NDLI: A 2D optical ultrasound array using a polymer film sensing interferometer

Content Provider	IEEE Xplore Digital Library
Author	Beard, P.C. Mills, T.N.
Copyright Year	2000
Description	Author affiliation: Dept. of Med. Phys. & Bioeng., Univ. Coll. London, UK (Beard, P.C.)
Abstract	A 2D optical ultrasound receive array has been investigated. The transduction mechanism is based upon the detection of acoustically-induced changes in the optical thickness of a thin polymer film acting as a Fabry Perot interferometer (FPI). A sensor head employing a medium finesse polymer film FPI has been fabricated and characterised. By illuminating the interferometer with a large diameter (12 mm) laser beam and raster scanning a photodiode across the reflected output beam, a 2D ultrasound array was simulated. To demonstrate the concept, the ultrasound field distributions at various distances from the focus of a 5 MHz focussed ultrasound transducer were mapped. The system was also evaluated by performing transmission ultrasound imaging of several targets of known dimensions. The "array" aperture, defined by the dimensions of the incident optical field, was 12 mm in diameter and spatially sampled in 0.1 mm steps. Element sizes, defined by the photodiode aperture, were 0.4 mm for the focussed transducer measurements and 0.8 mm for the transmission ultrasound images. The wideband (30 MHz) noise-equivalent-pressure was 3 kPa and the acoustic bandwidth 12 MHz. It is considered that this approach has the potential to be used for transmission medical ultrasound, biomedical photoacoustic imaging and ultrasonic field characterisation applications.
Starting Page	1183
Ending Page	1186
File Size	354892
Page Count	4
File Format	PDF
ISBN	0780363655
ISSN	10510117
DOI	10.1109/ULTSYM.2000.921534
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-10-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical arrays Optical films Optical polymers Optical sensors Ultrasonic imaging Polymer films Optical interferometry Biomedical optical imaging Ultrasonic transducer arrays Focusing
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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