somehow collect the ultrasound wave so we have to engineer this transducer or beam combine or what we call light some combiner that allows us to combine the light optical axis and acoustic axis make them coaxial right so with a single laser shot you get an image 1d image and then you can raster scan to get a 3d image so this technology works around this point right so your penetration is about one point two millimeters but you're getting a single-digit micron resolution so this is one example where you can monitor the same animal over time so