Five years ago we delivered our first custom system to the KRISS : Korea Research Institute of Standards and Science in Daejeon. It is pictured here with a linear accelerator as the source. It was our first experience with x-ray acoustics. The goal of x-ray acoustics is to generate 3D maps of the absorbed x-rays to help to refine radiation therapy. Thank you Chulhong Kim for having such early trust in our company.