System and position tracing method for dynamic positioning and tracing internal miniature apparatus

A micro-device and dynamic positioning technology, which is applied in application, medical science, diagnosis, etc., can solve the problems of increasing the volume of internal devices, limiting the use range, and small battery size, so as to achieve time and space, improve efficiency, and simple operation Effect

Inactive Publication Date: 2004-03-17
CHONGQING UNIV
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Problems solved by technology

[0004] However, whether these systems emit electromagnetic waves from the body or place sensors in the body to detect electromagnetic field parameters, they all involve the problem of energy supply in the body: if a battery is used, the battery cannot be small in size and the power supply time is long; The size of the device, and the efficiency is very low; if the external power supply is directly introduced into the body with a w

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  • System and position tracing method for dynamic positioning and tracing internal miniature apparatus
  • System and position tracing method for dynamic positioning and tracing internal miniature apparatus
  • System and position tracing method for dynamic positioning and tracing internal miniature apparatus

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[0024] The device according to an embodiment of the present invention includes an external magnetic field sensor fixing frame 2 and four magnetic sensor units 21, 22, 23 and 24 fixed on 2, such as figure 1 And shown in Figure 2. Among them, the outer contour of the sensor fixing frame adopts a cube structure. This kind of cube frame can not only be fixed on the human body conveniently, but also establish a spatial rectangular coordinate system, coordinate system and Figure 4 The coordinate system is the same, the origin of the coordinate is on the vertex of the frame where the sensor unit 23 is located; the magnetic field sensor unit (21, 22, 23 and 24) fixed on the frame, each position in the human organ 3 and the micro device 4 in the human body Both have the spatial coordinates and orientation of the reference coordinate system provided by the frame 2. In order to make the magnetic field sensor fixed on the frame cover the location area as fully as possible, the four sensor gr...

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Abstract

The present invention is system and method of dynamically positioning and tracking miniature device inside body. The system includes permanent magnet fixed onto the device inside body, at least three magnetic field sensor units fixed outside body, signal processing, A/D converting and calculating unit wired or radio connected to the magnetic field sensor units, and output device to display the motion locus of the device inside body. The present invention realizes the dynamical positioning and tracking via detecting the strength of magnetic field the device inside body produces, processing and converting detected signal, calculating the spatial coordinates of the permanent magnet inside body based on magnetic dipole model and relevant calculation formula, determining the position of the miniature device continuously and display the 3D motion locus of the miniature device. The present invention is used for check of patient.

Description

Technical field [0001] The invention relates to a system and a positioning tracking method for determining the position of a micro device in the body by detecting a magnetic field, and dynamically tracking the motion trajectory of the micro device in the body. The invention belongs to the field of medical device auxiliary technology. Background technique [0002] The accurate positioning of the micro-devices in the patient's body is of great significance in clinical medicine and medical research. So far, in terms of positioning technology of micro-devices in patients, ultrasound imaging technology positioning, nuclear medicine imaging technology (such as CT, MR, etc.) positioning, fluorescence contrast positioning and other technologies are generally used. However, these technologies have the disadvantages of high cost, complicated operation, and not suitable for long-term dynamic positioning observation. [0003] In order to effectively overcome these weaknesses, various technol...

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Application Information

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IPC IPC(8): A61B5/06
Inventor 侯文生彭承琳郑小琳皮喜田彭小燕崔建国樊华吴旭东刘艳
Owner CHONGQING UNIV
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