Improving limited-view photoacoustic tomography with an acoustic reflector
The versatility and real-time imaging capability of commercial linear array transducers make them widely used in clinical ultrasound and photoacoustic imaging. However, they often suffer from limited detection view. For instance, acoustic waves traveling at a grazing angle to the transducer surface are difficult to detect. In this letter, we propose a simple and easy approach to ameliorate this problem by using a 45-deg acoustic reflector. The reflector forms a virtual array that is perpendicular to the physical array, thereby doubling the detection coverage. The improvement in image quality in photoacoustic tomography was demonstrated through a hair phantom, a leaf skeleton phantom, and an ex vivo mouse ear experiment.
Additional Information© 2013 SPIE. Paper 130643LR received Sep. 4, 2013; revised manuscript received Oct. 9, 2013; accepted for publication Oct. 14, 2013; published online Nov. 27, 2013. The authors would like to thank Professor Ballard James for reading the manuscript. The authors would also like to thank Dr. Mohammadreza Nasiriavanaki, Mr. Guo Li, and Mr. Wenxin Xing for useful discussions and experimental assistance. This work was sponsored in part by the National Institutes of Health grants DP1 EB016986 (NIH Director's Pioneer Award), R01 EB016963, R01 EB008085, R01 CA134539, U54 CA136398, R01 EB010049, R01 CA157277, and R01 CA159959. L. W. has a financial interest in Microphotoacoustics Inc. and Endra Inc., and K. M. has a financial interest in Microphotoacoustics Inc., neither of which supported this work.
Published - JBO_18_11_110505.pdf