Photoacoustic Technology For Tomographic Imaging And Spectroscopy Study

Photoacoustic technique in biomedical diagnosis has become an active research field because of the advantages of high sensitive and noninvasive, so it has been gained such degree applications. In this paper, a new method has put forward in optical tomography and a new application put forward in spectroscopic analysis. Main contents of this paper are as follows:1. It has put forward a imaging method of acoustic lens using photoacoustic signal and according to the Kirchhoff diffraction theory we deduced pulse response of acoustic lens.2. Designed acoustic imaging system, it is demonstrated that using acoustic lens imaging is feasible through measuring these sound fields distributing of single dot body and three dots body. According to experiment condition ,calculated the numerical value of sound field distributing, When analyzing the distributing of three dots body in same plain, we must do point correction. It is indicated that the sound distributing of numerical value and correction's is comparative.3. Designing photoacoustic imaging system,we have got photoacoustic imaging of body in turbid solution and a heterogeneous object in biological tissue, and analyzing the resolution of imaging.4. Put forward a technique of derivative photoacoustic spectrum and developed a set of derivative photoacoustic spectrum experiment system. Through a great deal of experiment, we had gained some importance data and approved the design is rational.