With all the radiation detectors all over the highways (Albuquerque has a bunch on interstate 25) I would want to put it in a box with a lot of lead when using it out in the field. Otherwise a bunch of goons in black with machine guns will stop your car. Some people who have had heart imaging done have been pulled over, it's mildly radioactive for a number of days. If their heart was giving them trouble they really had a heart attack after being pushed to the ground and machine guns held at their heads.