Integrated optical sensors for optoacoustic imaging of tissue

P. Dmochowski; Barrie R. Hayes-Gill; C. Li; Stephen P. Morgan; Matt Clark; John A. Crowe; Michael G. Somekh

doi:10.1117/12.572041

29 July 2004 Integrated optical sensors for optoacoustic imaging of tissue

P. Dmochowski, Barrie R. Hayes-Gill, C. Li, Stephen P. Morgan, Matt Clark, John A. Crowe, Michael G. Somekh

Proceedings Volume 5486, ALT'03 International Conference on Advanced Laser Technologies: Biomedical Optics; (2004) https://doi.org/10.1117/12.572041
Event: ALT'03 International Conference on Advanced Laser Technologies: Biomedical Optics, 2003, Silsoe, United Kingdom

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.

Citation Download Citation

P. Dmochowski, Barrie R. Hayes-Gill, C. Li, Stephen P. Morgan, Matt Clark, John A. Crowe, and Michael G. Somekh "Integrated optical sensors for optoacoustic imaging of tissue", Proc. SPIE 5486, ALT'03 International Conference on Advanced Laser Technologies: Biomedical Optics, (29 July 2004); https://doi.org/10.1117/12.572041

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