A technique is developed to simultaneously acquire ultrasound and photoacoustic (PA) images based on a linear transducer array. The system uses conventional ultrasound for rapid identification of potential targets. After a target is identified, the ultrasound echo and PA signals can be simultaneously obtained with optimized excitation and a signal collection sequence. The corresponding ultrasound impedance and optical absorption images are reconstructed with a phase-controlled algorithm. The approach can effectively reduce the artifacts associated with a conventional filter backprojection algorithm used in PA imaging by linear scanning. The technique provides a new approach for practical applications.
© 2004 Optical Society of America
(170.3010) Medical optics and biotechnology : Image reconstruction techniques
(170.5120) Medical optics and biotechnology : Photoacoustic imaging
(170.7180) Medical optics and biotechnology : Ultrasound diagnostics
Yaguang Zeng, Da Xing, Yi Wang, Bangzhen Yin, and Qun Chen, "Photoacoustic and ultrasonic coimage with a linear transducer array," Opt. Lett. 29, 1760-1762 (2004)