What does mAs stand for in radiography?

In radiography, mAs stands for milliampere-seconds. This term is a crucial measurement in determining the amount of x-ray exposure that is produced during a radiographic procedure. The milliampere (mA) component reflects the current flowing through the x-ray tube, while the seconds component indicates the duration for which that current flows.

By multiplying the milliampere setting by the exposure time in seconds, you obtain a total exposure value that is directly related to both the quantity of x-rays produced and the intensity of the resulting image. Proper adjustment of the mAs value is essential in achieving optimal image quality while minimizing patient exposure to radiation.

Understanding mAs is fundamental for radiologic technologists, as it allows them to make informed decisions about exposure settings based on the specific requirements of each imaging procedure, thereby enhancing both safety and diagnostic efficacy.