Title :
RF and Microwave Photonic techniques in biomedical applications
Author :
Daryoush, Afshin S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Drexel Univ., Philadelphia, PA
fDate :
March 30 2009-April 1 2009
Abstract :
This invited paper addresses various "microwave photonics" techniques developed for biomedical applications. The first application is using RF photonics technique for calibration of ultrasound transducers operating at high-frequencies without spatial field averaging compromise. In particular a broadband fiber-optic based hydrophone probe is reported for measurements of acoustic fields at the frequencies up to 100 MHz. In another application of microwave photonics, tissue spectroscopy is performed using multi-wavelength absorption and scattering in near infrared. A high speed and high power laser driver is designed with a flat frequency response using RC speed up circuits in high power lasers. Phantom experiments are performed to extract optical parameters. Multi-frequency data fitting algorithm is performed to extract optical parameters of the phantom model simulating a breast tissue. The optical parameters (mua, mus\´) are extracted with a very good accuracy. These low cost techniques are replacement for other expensive sub-centimeter spatial resolution medical imaging methods.
Keywords :
acoustic measurement; biomedical imaging; biomedical transducers; frequency response; hydrophones; microwave photonics; RC speed up circuits; RF photonics technique; acoustic fields; biomedical applications; broadband fiber-optic based hydrophone probe; flat frequency response; high power laser driver; high power lasers; microwave photonic techniques; multifrequency data fitting algorithm; multiwavelength absorption; near infrared scattering; optical parameter extraction; subcentimeter spatial resolution medical imaging methods; tissue spectroscopy; ultrasound transducers; Biomedical optical imaging; Data mining; High speed optical techniques; Imaging phantoms; Laser modes; Masers; Microwave theory and techniques; Optical scattering; Power lasers; Radio frequency;
Conference_Titel :
Sarnoff Symposium, 2009. SARNOFF '09. IEEE
Conference_Location :
Princeton, NJ
Print_ISBN :
978-1-4244-3381-0
Electronic_ISBN :
978-1-4244-3382-7
DOI :
10.1109/SARNOF.2009.4850373