Röntgenröhre
A "milliampere second" (mA⋅s) is a unit of measure used in X-ray imaging, diagnostic imaging, and radiation therapy. It is equivalent to a "millicoulomb". This quantity is proportional to the total X-ray energy produced by a given X-ray tube operated at a particular voltage. The same total dose can be delivered in different time periods depending on the X-ray tube current.