Interested target body stereo positioning method for electrical impedance mapping imaging
A technology of interest target and stereo positioning, which is applied in the field of electrical impedance imaging target stereo positioning, which can solve the problems of insufficient mining of detection information, inability to reflect depth information, and inability to locate the target of interest.
Inactive Publication Date: 2014-06-18
FOURTH MILITARY MEDICAL UNIVERSITY
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The "bright blob" in the grayscale map of the two-dimensional map can reflect the plane relative position of the object of interest, but it cannot reflect the depth information, so the object of interest cannot be located relatively accurately
At present, in the research of electrical impedance mapping imaging at home and abroad, it is limited to use two-dimensional grayscale mapping images to judge the relative position of the object of interest in the plane, because the detection information has not been fully excavated, and the stereo positioning of the object of interest cannot be performed.
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[0033] In order to further illustrate the features and advantages of the present invention, this embodiment provides a stereoscopic estimation scheme for abnormal impedance objects of interest (lesion mass) during tissue electrical impedance mapping imaging detection.
[0034] figure 1 is the equivalent schematic diagram of bioelectrical impedance mapping detection. The electrical impedance characteristics of normal tissues are significantly different from those of diseased tissues. It can be approximately considered that normal tissues are evenly distributed in the detection area. If there is a lesion mass, it will cause local electrical impedance disturbances, called It is the object of interest, and it is assumed that the object of interest is an approximate sphere. The following are the specific solution steps:
[0035] Step 1: According to the detection conditions of electrical impedance mapping imaging, establish Maxwell's equations to describe the electromagnetic field...
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The invention discloses an interested target body stereo positioning method for electrical impedance mapping imaging. The interested target body stereo positioning method comprises the following steps of: firstly, performing computational analysis based on an electromagnetic field computational model, and establishing an interested target body depth approximate solution formula; secondly, determining the two-dimensional space position of an interested target body during actual measurement of electrical impedance mapping imaging according to gray level images; and finally, solving to obtain stereo positioning information of the interested target body by establishing and utilizing a method for computing parameters in an electrical impedance mapping detection imaging measured data equivalent representation depth solving formula on the basis. The interested target body stereo positioning method is characterized in that the depth of the interested target body can be measured and calculated by deeply mining detection information on the basis of analysis of features of the two-dimensional gray level images, and stereo positioning of the interested target body is realized.
Description
technical field [0001] The invention relates to a stereotaxic method for an electrical impedance imaging object, in particular to a stereotaxic method for an interested object in electrical impedance mapping imaging. Background technique [0002] Electrical impedance mapping imaging detection is usually used to obtain a two-dimensional grayscale mapping image of the measured area. The detection electrode used is a flat array electrode (including multiple microelectrode units), and the detection electrode array extracts the body surface current signal of the measured area , by analyzing the current difference between each unit to obtain a two-dimensional gray-scale mapping image reflecting the target bulk electrical impedance distribution under the measured area. If there is an abnormal impedance disturbance area (called the object of interest) under certain detection electrode units in the electrode array, these detection electrode units will obtain a larger current signal t...
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IPC IPC(8): A61B5/053A61B5/05
Inventor 季振宇董秀珍史学涛尤富生付峰刘锐岗王威王楠马航
Owner FOURTH MILITARY MEDICAL UNIVERSITY