Electrical impedance tomography lung formation method based on 3D accelerometerTechnical field
The present invention relates to electrical impedance tomography lung imaging system field, a kind of electrical impedance tomography lung formation method based on 3D accelerometer.
Background technology
Bio-electrical impedance imaging technology is to utilize biological tissue or the electrical characteristics of organ and change thereof, extract the biomedical information relevant to pathological condition, it is after form, structure imaging, the functional imaging technology of new generation occurred in nearly 20 years, has noinvasive, continuous, radiationless, fast response time, the advantage such as with low cost.Bio-electrical impedance tomography lung imaging system principle is by injecting weak alternating current entrance human body, electric current can flow along the path that resistance is minimum, thus form current potential at body surface, utilize electrode that current potential carries out test constantly, then convert it into the fault image of pulmonary function.
Impedance tomography (EIT) lung imaging system is mainly used in noinvasive and monitors the lung image of patient continuously.It is mainly used in operating room and ICU room.The time that one feature in these places is i.e. monitored is long, and patient's attitude is uncertain；Additionally these also have another one feature to be that patient belongs to mechanical ventilation, and this ventilating mode can produce impact to end expiratory positive pressure (PEEP).The adjusting of attitude of patient is typically all by the way of doctor is manually entered by traditional impedance tomography (EIT) lung imaging system, doctor according to current pose relative to the attitude normally lain low estimation angle voluntarily, it is required for again modelling evaluation after determining attitude to calculate simultaneously every time, this mode mainly can cause following problem: 1, the attitude data input of doctor is not the most accurate, all being estimated voluntarily by doctor, error is the biggest；2, in operation process or may be regular ICU monitoring process patient replacing attitude, attitude changes and is now accomplished by doctor and re-enters timely, makes troubles to use；3, traditional equipment is required for again Modeling Calculation thus real imaging after input attitude information every time, causes in monitoring process the most continuous；4, because the cycle is the longest inside ICU room, patient's attitude sometimes changes but equipment fails to upgrade in time, and the degree of accuracy causing monitoring continuously 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 formation method based on 3D accelerometer, in normal monitoring process, system can read the positional information of 3D accelerometer while real-time reading electrode data, input location information in figure synthetic model, thus obtain new figure composition algorithm, the reconstruction of the fault image of pulmonary function is carried out according to new figure composition algorithm.
The technical scheme is that
Electrical impedance tomography lung formation method based on 3D accelerometer, it is characterized in that: the posture position information of first 3D accelerometer Real-time Collection personnel to be detected, and combine front electrode information and be transferred to the controller of electrical impedance tomography lung imaging system in the lump, according to posture position information, controller judges whether positional information changes, when changing, new positional information is input in figure synthetic model, thus obtain new figure composition algorithm, then the electrode information currently gathered is input in new figure composition algorithm, form image file, finally image file is processed the fault image obtaining pulmonary function, terminal carries out showing.
Described electrode information uses contactless electric impedance sensor to be acquired, described contactless electric impedance sensor is arranged in detection vest, described 3D accelerometer is installed in contactless electric impedance sensor, after electrical impedance tomography lung imaging system powers on, obtain the positional information of 3D accelerometer, adjust 3D accelerometer position in contactless electric impedance sensor until determining suitable installation site and fixing, the centre position of the most contactless electric impedance sensor of suitable installation site of 3D accelerometer.
When described posture position information does not change, the electrode information currently gathered directly is input in existing figure composition algorithm by controller, forms image file, finally image file is carried out image procossing, and terminal carries out showing.
Advantages of the present invention:
(1), using 3D accelerometer Real-time Collection posture position information, doctor need not the attitude information that manual input is relevant, and it is high that the angle information of attitude passes through 3D accelerometer counting accuracy voluntarily；
(2), 3D accelerometer in monitoring process from motion tracking attitudes vibration, it is not necessary to carry out the input of information frequently；
(3), the real-time tracing positional information of 3D accelerometer, adjust figure composition algorithm according to positional information in real time, make monitoring process continuous；
(4), the present invention causes coarse problem by real-time Attitude Tracking, solution in long-time monitoring process because patient changes attitude voluntarily.
Accompanying drawing explanation
Fig. 1 is the flow chart of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
See Fig. 1, electrical impedance tomography lung formation method based on 3D accelerometer, first after electrical impedance tomography lung imaging system powers on, obtain the positional information of 3D accelerometer, adjust 3D accelerometer position in contactless electric impedance sensor until determining suitable installation site and fixing, contactless electric impedance sensor is arranged in detection vest, the centre position of the most contactless electric impedance sensor of suitable installation site of 3D accelerometer；In test, detection vest is through on the body of detected personnel, the posture position information of 3D accelerometer Real-time Collection personnel to be detected, contactless electric impedance sensor acquisition electrode information, then posture position information and electrode information are transferred to the controller of electrical impedance tomography lung imaging system in the lump, according to posture position information, controller judges whether positional information changes, when changing, new positional information is input in figure synthetic model, thus obtain new figure composition algorithm, then the electrode information currently gathered is input in new figure composition algorithm, form image file, finally image file is processed the fault image obtaining pulmonary function, terminal carries out showing；When posture position information does not change, the electrode information currently gathered directly is input in existing figure composition algorithm by controller, forms image file, finally image file is carried out image procossing, and terminal carries out showing.
Wherein, 3D accelerometer is installed in contactless electric impedance sensor.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, being appreciated that and these embodiments can carry out multiple change without departing from the principles and spirit of the present invention, revise, replace and modification, the scope of the present invention be defined by the appended.