A4:-NMLmS Tissue Transparency Ultrasound Energy Range in Soft Tissue lum 100um 1cm 100m 1-20 keV X-ray Radio-frequency 1-30 keV ndent 30 keV-20 MeV 1A 100A lum 100um 1cm Im 100m above 20 MeV ir Production) damaging C-H harmless bond energy Windows of transparency in imaging via sound and electromagnetic radiation.The vertical scale measures absorption in tissue. A very high energy photon interacts with a nucleus to create an electron/positron pair.The mass of each particle is 9.11 x 100-31 kg.So the minimum photon energy is: E=2×9.11x10"kg×x10'm%c)》