Mock final exam-general core of radiography Latest Solution

Mock final exam-general core of radiography Latest Solution shortest possible exposure time - the minimum response time of an automatic exposure control (AEC) (also called photo timing) inherent filtration (built in) - together, the filtering effect of the x-ray tube's glass envelope and its oil coolant are referred to as: periodic checks for cracks - proper care of leaded aprons includes: thermionic emission - the source of electrons with the x-ray tube is a result of: underexposed radiographic image - inadequate collimation when using the AEC often results in: extends x-ray tube life - low mAs/high kVp exposure factors, avoiding lengthy anode rotation, avoiding exposures to a cold anode tube current, target material - the total number of x-ray photons produced at the target is contingent upon: filament circuit - in which of the following portions of the x-ray circuit is a step down transformer located? grid - what's the device that is used to absorb scattered radiation produced in the patient before it reaches the IR? acts as an additional filter, reduce tube output, resulting in arcing and tube puncture - as the x-ray tube filament ages, it becomes progressively thinner due to evaporation. The vaporized tungsten is frequently deposited on the window of the glass envelope. This may: overexposure, over development - a film emerging from the automatic processor exhibits excessive density. This may be attributed to: ejects an inner shell tungsten electron - in the production of characteristic radiation at the tungsten target, the incoming electron: target angle effects - severity of the heel effect, focal spot size, heat load capacity characteristics of the x-ray tube - target material has a high atomic number and melting point, useful beam at port window, cathode assembly receives both low and high voltages. thermionic emission - NOT associated with the anode. rectifiers - in order to be used more efficiently by the x-ray tube, alternating current is changed to direct current by the: leakage radiation - radiation that passes through the tube housing in directions other than that of the useful beam is termed? Tungsten alloy - has high atomic number and melting point, can readily dissipate heat. (usual choice for target material in equipment) causes pitting or many small surface melts on the anode - vaporized tungsten on the glass envelope, loss of anode rotation, large amounts of heat to a cold anode mAs and density are directly proportional - how are mAs and radiographic density related in the process of image formation? function of developing solution - reduce the latent image to a manifest image attenuation - the reduction in x-ray photon intensity as it passes through material. grids, collimators, compression bands - used to reduce the effect of scattered radiation on the finished radiograph focal spot size - what is NOT related to radiographic contrast photon energy, grid ratio, OID - what is related to radiographic contrast? focal spot size - controls how many elements/filaments and how fine the lines are. (sharpness) developer, fixer, wash, dry - order of radiographic film processing functions of fixer in film processing - remove unexposed silver bromide crystals and hardens the emulsion cathode end - due to the anode heel effect, the intensity of the x-ray beam is greatest along the___________. sensitometry - checks correctness of developing parameters? shape distortion - misalignment of tube-part-film relationship