We propose an image reconstruction method based on TR.

It is for a PAE catheter with a single-element NFU transducer with circular scanning.

The back-propagation of PA waves emitted from the tissues was modeled and simulated.

The collected PA pressure data was interpolated to improve the image quality.

The SSIM is at least 65% higher than FBP, while the time cost is 16 times of FBP.