XRAY EXAM 2023/2024 COMPLETE 100% VERIFIED QUESTIONS AND ANSWERS | RATED A+

XRAY EXAM 2023/2024 COMPLETE 100% VERIFIED QUESTIONS AND ANSWERS | RATED A+ Which of the following occur minutes to hours after exposure to ionizing radiation? 1.) functional damage & morphological changes 2.) Appearance of atypical cells 3.) Cataract formation - Answer1 & 2 If the operator stands behind a portable shield, which may allow scattered radiation to pass around it's edges; total radiation dose reduction would be approximately: a.) 50% b.) 75% c.) 92% d.) 99% - Answer99% Which of the following are SHORT TERM stepwise effects of radiation exposure? 1.) life-span shortening 2.) primary radiochemical reactions 3.) functional damage of cells A.) 1 and 2 b.) 1 and 3 c.) 2 and 3 d.) 1, 2, and 3 - AnswerC. 2 and 3 Limited permit X-ray technicians are excluded from: A.) taking plain radiographs of the extremities B.) operating portable or mobile X-ray equipment C.) taking plain radiographs of the chest d.) all of the above - AnswerB.) operating portable or mobile X-ray equipment An example of a radiographic study using natural shielding to decrease radiation to the ovaries is: A.) AP T/S b.) AP pelvis c.) lateral femur d.) PA lumbar spine - Answerd.) PA Lumbar Spine Which of the following is part of the x-ray tube anode? 1.) positive electrode 2.) negative electrode 3.) target - Answer1 and 3. Which electron interaction with the anode causes x-ray beam to be polygenergetic? A.) characteristic b.) Compton c.) pair production d.) Bremsstrahlung - Answerd.) Bremsstrahlung What happens to the nominal focal spot size as the x-ray tube target (anode) decreases? A.) decreases B.) stays the same c.) increases d.) inverts - Answera.) decreases Which of the following will reduce patient radiation dose? a.) increased thickness of the alum. tabletop b.) use more radio-absorbent cassette fronts c.) use KEVLAR cassette fronts d.) increase grid ratio - Answer?? Look up see page? What accounts for most of the repeated radiographs (retakes/repeats) today? a.) incorrect film storage b.) incorrect selection of PRIMARY FACTORS c.) lack of collimation d.) incorrect film processing - Answerb.) incorrect selection of PRIMARY FACTORS 0.5 mm lead equivalent gonad shields placed over the ovaries/testes reduce radiation dose to the gonads approximately ______% a.) 55% b.) 80% c.) 92% d.) 100% - Answerc.) 92% (verify) Under which of the following conditions much gonads be shielded? 1.) the patient is of reproductive age 2.) the shield will not interfere with the diagnosis 3.) the gonads lie within 5 cm of the primary beam - AnswerAll of the Above verify 5 cm.. To reduce the radiation dose to patients, it is necessary to formulate your radiographic technique chart so that the kVP is __________ and the mAs is ____________. a.) high, high b.) low, low c.) high, low d.) low, high - AnswerC.) high kVp, low mAs Approximately, what % of cases will require minor adjustments to a radiographic technique chart? A.) 5 B.) 10-25 c.) 25-50 D.) 75 - AnswerB. 10-25 How should exposure factors be adjusted for a patient with emphysema? a.) keep kVP the same, double mAs b.) keep kVP the same, halve the mAs c.) increase kVp, keep same mAs d.) no change is necessary - Answerb.) keep kVP the same, halve the mAs