Method and apparatus for acquiring image in magnetic resonance imaging system

• US 10,359,482 B2
• Filed: 04/08/2013
• Issued: 07/23/2019
• Est. Priority Date: 12/06/2012
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Chon, Hak-soo
• Primary Examiner(s): Koval, Melissa J
• Assistant Examiner(s): Fetzner, Tiffany A
• Application Number:
  US13/858,226
• Publication Number:
  US 20140159719A1
• Time in Patent Office: 2,297 Days
• Field of Search: 324300-322, 600407-435, 382128-131
• CPC Class Codes: G01R 33/3415 comprising arrays of sub-coils , i.e. phased-array coils with flexible receiver channels
• CPC Class Codes: G01R 33/3628 Tuning/matching of the transmit/receive coil
• 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

Abstract

A method of acquiring an image in an MRI system includes dividing a scannable region of an object into regions, determining a coil to be used for the divided regions, receiving signals from the determined coil via signal channels connected to the determined coil and grouped by using a switching device, and acquiring the image from the received signals.

Claims

1. A method of acquiring an image in a magnetic resonance imaging (MRI) system, the method comprising:

dividing, by a processor, a scannable region of an object into regions;

determining, by the processor, a coil to be used for each of the regions, the determined coil of each of the regions outputting coil signals acquired from the object, through MR signal channels connected to the determined coil and grouped with switching devices, wherein each of the switching devices comprises one output channel and input channels, and each of the input channels is selectively connectable to the one output channel;

receiving, by a receiver, the coil signals, which are input through the MR signal channels connected to the input channels of the grouped switching devices and output from the one output channel of each of the grouped switching devices; and

acquiring, by an image processor, the image from the coil signals received via the one output channel of each of the grouped switching devices,

wherein each of the switching devices comprises a plurality of input units corresponding to the input channels and one common output terminal corresponding to the one output channel,

each of the switching devices has a construction in which the one common output terminal is connected to one input unit at a time, among the plurality of input units, thereby connecting the one output channel to one of the input channels,

the switching devices comprise a first switching device having a first plurality of input channels, as the input channels, and a second switching device having a second plurality of input channels, as the input channels,

the determining the coil comprises determining a first coil to be used for a first region, among the regions, and a second coil to be used for a second region, among the regions,

the MR signal channels of the first coil comprise first MR signal channels connected to a first input channel of the first plurality of input channels and a first input channel of the second plurality of input channels, respectively, and

the MR signal channels of the second coil comprise second MR signal channels connected to a second input channel of the first plurality of input channels and a second input channel of the second plurality of input channels, respectively.

2. The method of claim 1, wherein the scannable region comprises an area on a table on which the object is to be positioned for imaging, and

the dividing the scannable region comprises dividing the area on the table into the regions.

3. The method of claim 2, wherein the determining the coil further comprises:

acquiring information about connectors on the table which are to be connected to the first coil and the second coil;

extracting identification information for identifying the first coil and the second coil from the acquired information; and

identifying the first coil and the second coil based on the identification information.

4. The method of claim 3, wherein the receiving the coil signals comprises:

allocating the first MR signal channels and the second MR signal channels to the first region and the second region, respectively;

acquiring allocation information about the first MR signal channels and the second MR signal channels allocated to correspond to the first region and the second region, respectively;

controlling the first switching device and the second switching device based on the identification information and the acquired allocation information; and

receiving the coil signals from at least one from among the first coil and the second coil based on the controlling.

5. The method of claim 4, wherein at least one from among the first region and the second region comprises a region of interest (ROI) to be scanned,

the controlling comprises enabling at least one from among the first MR signal channels and the second MR signal channels that is allocated to the ROI, and

the acquiring the image comprises acquiring an image of the ROI.

6. A non-transitory computer-readable storage medium having recorded thereon a program for executing the method of claim 1.

7. The method of claim 5, wherein the acquiring the image further comprises acquiring the image of the ROI by combining the coil signals.

