Research On The Technology Of Noninvasive Noncontact Encephalic Function Detection

The encephalon is the most advanced structure in the nature. It's the source of wisdom. Research of the encephalon science has extraordinary significance.It is the front edge of science.Such research needs the support of relative detection technology. The advancement of encephalon science follows development of detection technology. The goal of this research project is to develop new device and new method to encephalic function detection to supply traditional technology of encephalic function detection. Hence, detection will become safer and more convenient, and detection device will become more economical and more practical.In the article, the author put forward the concept of "Biotic Electric Interface", reviewed and studied modern encephalic function detection technologies and devices comprehensively, and compared among them, it gave the theoretic support and guide, hence, the route based on NIRS physiologic detection technology was set down. The author expatiated the theory, the development and physiologic detection application of NIRS technology, expatiated and analyzed fNIRS technology which is the application of NIRS on the encephalic function detection, summarized physiological theory of fNIRS detection, analyzed development and shortcoming of modern fNIRS technology, and brought forward improving project.fNIRS is a brand-new technology of encephalic function detection, its history is short, it is still immature, and its application status and detection result is not as good as traditional technologies of encephalic function detection. But fNIRS is easy to operate without radiation and without high-intensity electric or magnetic field. It is electromagnetic disturbance-proof. Its device is comparatively cheap and convenient. So, fNIRS has much potential to develop. The author researched current technology of NIRS physiologic detection carefully, analyzed the theory of blood detection, and put forward the method of focusing NIRS physiologic detection, such method improved detection resolution. The new method made use of photography theory, lessened the disturbance of environment light to the device greatly, hence, the detector can leave the surface of organism, and need no covering, need no strict darkroom environment, and it provided noncontact detection method, so it provided the feasibility of a detection mode with freely movable emitter/detector and channel-scanned style, hence, it provided advantage of resolution promotion, and it also provided convenience to patients, doctors and detection process.Monte Carlo method was used to analyze new design, and practical experiments were also used to check the design.In the research, the real device was manufactured, and the experiment of blood current detection and function detection were done on the animal and the human body, experiment results were analyzed and proved, and safty evaluation was also done.In the article, the author introduced the structure of device, the theories and machining process of all device parts.The author also described all experiments and analyzed the experiment results, and nice feature of focusing NIRS was proved.Finally, the author forecasted the prospection of fNIRS technology, designed integrated structure of channel-scanned fNIRS in advance, and planned the work of next stage.