Receiver of magnetic resonance system and magnetic resonance system

• US 10,126,384 B2
• Filed: 03/24/2015
• Issued: 11/13/2018
• Est. Priority Date: 03/28/2014
• Status: Active Grant

• Current Assignee: Siemens Healthineers AG (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Dai, Guang Bao, Wang, Lan, Li, Zhi Bin
• Primary Examiner(s): Patel, Rishi
• Application Number:
  US14/666,535
• Publication Number:
  US 20150276899A1
• Time in Patent Office: 1,330 Days
• CPC Class Codes: G01R 33/3621 NMR receivers or demodulators, e.g. preamplifiers, means for frequency modulation of the MR signal using a digital down converter, means for analog to digital conversion [ADC] or for filtering or processing of the MR signal such as bandpass filtering, resampling, decimation or interpolation
• CPC Class Codes: G01R 33/3664 Switching for purposes other than coil coupling or decoupling, e.g. switching between a phased array mode and a quadrature mode, switching between surface coil modes of different geometrical shapes, switching from a whole body reception coil to a local reception coil or switching for automatic coil selection in moving table MR or for changing the field-of-view G01R33/3671 takes precedence
• CPC Class Codes: G01R 33/543 Control of the operation of the MR system, e.g. setting of acquisition parameters prior to or during MR data acquisition, dynamic shimming, use of one or more scout images for scan plane prescription G01R33/546 takes precedence

Abstract

A receiver of a magnetic resonance imaging system and a magnetic resonance imaging system are provided. The receiver includes a receiving end for receiving an analog magnetic resonance signal from a local coil of the magnetic resonance imaging system, a sending end for sending a digital magnetic resonance signal to an image reconstruction apparatus of the magnetic resonance imaging system, at least two digital processing channels connected to the sending end for digitizing the analog magnetic resonance signal to the digital magnetic resonance signal, and a channel selection unit connected between the digital processing channels and the receiving end for selecting a corresponding digital processing channel from the digital processing channels according to type information about the local coil. The embodiments may be compatible with many types of local coils without re-designing the local coils, which significantly reduces the cost of the system.

Claims

1. A receiver of a magnetic resonance imaging system, comprising:

a receiving end for receiving a plurality of analog magnetic resonance signals from a local coil of the magnetic resonance imaging system;

a sending end for sending digital magnetic resonance signals to an image reconstruction apparatus of the magnetic resonance imaging system;

at least two digital processing channels connected to the sending end for digitizing the plurality of analog magnetic resonance signals to the digital magnetic resonance signals, wherein the at least two digital processing channels comprise a radio frequency digital processing channel and an intermediate frequency signal digital processing channel; and

a channel selection unit connected between the at least two digital processing channels and the receiving end for selecting a corresponding digital processing channel from the at least two digital processing channels according to type information about the local coil, wherein the channel selection unit comprises a band pass filter connected to the radio frequency signal digital processing channel and a low pass filter connected to the intermediate frequency signal digital processing channel.

2. The receiver as claimed in claim 1, wherein the channel selection unit is further connected to a control unit of the magnetic resonance imaging system for acquiring the type information from the control unit.

3. The receiver as claimed in claim 2, further comprising:

a gain adjustable amplifier for amplifying the plurality of analog magnetic resonance signals.

4. The receiver as claimed in claim 1, wherein the channel selection unit comprises a toggle switch, and the toggle switch turns on the corresponding digital processing channel according to the type information.

5. The receiver as claimed in claim 4, further comprising:

a gain adjustable amplifier for amplifying the plurality of analog magnetic resonance signals.

6. The receiver as claimed in claim 1, further comprising:

a gain adjustable amplifier for amplifying the plurality of analog magnetic resonance signals.

7. The receiver as claimed in claim 6, wherein the gain adjustable amplifier is connected between the receiving end and the channel selection unit.

8. The receiver as claimed in claim 6, wherein the gain adjustable amplifier is configured to adjust a gain coefficient of the gain adjustable amplifier according to the type information.

9. The receiver as claimed in claim 8, wherein the gain adjustable amplifier is connected to a control unit of the magnetic resonance imaging system for acquiring the type information from the control unit.

10. A magnetic resonance imaging system, comprising:

a local coil;

an image reconstruction apparatus;

a control unit configured to acquire type information from the local coil; and

a receiver comprising;

a receiving end for receiving a plurality of analog magnetic resonance signals from the local coil;

a sending end for sending digital magnetic resonance signals to the image reconstruction apparatus;

at least two digital processing channels connected to the sending end for digitizing the plurality of analog magnetic resonance signals to the digital magnetic resonance signals, wherein the at least two digital processing channels comprise a radio frequency digital processing channel and an intermediate frequency signal digital processing channel; and

a channel selection unit connected between the at least two digital processing channels and the receiving end for selecting a corresponding digital processing channel from the at least two digital processing channels according to the type information about the local coil, wherein the channel selection unit comprises a band pass filter connected to the radio frequency signal digital processing channel and a low pass filter connected to the intermediate frequency signal digital processing channel.

11. The magnetic resonance imaging system as claimed in claim 10, wherein the receiver further comprises a gain adjustable amplifier for amplifying the plurality of analog magnetic resonance signals.

12. The magnetic resonance imaging system as claimed in claim 11, wherein the gain adjustable amplifier is connected to the control unit.

13. The magnetic resonance imaging system as claimed in claim 12, wherein the gain adjustable amplifier is connected between the receiving end and the channel selection unit.

14. The magnetic resonance imaging system as claimed in claim 11, wherein the gain adjustable amplifier is configured to adjust a gain coefficient of the gain adjustable amplifier according to the type information.

15. The magnetic resonance imaging system as claimed in claim 11, wherein the gain adjustable amplifier is connected to a control unit of the magnetic resonance imaging system for acquiring the type information from the control unit.