Magnetic resonance imaging system

• US 10,444,312 B2
• Filed: 11/14/2016
• Issued: 10/15/2019
• Est. Priority Date: 05/02/2016
• Status: Active Grant

• Current Assignee: Circle Medisystems Inc.
• Original Assignee: Gachon University of Industry-Academic Cooperation Foundation
• Inventors: Chung, Jun-Young, Kim, Kyoung-Nam, Ryu, Yuenchul, Han, Yeji
• Primary Examiner(s): Phan, Huy Q
• Assistant Examiner(s): Frederiksen, David B
• Application Number:
  US15/350,202
• Publication Number:
  US 20170315192A1
• Time in Patent Office: 1,065 Days
• CPC Class Codes: G01R 33/34046 Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
• CPC Class Codes: G01R 33/3635 Multi-frequency operation
• CPC Class Codes: G01R 33/385 using gradient magnetic field coils
• CPC Class Codes: G01R 33/4828 Resolving the MR signals of different chemical species, e.g. water-fat imaging
• 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
• CPC Class Codes: G01R 33/5608 Data processing and visualization specially adapted for MR, e.g. for feature analysis and pattern recognition on the basis of measured MR data, segmentation of measured MR data, edge contour detection on the basis of measured MR data, for enhancing measured MR data in terms of signal-to-noise ratio by means of noise filtering or apodization, for enhancing measured MR data in terms of resolution by means for deblurring, windowing, zero filling, or generation of gray-scaled images, colour-coded images or images displaying vectors instead of pixels image data processing or generation, in general G06T

Abstract

Disclosed is a magnetic resonance imaging (MRI) system. The disclosed MRI system includes a system controller capable of separately acquiring MR image signals of different elements existing in an object. The system controller includes a first system controller capable of acquiring an MR signal of a first element, and a second system controller capable of acquiring an MR signal of a second element different from the first element. The first system controller and the second system controller are physically separated. The first system controller and the second system controller control a first radio frequency (RF) coil element and a second RF coil element of an RF coil, respectively.

Claims

1. A magnetic resonance imaging (MRI) system comprising:

a main magnet, a gradient coil, and a radio frequency (RF) coil formed in a housing; and

a system controller configured to control the main magnet, the gradient coil, and the RF coil,

wherein the system controller includes different system controllers simultaneously or sequentially acquiring magnetic resonance (MR) images of different elements,

wherein the system controller comprises;

a first system controller configured to acquire an MR signal of a first element; and

a second system controller configured to acquire an MR signal of a second element different from the first element,

wherein the second system controller is different from the first system controller,

wherein the MRI system further comprises a first surface gradient (G)-coil and a second surface gradient (G)-coil, respectively, connected to the first system controller and the second system controller,

wherein each of the first and the second surface gradient G-coils generates gradient magnetic fields in x-axis, y-axis, and z-axis directions perpendicular to each other,

wherein the first system controller is configured to control the first surface gradient (G)-coil to generate a first gradient magnetic field for capturing a first MR image of a first element, and

wherein the second system controller is configured to control the second surface gradient (G)-coil to generate a second gradient magnetic field for capturing a second MR image of a second element.

2. The MRI system of claim 1, wherein operating frequencies of the first system controller and the second system controller differ from each other.

3. The MRI system of claim 1, wherein the first system controller controls a first RF coil element of the RF coil, and the second system controller controls a second RF coil element different from the first RF coil element of the RF coil.

4. The MRI system of claim 3, wherein the first RF coil element and the second RF coil element are formed separately from each other on a base of the RF coil.

5. The MRI system of claim 4, wherein the first RF coil element and the second RF coil element are formed in a loop shape.

6. The MRI system of claim 4, wherein MR signals generated by the first RF coil element and the second RF coil element are decoupled from each other and acquired.

7. The MRI system of claim 3, wherein the first RF coil element and the second RF coil element are formed to overlap each other on a base of the RF coil.

8. The MRI system of claim 1, wherein the system controller further comprises a third system controller configured to acquire an MR image of an element different from the first element and the second element.

9. The MRI system of claim 1, further comprising a cylindrical gradient coil connected to both the first system controller and the second system controller.

10. An operating method of a magnetic resonance imaging (MRI) system, the operating method comprising:

determining target elements for magnetic resonance (MR) images of an object to be acquired;

determining whether to capture MR images of the determined target elements simultaneously or sequentially; and

acquiring MR images of the target elements of the object by operating a system controller of the MRI system;

wherein the target elements are two or more different elements, and the system controller is plural in number,

wherein the plural of system controllers are different from each other,

wherein the acquiring MR images of the target elements of the object comprises generating gradient magnetic fields in x-axis, y-axis, and z-axis directions perpendicular to each other by using surface gradient (G)-coils individually connected to a number of the plural system controllers,

wherein the MRI system further comprises a first surface gradient (G)-coil and a second surface gradient (G)-coil, respectively, connected to a first system controller and a second system controller of the plural of system controllers,

wherein the first system controller is configured to control the first surface gradient (G)-coil to generate a first gradient magnetic field for capturing a first MR image of a first element, and

wherein the second system controller is configured to control the second surface gradient (G)-coil to generate a second gradient magnetic field for capturing a second MR image of a second element.

11. The operating method of claim 10, wherein the target elements are hydrogen (¹H), phosphorous (³¹P), sodium (²³Na), and carbon isotopes (¹³C).

12. The operating method of claim 10, wherein the magnetic resonance images of the target elements are simultaneously acquired by using a number of system controllers corresponding to the target elements.

13. The operating method of claim 10, the magnetic resonance images of the target elements are simultaneously or sequentially acquired by using at least one of the system controllers.