8. An apparatus for acquiring an image in a magnetic resonance imaging (MRI) system, the apparatus comprising:

switching devices, each switching device comprising one output channel and input channels, each of the input channels being selectively connectable to the one output channel;

a processor configured to divide a scannable region of an object into regions, and to determine a coil to be used for each of the regions, the determined coil of each of the regions outputting coil signals acquired from the object, through MR signal channels connected to the determined coil and grouped with the switching devices;

a receiver configured to receive the coil signals, which are input through the MR signal channels connected to the input channels of the grouped switching devices and output from the one output channel of each of the grouped switching devices; and

an image processor configured to acquire the image from the coil signals received via the one output channel of each of the grouped switching devices,

wherein each of the switching devices comprises a plurality of input units corresponding to the input channels and one common output terminal corresponding to the one output channel,

each of the switching devices has a construction in which the one common output terminal is connected to one input unit at a time, among the plurality of input units, thereby connecting the one output channel to one of the input channels,

the switching devices comprise a first switching device having a first plurality of input channels, as the input channels, and a second switching device having a second plurality of input channels, as the input channels,

the processor is further configured to determine a first coil to be used for a first region, among the regions, and a second coil to be used for a second region, among the regions,

the MR signal channels of the first coil comprise first MR signal channels connected to a first input channel of the first plurality of input channels and a first input channel of the second plurality of input channels, respectively, and

the MR signal channels of the second coil comprise second MR signal channels connected to a second input channel of the first plurality of input channels and a second input channel of the second plurality of input channels, respectively.

9. The apparatus of claim 8, wherein the scannable region comprises an area on a table on which the object is to be positioned, and

the processor is further configured to divide the area on the table into the regions.

10. The apparatus of claim 9, wherein the processor is further configured to:

acquire information about connectors on the table which are to be connected to the first coil and the second coil, respectively;

extract identification information for identifying the first coil and the second coil from the acquired information; and

identify the first coil and the second coil based on the identification information.

11. The apparatus of claim 10, wherein the receiver comprises:

an information processor configured to acquire allocation information about the first MR signal channels and the second MR signal channels allocated to correspond to the first region and the second region, respectively; and

a controller configured to control the first switching device and the second switching device based on the identification information and the acquired allocation information, and

wherein the receiver is further configured to receive the coil signals from at least one from among the first coil and the second coil based on a control of the controller.

12. The apparatus of claim 11, wherein at least one from among the first region and the second region comprises a region of interest (ROI) to be scanned,

the controller is further configured to enable at least one from among the first MR signal channels and the second MR signal channels that is allocated to the ROI, and

the image processor is further configured to acquire the image of the ROI.

13. The apparatus of claim 12, wherein the image processor is further configured to acquire the image of the ROI by combining the coil signals.

14. The apparatus of claim 9, wherein the receiver is included in the table on which the object is to be positioned.

15. A magnetic resonance imaging (MRI) method comprising:

dividing, by a processor, a patient support table into regions;

allocating, by the processor, MR signal channels to the regions;

determining, by the processor, coils to be used for imaging the regions, the determined coils of each of the regions outputting coil signals acquired from an object disposed on the patient support table, through the MR signal channels connected to the determined coils, respectively;

grouping, by the processor, the MR signal channels associated with at least one of the determined coils by using switching devices, wherein each of the switching devices comprises one output channel and input channels, and each of the input channels is selectively connectable to the one output channel;

receiving, by a receiver, the coil signals, which are input through the MR signal channels connected to the input channels of the grouped switching devices and output from the one output channel of each of the grouped switching devices; and

reconstructing, by an image processor, an MR image of a region of interest (ROI) of the object, from the coil signals received via the one output channel of each of the grouped switching devices,

wherein each of the switching devices comprises a plurality of input units corresponding to the input channels and one common output terminal corresponding to the one output channel,

each of the switching devices has a construction in which the one common output terminal is connected to one input unit at a time, among the plurality of input units, thereby connecting the one output channel to one of the input channels,

the switching devices comprise a first switching device having a first plurality of input channels, as the input channels, and a second switching device having a second plurality of input channels, as the input channels,

the at least one of the determined coils comprises a first coil to be used for a first region, among the regions, and a second coil to be used for a second region, among the regions,

the MR signal channels of the first coil comprise first MR signal channels connected to a first input channel of the first plurality of input channels and a first input channel of the second plurality of input channels, respectively, and

the MR signal channels of the second coil comprise second MR signal channels connected to a second input channel of the first plurality of input channels and a second input channel of the second plurality of input channels, respectively.

16. The MRI method of claim 15, wherein the patient support table comprises coil connectors and the determining the coils comprises:

identifying the coil connectors in correspondence to the first region and the second region; and

identifying the first coil and the second coil connected to the coil connectors, for the first region and the second region, respectively.

17. The MRI method of claim 16, wherein at least one from among the first region and the second region comprises the ROI, and

the receiving the coil signals comprises:

enabling at least one from among the first MR signal channels and the second MR signal channels that is associated with the ROI via at least one from among the first switching device and the second switching device, respectively; and

receiving the coil signals from at least one from among the first coil and the second coil that is identified as being connected to the coil connectors corresponding to the ROI.