LMRT ARRT Comprehensive Exam Review |Question and Answers| VERIFIED!!

LMRT ARRT Comprehensive Exam Review |Question and Answers| VERIFIED!! Roentgen discovered x-rays while working with a _____ tube? *Ans* Crookes An "electron cloud" surrounding the filament of the cathode is referred to as a *Ans* Space charge Free electrons of X-ray production come from the *Ans* Filament The creation of the space charge in the X-ray tube produces: *Ans* thermionic emission The majority of photons in the X-ray beam are created by which process? *Ans* Bremsstrahlung interactions More than 99% of the energy of the electron stream is converted into: *Ans* heat the high-speed rotation (10,000 rpm) of the anode enables *Ans* Greater dissipation of heat from high technical factors The degree of angulation of the x-ray tube target will determine the: *Ans* 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 *Ans* 1 and 2 The anode heel effect is a phenomenon of X-ray production that results in: *Ans* Uneven distribution of radiation within the x-ray field The penetrating power of the X-ray beam is controlled by varying the *Ans* Peak kilovoltage (kVp) The rate flow of current flow across the X-ray tube is measured in *Ans* 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 *Ans* 1, 2, and 3 The unit used to indicate the total quantity of X-ray expose is *Ans* Millionsampereseconds (mAs) The device for removing long-wavelength radiation from the primary X-ray beam is the *Ans* Filter X-ray equipment capable of producing 70 kVp or more is required to have total filtration of at least: *Ans* 2.5 mm Al equiv The purpose of rotating the anode of the X-ray tube is to *Ans* Increase the heat capacity of the anode Image sharpness is determined by the *Ans* Size of the effective focal spot Above 70 kVp, what percentage of photons is created by the bremsstrahlung process? *Ans*