ARRT Radiology Exam 3 Questions with Correct Solutions, A+

high kVp / kilovoltage - interaction between the x ray photons and matter as illustrated in Figure 4 - 22 is most likely to be associated with picture page 220 The higher the ________the greater the exposure latitude / margin of error in exposure A.kilovoltage range B.mAs range C.grid range - A.kilovoltage range Bushong 9th edition page 256 - 257 Higher _______ produces more energetic photons, is more penetrating, and produces more grays on a radiographic image, lengthening the scale of contrasts. A.kilovoltage B.mAs C.grid - A.kilovoltage Bushong 9th edition page 256 - 257 As kilovoltage increases, the percentage of scattered radiation also increases A.kilovoltage B.mAs C.grid - A.kilovoltage Bushong 9th edition page 256 - 257 Differences inadjacent densities on the image. High _______: Few shades of gray, short scale (low kvp) Low ________: Many shades of gray, long scale (high kvp) Factors affecting: grids, beam restriction, filtration, anatomy, pathology - Contrast The active portion of a CR IP is(are): a. Calcium tungstate b. PSP c. Silver bromide crystals d. Rare earth phosphor - b. PSP photo stimulated phosphor Mosby's Comprehensive Review of Radiography: The Complete Study Guide and ... By William J. Callaway one of the biggest advantages of CR/DR is the _______ it offers a. latitude b. longitude c. Silver bromide crystals d. Rare earth phosphor - a. latitude also known as exposure latitude Shepherd page 332 With CR/DR this affords a much greater exposure latitude and technical inaccuracies can be effectively eliminated. Over exposures of up to _______ percent and under exposures of up to _____ PERCENT are reported as recoverable thus eliminating most retakes A.500 / 80 B. 80 / 80 C.50/50 D.40 / 30 - A.500 / 80 percent Shepherd page 332 in CR/DR there is a _______ relationship between the exposure given to the PSP and its resulting luminescence as it is scanned by the laser A.sigmoidal B.nonlinear C.linear D.circular - C.linear Shepherd page 332 in film there is a _______ relationship Limited by the toe and shoulder of the characteristic curve A.sinusoidal B.nonlinear C.linear D.circular - A.sinusoidal Shepherd page 332 Most of the xrays generated at the focal spot are directed downward and pass through the xray tubes ________ A.anode B.cathode C.port window D.anode bevel - C.port window Selman 9th edition page 111 Anode target material with a ______produces higher energy xrays more efficiently. A. high atomic numbers B. Lower atomic number C. medium atomic numbers - A. high atomic numbers Selman 9th edition page 111 Because a great deal of heat is produced at the target, the material should have a high melting point so as to avoid damage to the target surface - During exposure, electrons are driven by thousands of volts toward the _______, where they are suddenly _______ this process is what produces x rays A. Cathode / accelerated B. Cathode / decelerated C. Anode / accelerated - C. Anode / accelerated Bushong 9th edition page 123 The number of electrons boiled off the cathode and consequently the number of x-rays produced are controlled by: a. kVp b. SID c. mAs d. OID - c. mAs Mosby's Comprehensive Review of Radiography: The Complete Study Guide and ... By William J. Callaway The _______ focusing cup, functions to direct the liberated filament electrons to the ______ a. anode heel effect/cathode b. anode/heel of the anode denum/focal spot - denum/focal spot Shephard page 5-6; Bushong 9th edition page 126-127 The filament of the _______ assembly, which is made of thoriated tungsten and functions to liberate electrons thermionic emission when heated to white hot _______ a. anode/incandescence b. cathode/incandescence c. anode heel/anode heel effect - b. cathode/incandescence Shephard page 5-6; Bushong 9th edition page 126-127 transformers are used to change the value of _____ a. electrodes b. direct current nating current - c. alternating current