Biomedical Engineering Seminar: Capacitive Micro Machined Ultrasonic Transducers and Systems for Imaging and Surgery

Biomedical Engineering Seminar:
Jingkuang Chen, PhD, Principle Engineer, Johnson & Johnson
Thursday, February 12th, 11:00am, Fisher 132
“Capacitive Micro Machined Ultrasonic Transducers and Systems for Imaging and Surgery”
Sponsored by the Department of Biomedical Engineering

This talk will highlight the development of capacitive micromachined ultrasonic transducer (CMUT) arrays for clinical use that delivers diagnostic information, including anatomy images with a better contrast and resolution, as well as therapeutic and surgical functions not available from conventional piezoelectric tools. Examples of these devices include a tiny panoramic CMUT endoscope integrated with high-intensity focused ultrasound capability for arrhythmia diagnosis and surgery, a needle-shaped CMUT array that is smaller than a human hair for imaging, brain blood-flow-rate measurement, or hearing aids, and a CMUT photoacoustic imager. Using photon-induced acoustic waves for image reconstruction, photoacoustic imaging can capture images of blood and calcification cluster, and is exceptionally useful for identifying diseases/abnormalities related to blood, such as internal bleeding from pre-stroke or early-stage cancer. A novel architecture for photoacoustic imaging has been developed allowing light illumination through an infrared-transparent CMUT array, resulting in a compact portable modality suitable for ambulance and other field use. A broader spectrum on the clinical use of
CMUT technology will also be discussed, including the concept of wearable ultrasound patch for soft/hard tissue regeneration or wound healing.