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.
CN103372267AInactive Publication Date: 2013-10-30SIEMENS AG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SIEMENS AG
Publication Date
2013-10-30
Estimated Expiration
Not applicable · inactive patent

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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.
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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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