IEEE Transactions on Biomedical Engineering

Test Article
An Ellipsoidal Focused Ultrasound Transducer for Extend-Focus Photoacoustic Microscopy
This study propose an ellipsoidal focused ultrasound transducer (EUT) to solve the problem of sharp attenuation of transducer sensitivity and lateral resolution when transducer away from the focus position. Traditional high numerical aperture spherical focused ultrasound transducers (SUT) are widely used in photoacoustic microscopy (PAM) to provide high resolution, but their imaging field of view is limited. We verified the improvement of sound field distribution through simulation and hydrophone experiments. The improvement of the PAM system is proved by the phantom and in vivo experiment, which has great potential for promoting in vivo rapid-noninvasive PAM to clinical development... Read more