Fluoroscopy ARRT Comprehensive Exam With Correct Updated Answers 2024.

what mag modes are available? - Answer if you have a 16" II, you can have 12,9,6, and 4.5 " Compton effect - Answer hits the outer electron, incomplete transfer of energy, electron released and a low energy xray is deflected photoelectric absorption - Answer x-ray totally absorbed by inner shell electron, x-ray overcomes binding energy and knock out the electron and an outer shell electron takes it place. When the outer electron moves to its new place, a characteristic x-ray is formed what is the product of photoelectric absorption? - Answer electron flying , characteristic x-ray, and positive ion coherent scatter - Answer aka Thompson scatter, Rayleigh scatter or classical scatter. x-ray is absorbed by entire atom and is sent off in another direction with no energy loss does coherent scatter result in patient dose? - Answer No, this reaction only causes excitation of the atoms shells, but there is not energy transfer nor does the x-ray lose energy ( isotropic) what is the chance of coherent scatter occurring? - Answer 5% attenuation - Answer the drop of intensity of the beam due to absorption and scatter photoelectric interaction is dependent on - Answer Z^ 3 and 1/E^3 as photon energy increases there is more - Answer penetration and a decrease in tissue interactions