LMRT ARRT EXAM| 135 QUESTIONS| WITH COMPLETE SOLUTIONS

Roentgen discovered x-rays while working with a _____ tube? correct answer: Crookes An "electron cloud" surrounding the filament of the cathode is referred to as a correct answer: Space charge Free electrons of X-ray production come from the correct answer: Filament The creation of the space charge in the X-ray tube produces: correct answer: thermionic emission The majority of photons in the X-ray beam are created by which process? correct answer: Bremsstrahlung interactions More than 99% of the energy of the electron stream is converted into: correct answer: heat the high-speed rotation (10,000 rpm) of the anode enables correct answer: Greater dissipation of heat from high technical factors The degree of angulation of the x-ray tube target will determine the: correct answer: 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 correct answer: 1 and 2 The anode heel effect is a phenomenon of X-ray production that results in: correct answer: Uneven distribution of radiation within the x-ray field The penetrating power of the X-ray beam is controlled by varying the correct answer: Peak kilovoltage (kVp) The rate flow of current flow across the X-ray tube is measured in correct answer: 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 correct answer: 1, 2, and 3 The unit used to indicate the total quantity of X-ray exp