LMRT ARRT EXAM QUESTIONS AND ANSWERS 100% PASS

LMRT ARRT EXAM QUESTIONS AND ANSWERS 100% PASS Roentgen 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