This bachelor assignment presentation discusses an approach to make pessary rings more visible on ultrasound images. This approach suggests to 3D print the pessary ring, which allows for patient-specific rings and rapidly iterating over different surface modifications of the pessary. The approach focuses on making the surface a diffuse reflector for ultrasonic waves.
This is achieved by constructing a so-called Quadratic Residue Diffuser (QRD). The ultrasound visibility of a 3D printed QRD plate was simulated and tested and compared with an unmodified flat surface, and two other types of reflectors.
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