an ultrasound - detectable polymeric device that offers superior visibility of the body of the device and decreased ultrasound angle dependence through the use of microcavities and methods of manufacturing thereof is disclosed . these microcavities enable superior ultrasound visualization due to diffuse reflection of sound waves when compared to solid polymeric objects , ensuring that a strong signal is received at the source of the ultrasound transducer and providing strong image contrast throughout the entire cross - section of the implant that is also robust to variable angles of insonation .