Joe, If I was to dispense a dose of medronate (used for nuclear medicine skeletal scintigraphy) what would be the activity of the dose in “Americanized” units? The industry standard is mCi (millicuries). The adoption of weights and measures by a culture is a consequence of history. There is no system of “Americanized” units for radiation dose activity or units of radiation exposure. Similarly, our other measurement units are not ours either. They’re British. We borrow here and there and call it our own. We even confuse units within our “own” system…for example, pounds and slugs. It can be bewildering. That’s why I have the handy-dandy units-converting program on my iPod Touch. However, when I work strictly within the metric system I, rarely, need a program for conversions. That’s its appeal. Dave