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Method for positioning three-dimensional coordinate of ultrasonic probe based on magnetic resonance image

A magnetic resonance image and ultrasonic probe technology, applied in the field of biomedical engineering, can solve the problems of inability to evaluate the therapeutic effect, inability to accurately monitor the temperature of the treatment target area, inability to accurately locate the treatment ultrasonic technology, etc. The effect of small MRI distortion and localization error reduction

Active Publication Date: 2013-04-03
沈德(宁波)医疗器械科技有限公司
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Problems solved by technology

However, the development of this technology once encountered a big bottleneck problem due to the problems of precise positioning, precise monitoring of the temperature of the treatment target area, and real-time efficacy evaluation of the single therapeutic ultrasound technology.

Method used

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  • Method for positioning three-dimensional coordinate of ultrasonic probe based on magnetic resonance image
  • Method for positioning three-dimensional coordinate of ultrasonic probe based on magnetic resonance image
  • Method for positioning three-dimensional coordinate of ultrasonic probe based on magnetic resonance image

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Embodiment

[0032] A three-dimensional coordinate positioning method of an ultrasonic probe based on a magnetic resonance image, which is used for positioning the three-dimensional coordinates of the ultrasonic probe in a magnetic resonance-guided ultrasonic treatment system. During ultrasonic treatment, the ultrasonic probe is immersed in degassed water, and the diameter of the ultrasonic probe is less than 40cm , the ultrasonic probe is a plane or a spherical surface on which single-element or multi-element ultrasonic transducers (piezoelectric ceramics) are distributed (for a spherical surface, this method is aimed at a circular plane on the spherical crown). A plurality of positioning markers are distributed on the edge of the ultrasonic probe, and each positioning marker is provided with two positioning marking points. Such as Figure 1-Figure 2 As shown, the positioning markers are positioning grooves distributed on the edge of the ultrasonic probe or positioning cylinders arranged ...

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Abstract

The invention relates to a method for positioning a three-dimensional coordinate of an ultrasonic probe based on a magnetic resonance image. The method is used for positioning the three-dimensional coordinate of the ultrasonic probe in a magnetic resonance guided ultrasonic therapy system and includes the steps: 1) acquiring an image of a positioning marker on the ultrasonic probe by magnetic resonance imaging and recording image information of the image; 2) calculating a three-dimensional coordinate value of a positioning mark point on the positioning marker in an MRI (magnetic resonance imaging) coordinate system according to the image information; 3) calculating a transformational relation matrix of the MRI coordinate system and an ultrasonic therapy system coordinate system according to the three-dimensional coordinate value of the positioning mark point in the MRI coordinate system and a three-dimensional coordinate value of the positioning mark point in the ultrasonic therapy system coordinate system; and 4) positioning the three-dimensional coordinate of the ultrasonic probe according to the transformational relation matrix and the ultrasonic probe image acquired by the magnetic resonance imaging. Compared with the prior art, the method has the advantages that the therapeutic process can be accurately positioned, therapeutic safety and reliability are ensured and the like.

Description

technical field [0001] The invention relates to the technical field of biomedical engineering, in particular to a three-dimensional coordinate positioning method of an ultrasonic probe based on a magnetic resonance image. Background technique [0002] Therapeutic ultrasound is to use the penetration of ultrasound to transmit ultrasound with a certain energy to human tissues. Under the action of various physical effects such as mechanical effects, thermal effects, and cavitation effects of ultrasound, it can perform tumor treatment, thrombolysis, and microbubble drug loading. Many doctors and scientific workers believe that the wide promotion and application of therapeutic ultrasound technology will vigorously promote the progress of non-invasive treatment technology, which is an important milestone in the process of human exploration of non-invasive treatment technology . However, the development of this technology once encountered a big bottleneck due to problems such as t...

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Application Information

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IPC IPC(8): A61N7/02A61B5/055
Inventor 沈国峰陈亚珠
Owner 沈德(宁波)医疗器械科技有限公司
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