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Proceedings Paper

Integrated optical sensors for optoacoustic imaging of tissue
Author(s): P. Dmochowski; Barrie R. Hayes-Gill; C. Li; Stephen P. Morgan; Matt Clark; John A. Crowe; Michael G. Somekh
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Paper Abstract

The design of a single integrated lock-in pixel with a logarithmic response for a modulated light camera is described. The sensor has been designed to detect low light levels and can detect modulated light with frequency well above 2 MHz. An n-well photodiode, amplifier, mixer and 150 Hz low-pass filter have been implemented to allow continuous processing of the incident light. The performance of the sensor is demonstrated using an optoacoustic imaging system and tissue phantoms. A 1 MHz ultrasound transducer is used to modulate light scattered through a tissue phantom. An absorbing sphere is scanned through the medium and the improvement in imaging performance provided by ultrasound modulation is demonstrated.

Paper Details

Date Published: 29 July 2004
PDF: 6 pages
Proc. SPIE 5486, ALT'03 International Conference on Advanced Laser Technologies: Biomedical Optics, (29 July 2004); doi: 10.1117/12.572041
Show Author Affiliations
P. Dmochowski, Univ. of Nottingham (United Kingdom)
Barrie R. Hayes-Gill, Univ. of Nottingham (United Kingdom)
C. Li, Univ. of Nottingham (United Kingdom)
Stephen P. Morgan, Univ. of Nottingham (United Kingdom)
Matt Clark, Univ. of Nottingham (United Kingdom)
John A. Crowe, Univ. of Nottingham (United Kingdom)
Michael G. Somekh, Univ. of Nottingham (United Kingdom)

Published in SPIE Proceedings Vol. 5486:
ALT'03 International Conference on Advanced Laser Technologies: Biomedical Optics
Ruikang K. Wang; Jeremy C. Hebden; Alexander V. Priezzhev; Valery V. Tuchin, Editor(s)

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