Photoacoustic/ultrasonic dual modality endoscope with a spherical hollow PVDF based transducer
Dual modality photoacoustic/ultrasonic endoscopy has shown to be effective in the identification and staging of colorectal intramural tumors. In this study, we proposed a dual modality endoscope with a spherical hollow PVDF based transducer, which achieves center frequency of 34 MHz and 6 dB bandwidth of 15 60 MHz. The PVDF based transducer will enable the system to achieve a large radial imaging range of more than 1 cm. In vivo imaging of the rabbit rectum proved that the dual modality endoscope has the ability to perform the tissue stratification of the intestinal wall and the high resolution visualization of the intestinal wall vascular network.
BiOS