LMRT ARRT EXAM Question and answer rated A+ 2023

LMRT ARRT EXAM Question and answer rated A+ 2023Roentgen discovered x-rays while working with a _____ tube? Crookes An "electron cloud" surrounding the filament of the cathode is referred to as a Space charge Free electrons of X-ray production come from the Filament The creation of the space charge in the X-ray tube produces: thermionic emission The majority of photons in the X-ray beam are created by which process? Bremsstrahlung interactions More than 99% of the energy of the electron stream is converted into: heat the high-speed rotation (10,000 rpm) of the anode enables Greater dissipation of heat from high technical factors The degree of angulation of the x-ray tube target will determine the: size of the actual and effective focal spot A dual-focus X-ray tube has: 1: Two filaments 2: Two focal spot sizes 3: Two anodes 1 and 2 The anode heel effect is a phenomenon of X-ray production that results in: Uneven distribution of radiation within the x-ray field The penetrating power of the X-ray beam is controlled by varying the Peak kilovoltage (kVp) The rate flow of current flow across the X-ray tube is measured in mA Doubling the mA will result in 1: increased patient dose 2: twice as many photons in the X-ray beam 3: increased radiographic density 1, 2, and 3 The unit used to indicate the total quantity of X-ray expose is Millionsampere-seconds (mAs) The device for removing long-wavelength radiation from the primary X-ray beam is the Filter X-ray equipment capable of producing 70 kVp or more is required to have total filtration of at least: 2.5 mm Al equiv The purpose of rotating the anode of the X-ray tube is to Increase the heat capacity of the anode Image sharpness is determined by the Size of the effective focal spot Above 70 kVp, what percentage of photons is created by the bremsstrahlung process? 85% The amount detail seen in the X-ray image is referred to as spatial resolution Of what material is the filament made? Tungsten