LMRT ARRT Practice Exam

When the milliamperage (mA) is doubled in an X-ray imaging system, several interrelated effects occur that contribute to the overall outcome.

Firstly, increasing the mA directly increases the number of electrons produced in the X-ray tube, which in turn generates more X-ray photons. This leads to an increase in the total quantity of X-rays created during the exposure. Hence, there are indeed twice as many photons in the X-ray beam when the mA is doubled.

Secondly, an increase in photon production corresponds to an increase in the patient dose. When more photons are generated and directed towards the patient, the exposure to ionizing radiation also increases, directly correlating to a higher dose received by the patient.

Lastly, with more X-ray photons generated, the radiographic density of the image increases. This means that the resulting image will appear darker because more photons strike the image receptor, leading to a greater accumulation of exposure on the film or digital sensor.

Each of these outcomes—an increased patient dose, a doubling of photons in the beam, and an increase in radiographic density—are consequences of raising the mA. Therefore, all the individual results contribute to the overall answer that all of the outcomes take place when the mill