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Method and apparatus for generating a signal indicative of motion of a subject in a magnetic resonance apparatus

A technology of magnetic resonance, objects, applied in the direction of ultrasound therapy, medical science, therapy, etc.

Inactive Publication Date: 2013-10-30
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This technique has been used for correction of fMRI data, but not in the context of image-guided therapy

Method used

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  • Method and apparatus for generating a signal indicative of motion of a subject in a magnetic resonance apparatus
  • Method and apparatus for generating a signal indicative of motion of a subject in a magnetic resonance apparatus
  • Method and apparatus for generating a signal indicative of motion of a subject in a magnetic resonance apparatus

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Embodiment Construction

[0025] exist figure 1 is a schematic representation of a magnetic resonance tomography apparatus operable according to the invention. The structure of the magnetic resonance tomography apparatus corresponds to that of a conventional tomography apparatus, and the differences are described below. The basic field magnet 1 generates a time-continuous strong magnetic field for polarizing or aligning atomic nucleus spins in an examination region of an object, for example a part of a patient P to be examined. The high homogeneity of the basic magnetic field required for magnetic resonance measurements is defined in a spherical measurement volume M into which a patient P is introduced for examination. To meet uniformity requirements, and especially to eliminate time-invariant effects, ferromagnetic shims are attached in place. Time-varying effects can be eliminated by shim coils 2 , which are driven by a shim power supply 15 .

[0026] A cylindrical gradient coil system 3 consistin...

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PUM

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Abstract

In a method and magnetic resonance (MR) apparatus for implementing an MR-guided procedure, an MR-compatible digital camera is placed in the patient receiving opening of the MR data acquisition unit that is operated to acquire MR data for reconstructing images that are used to guide the MR-guided intervention. The digital camera is operated to obtain digital images of the exterior of the patient, from which motion of the patient is detectable. The images are analyzed in a processor to identify therefrom the motion of the patient and the result of the analysis is represented as a processor output that is used to control the timing, with respect to the motion of the examination subject, of the occurrence of at least one event in the MR-guided procedure. One important application is respiratory gating / triggering of HIFU sonication for the treatment of moving organs.

Description

technical field [0001] The present invention relates to generating a signal indicative of the motion of a subject in a magnetic resonance (MR) apparatus, and in particular to generating such a signal for triggering an event in an MR bootstrap. Background technique [0002] Various programs are carried out by interacting with the examination subject while the examination subject is in the magnetic resonance system, ie while the subject is within the data acquisition unit of the magnetic resonance system. An example of such a procedure is treatment with High Intensity Focused Ultrasound (HIFU). [0003] The principle of HIFU therapy is to focus high sound intensity in a focal point with dimensions of a few millimeters in order to produce a strongly localized mechanical or thermal effect. The treatment is performed using an external energy source as well as propagating ultrasound beams. When performing the therapy to apply HIFU to a focal point in tissue that is in motion, eg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N7/02
CPCA61N7/02A61B19/5212A61B19/50A61B2019/4036A61N2007/0086A61B2019/5236A61B2019/521A61B2019/5214A61B19/5202A61B2090/0436A61B2090/3612A61B90/30A61B2090/309A61B90/361A61B34/10A61B2090/374
Inventor V·奥博鲁克斯M·维亚伦L·皮特鲁斯卡R·萨洛米尔
Owner SIEMENS AG
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