received by the coil 11 is first amplified by the preamplifier 12;
[0055] Then directly pass through the first bandpass filter 13 to filter out the out-of-band noise to form the signal S1; the frequency mixing step in Embodiment 1 is omitted, that is, it is not necessary to use the local oscillator LO1 at the transmitting device 10 end to mix the signal through the mixer. frequency, reducing the cost of the transmitting device 10.
[0056] Then the signal S1 is sampled by the analog-to-digital conversion device 14; the subsequent steps at the sending device 10 are the same as those in the first embodiment.
[0057] At the receiving device 20, the difference from Embodiment 1 is that the despread intermediate frequency signal S7 is mixed with the loca...
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