Design Of A Wearable 2-D Ultrasonic Transducer Array For Bladder Measurement

This paper presents the transducer design of diagnostic devices worn on patients with difficulty in bladder diagnosis using an ultrasound diagnostic device for medical purposes. A 5 x 5 transducer of 70 mm x 60 mm was fabricated to investigate a large area and apply it to an inexpensive imaging system. Each channel had a center frequency of 2 MHz, and the theoretical and simulation results were compared through analysis using the frequency characteristics. The transducer uses a PZT-based piezoelectric element and has a narrow bandwidth; thus, the bandwidth is increased by applying a matching layer and a backing layer at the front and back, respectively. The analysis results of the time domain characteristics of the same model were compared with those of the frequency characteristics. The model designed through simulation showed the possibility of measuring a patient's bladder in real time through an ultrasonic examination using an actual diagnostic device.