here started with the motivation and challenges in your field I talked about photoacoustic CT photo QC microscopy in two forms time reversal and what we call cup compressed ultra-fast photography Washington University requires me to discuss my financial financial interest with two companies which have commercialized the photo because it photoacoustic tomography and we're funded by NIH through various projects thank you very much I'll be happy to entertain any questions if there's any oh it's hard for me to see