LMRT State (Actual) Exam Graded A+

spatial resolution is improved when - ANSWER-SID increases the adoption of a DICOM standard in the medical imaging industry was designed to - ANSWER-allow various vendors to share digital data with out proprietary software constrains. Most AECS utilize ___ ion chambers in various combinations. - ANSWER-Three Shape distortion is caused by ? A. as the ratio of SID and SOD B.using the tube angle and OID C.automatically in the computer post processing - ANSWER-none of the above Filament materials are chosen primarily for their - ANSWER-high melting points to view the human body in the three dimensions , at least _ images is /are required - ANSWER-two Large patients receive a greater exposure than small patients because their A.SOD is decreased B.OID is increased C.entrance skin surface is closer to the source - ANSWER-all of the above leakage radiation from the lead-lined housing must not exceed - ANSWER-100mR/hr measured at 1 meter Immediately after exposure and before a digitally acquired image is post-processed , the initial image shown - ANSWER-very low contrast the single most important factor in efficient silver recovery is the - ANSWER-fixer dwell time ionization chamber work on the principle that when radiation interacts with the electrons in air , _ are produced - ANSWER-ion pairs A CR imaging plate that has been grossly overexposed can demonstrate _ if the erasure process is incomplete - ANSWER-ghosting the build-up of tungsten deposits on the inside of an aged X-ray tube adds to the - ANSWER-inherent filtration the greatest factor in the production of scatter radiation is - ANSWER-patient thickness Performing a routine chest radiograph in the AP projection will - ANSWER-produce improved resolution of the thoracic spine Compton scattering occurs when an incident x-ray photon interacts with an _ electron - ANSWER-outer shell electron with low binging energy and high kinetic energy Neon lights illustrate the fact that electrons will flow - ANSWER-in a gaseous environment all of the following are true of induction motors except A.they use multiphase current and can turn at varying rpm. B.motor power can be regulated by the characteristics of the electromagnets that make up the stator. C.Their design is inherently weak with regard to power D.They are used to spin the X-ray tube anode disk - ANSWER-C convert 540.7 to scientific notation - ANSWER-540.7 x 10-2 American generators operate at - ANSWER-60 Hz Driving the thermionic cloud from the cathode to the anode requires? - ANSWER-a small amperage extreme overexposure to a DR detector can result in - ANSWER-detector DEL saturation which of the following interactions has a significant impact on the x-ray image A.photoelectric absorption B.coherent scatter C.pair production D.photodisintegration - ANSWER-A. Photoelectric absorption what would be inconsistent with the "scope of practice" of the radiographer? - ANSWER-identify a pneumonia on a chest radiograph for a ER physician. shape distortion can be a result of a patients body habitus ? - ANSWER-True In a vacuum , electromagnetic radiation - ANSWER-has a velocity equal to the speed of light A radiographer can best reduce the amount of scatter radiation from reaching the receptor by A. collimating B.beam restriction C.utilizing a grid - ANSWER-all of the above