Do you know what the radiation output of the DVis is rated at? Also do you know that radiation levels drop off logarithmically at 6 feet? Portable Xrays are taken all the time in pt rooms, ER and ICU without lead walls or lead screens. Everybody is asked to move away and the tech throws on a lead vest because they are the closest. An announcement is made that an Xray is being made and to move away. All efforts are made to reduce exposure. If you are more than 6' away your exposure is minimal(not zero). I work in a Cath Lab every day and this information is from our Radiation exposure inservice. Personally I can't wait for the DVis to be approved and installed in our labs. I'll probably be retired before it happens. Why? Because I'll be paying of my mortgage from this stock and retiring to make wine.