Systems and methods for correcting measurement artifacts in magnetic resonance thermometry

A magnetic resonance imaging and magnetic resonance technology, which is used in magnetic resonance measurement, measurement using an MRI system, and magnetic variable measurement, etc. It can solve problems such as defective heat maps, pixel image phase image effects, and medical treatment discounts.

Pending Publication Date: 2021-07-30
医视特有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, artifacts that have little effect on the pixel image may have a significant effect on the phase imag

Method used

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  • Systems and methods for correcting measurement artifacts in magnetic resonance thermometry
  • Systems and methods for correcting measurement artifacts in magnetic resonance thermometry
  • Systems and methods for correcting measurement artifacts in magnetic resonance thermometry

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Embodiment Construction

[0036] figure 1 An exemplary MRI system is shown in which techniques for performing MR thermometry and for detecting measurement artifacts in MR thermometry according to various embodiments of the invention may be implemented or used in The exemplary MRI system. The illustrated MRI system 100 includes an MRI machine 102 . If an MR-guided procedure is being performed, a medical device (eg, an ultrasound transducer) 104 may be placed within the bore of the MRI machine 102 . Since the components and operation of MRI machines are well known in the art, only some basic components that are helpful in understanding system 100 and its operation are described herein.

[0037] The MRI machine 102 generally includes a cylindrical electromagnet 106 that generates a static magnetic field within a bore 108 of the electromagnet 106 . The electromagnet 106 generates a substantially uniform magnetic field within the imaging region 110 inside the magnet bore 108 . The electromagnet 106 may ...

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Abstract

Systems and methods for performing magnetic resonance (MR) thermometry include a magnetic resonance imaging (MRI) unit (100) and a controller (124) in communication with the MRI unit (100) and configured to cause the MRI unit (100) to acquire one or more baseline phase images of an imaging region (110) and one or more treatment phase images of the imaging region (110) subsequent to a temperature change of a subregion within the imaging region (110), electronically generate a thermal map pixelwise indicating the temperature change of the subregion based at least in part on the acquired baseline phase image and treatment phase image, computationally predict the temperature change of the subregion based at least in part on energy deposited in the subregion during treatment without reference to the generated thermal map, and determine whether the thermal map is inaccurate based at least in part on the temperature change of the subregion indicated by the thermal map and the predicted temperature change of the subregion.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to and benefit of U.S. Patent Application No. 16 / 202,558 filed November 28, 2018, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to magnetic resonance (MR) imaging, and more particularly to techniques for MR thermography (or MR thermometry) and corrections in MR thermometry. Background technique [0004] MR imaging of tissues in the body can be used in many medical procedures including diagnosis and surgery. In general, MR imaging begins with placing a subject in a relatively uniform static magnetic field. This static magnetic field aligns and precesses the spins of the hydrogen nuclei in a general direction around the magnetic field. Pulses of a radio frequency (RF) magnetic field are then superimposed on this static magnetic field to alternate some of the aligned spins between temporarily energetic non-alig...

Claims

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Application Information

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IPC IPC(8): G01R33/48G01R33/56A61N7/02A61B5/01A61B5/055
CPCG01R33/4814G01R33/4804G01R33/5608A61N7/02A61B5/055A61B5/015A61N2007/0095A61N2007/0073G01R33/54
Inventor 沙哈·里诺特约阿夫·莱维
Owner 医视特有限公司
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