Reflection mode photoacoustic/thermoacoustic dual modality imaging based on a hollow concave array

Photoacoustic (PA) and thermoacoustic (TA) imaging can share a set of data acquisition processing system, in addition to different excitation sources. In this paper, reflection mode PA/TA dual modality based on hollow concave array is proposed. The signals are excited through the holes by using optical fiber dipole antenna, respectively. light, microwave received ultrasonic coaxial, forming mode. Through compensation calibration transducer crystal phase amplitude part array, 3-mm-diameter plastic tube filled with 0.9 wt.% salt water, safflower oil, human arm, back hand instep successfully imaged, separately. These experimental results show that spatial resolution system 0.33 mm, technology has potential provide absorption distribution tissues at same time which helpful accurately detecting tumor, diabetic foot other diseases, wide range clinical application prospects.