Electrical impedance tomography lung imaging method based on 3D accelerometerTechnical field
The present invention relates to electrical impedance tomography lung imaging system field, specifically a kind of electrical impedance tomographies based on 3D accelerometerLung imaging method.
Background technique
Bio-electrical impedance imaging technology is the electrical characteristics and its variation using biological tissue or organ, is extracted and pathology shapeThe relevant biomedical information of condition is the Yu Jin 20 years functional imaging technologies of new generation occurred after form, structure imaging,Has many advantages, such as noninvasive, continuous, radiationless, fast response time, low in cost.Bio-electrical impedance tomography lung imaging system principle isEnter human body by injecting weak alternating current, electric current can be flowed along the smallest path of resistance, thus be formed in body surfaceCurrent potential carries out test constantly to current potential using electrode, then converts it into the fault image of lung function.
Impedance tomography (EIT) lung imaging system is mainly used for the lung image of noninvasive continuous monitoring patient.Main application existsOperating room and the room ICU.One feature in these places is that the time of monitoring is long, and patient's posture is uncertain；In addition these there are also anotherAn outer feature is that patient belongs to mechanical ventilation, and this ventilating mode can have an impact end-expiratory positive pressure (PEEP).TraditionalImpedance tomography (EIT) lung imaging system is typically all the doctor in such a way that doctor is manually entered to the adjustment of the posture of patientEstimation angle according to current pose relative to the posture normally to lie low voluntarily, while determining that posture requires again later every timeModelling evaluation calculates, and this mode can mainly cause following problem: 1, the attitude data input of doctor be not it is very accurate,It is all voluntarily to be estimated by doctor, error is very big；2, in the course of surgery or ICU monitoring process patient may be frequentProperty replacement posture, posture change just needs doctor timely to re-enter at this time, make troubles to using；3, traditional equipmentModeling Calculation is required again after input posture information every time to really be imaged, causes not enough to connect in monitoring processIt is continuous；4, because the period is very long inside the room ICU, patient posture changes sometimes but equipment fails to timely update, the company of causingThe accuracy of continuous monitoring is inadequate.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of electrical impedance tomography lung imaging method based on 3D accelerometer,In normal monitoring process, system can read the location information of 3D accelerometer while reading electrode data in real time, by positionConfidence breath is input in figure synthetic model, to obtain new figure composition algorithm, is carried out according to new figure composition algorithmThe reconstruction of the fault image of lung function.
The technical solution of the present invention is as follows:
Electrical impedance tomography lung imaging method based on 3D accelerometer, it is characterised in that: first 3D accelerometer acquire in real time toThe posture position information of testing staff, and combination front electrode information is transferred to the control of electrical impedance tomography lung imaging system togetherDevice, controller judges whether location information changes according to posture position information, and when changing, new location information is inputtedInto figure synthetic model, to obtain new figure composition algorithm, then by the electrode information input currently acquired to newIn figure composition algorithm, form image file, finally handled to obtain the fault image of lung function to image file, terminal intoRow display.
The electrode information is acquired using contactless electric impedance sensor, and the contactless electrical impedance passesSensor is set in detection vest, and the 3D accelerometer is installed in contactless electric impedance sensor, in electrical impedance tomographyAfter lung imaging system powers on, the location information of 3D accelerometer is obtained, adjusts 3D accelerometer in contactless electric impedance sensorPosition until the suitable installation site of determination and fixation, suitable installation site, that is, contactless electric impedance sensor of 3D accelerometerMiddle position.
When no change has taken place for the posture position information, electrode information input that controller directly will be acquired currentlyInto existing figure composition algorithm, image file is formed, image procossing finally is carried out to image file, terminal is shown i.e.It can.
Advantages of the present invention:
(1), posture position information is acquired using 3D accelerometer in real time, doctor does not need manually to input relevant posture letterThe angle information of breath, posture is high by the counting accuracy of 3D accelerometer voluntarily；
(2), 3D accelerometer automatically tracks attitudes vibration in monitoring process, without frequently carrying out the input of information；
(3), the real-time tracing positional information of 3D accelerometer, figure composition algorithm is adjusted according to location information in real time, makes to superviseShield process is continuous；
(4), the present invention is solved in long-time monitoring process by real-time Attitude Tracking because patient voluntarily changes postureAnd cause inaccurate problem.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, completeSite preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based onEmbodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every otherEmbodiment shall fall within the protection scope of the present invention.
See Fig. 1, the electrical impedance tomography lung imaging method based on 3D accelerometer, first in electrical impedance tomography lung imaging systemAfter electricity, the location information of 3D accelerometer is obtained, adjusts position of the 3D accelerometer in contactless electric impedance sensor until trueFixed suitable installation site and fixation, contactless electric impedance sensor are set in detection vest, the suitable installation of 3D accelerometerPosition, that is, contactless electric impedance sensor middle position,；In test, it will test vest and be through on the body of detected personnel,3D accelerometer acquires the posture position information of personnel to be detected in real time, contactless electric impedance sensor acquisition electrode information, soPosture position information and electrode information are transferred to the controller of electrical impedance tomography lung imaging system together afterwards, and controller is according to postureLocation information judges whether location information changes, and when changing, new location information is input in figure synthetic model,To obtain new figure composition algorithm, then by the electrode information input currently acquired into new figure composition algorithm, shapeAt image file, finally image file is handled to obtain the fault image of lung function, terminal is shown；Work as postureFor location information when no change has taken place, controller is directly by the electrode information input currently acquired to existing figure composition algorithmIn, image file is formed, image procossing finally is carried out to image file, terminal is shown.
Wherein, 3D accelerometer is installed in contactless electric impedance sensor.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be withA variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understandingAnd modification, the scope of the present invention is defined by the appended.