Granted Patent B2

US 12,402,803 · App. 18/536,636 · Granted Sep 2, 2025

Inventors: Qingyu Dai (Beijing, CN); Yuechen Liu (Beijing, CN); Fan Yang (Beijing, CN); Siqing Weng (Beijing, CN); Kun Wang (Beijing, CN)

Assignee: GE Precision Healthcare LLC

A61B5/055A61B5/0035A61B5/0037A61B5/0064G01R33/288

Abstract

Claims (39)

1. A magnetic resonance scanning control method, comprising:

acquiring a three-dimensional body model of a scan subject;

estimating, on the basis of the three-dimensional body model, a value of a first body parameter and a value of a second body parameter of the scan subject;

determining a specific absorption rate on the basis of a site to be scanned of the scan subject, the value of the first body parameter and the value of the second body parameter;

determining an implant location in the three-dimensional body model;

determining a root mean square value of a radio frequency field on the basis of the implant location and the site to be scanned; and

adjusting a waveform of radio frequency transmission pulses based on the determined specific absorption rate and the root mean square value of the radio frequency field.

2. The method according to claim 1 , wherein the first body parameter comprises weight and the second body parameter comprises height.

3. The method according to claim 1 , wherein the step of determining the specific absorption rate comprises:

determining a standard energy on the basis of a pre-acquired energy prediction model associated with the site to be scanned, wherein the energy prediction model is used to represent a correspondence relationship between the standard energy and different values of the first body parameter and different values of the second body parameter; and

determining the specific absorption rate of a current scan on the basis of the standard energy.

4. The method according to claim 1 , further comprising:

determining, on the basis of the three-dimensional body model, the site to be scanned of the scan subject.

5. The method according to claim 1 , wherein acquiring the three-dimensional body model of the scan subject comprises:

acquiring a three-dimensional profile image of the scan subject; and

data-fusing the three-dimensional profile image with a pre-stored standard human model to acquire the three-dimensional body model of the scan subject.

6. The method according to claim 5 , wherein the scan subject positioned on a scanning table and is photographed using a camera to acquire the three-dimensional profile image of the scan subject.

7. The method according to claim 1 , wherein the three-dimensional body model comprises a body portion as well as an information labeling portion, at least a portion of the information labeling portion being used to indicate a human anatomical site of the body portion.

8. A magnetic resonance scanning control method for a magnetic resonance system, the magnetic resonance system comprising a scanning table and a camera, and the method comprising:

acquiring, by means of the camera, a three-dimensional profile image of a scan subject on the scanning table;

acquiring a three-dimensional body model of the scan subject on the basis of the three-dimensional profile image;

estimating a weight and a height of the scan subject on the basis of the three-dimensional body model;

receiving a user operation instruction, so as to determine a site to be scanned in the three-dimensional body model;

determining a specific absorption rate on the basis of the determined site to be scanned, the weight, and the height;

receiving a user operation instruction, so as to determine an implant location in the three-dimensional body model;

determining a root mean square value of a radio frequency field on the basis of the implant location and the determined site to be scanned; and

adjusting a waveform of radio frequency transmission pulses on the basis of the specific absorption rate and the root mean square value of the radio frequency field.

9. A magnetic resonance system, comprising:

a main magnet, a radio frequency coil assembly, a gradient coil assembly, and a scanning table used to bear a scan subject;

a sequence pulse generator, used to generate a scan sequence, the scan sequence comprising radio frequency transmission pulses;

a three-dimensional imaging apparatus; and

a scanning controller, comprising operation instructions, the operation instructions being used to perform the following steps:

receiving a three-dimensional profile image of the scan subject acquired by means of the three-dimensional imaging apparatus;

acquiring a three-dimensional body model of the scan subject on the basis of the three-dimensional profile image;

estimating, on the basis of the three-dimensional body model, a value of a first body parameter and a value of a second body parameter of the scan subject;

determining a specific absorption rate on the basis of a site to be scanned of the scan subject, the value of the first body parameter, and the value of the second body parameter;

determining an implant location in the three-dimensional body model;

determining a root mean square value of a radio frequency field on the basis of the implant location and the site to be scanned of the scan subject; and

adjusting a waveform of the radio frequency transmission pulses on the basis of the specific absorption rate and the root mean square value of the radio frequency field.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (12)