kettering practice questions with correct answers|100% verified|58 pages

kettering practice questions with correct answers With increasing levels of beam filtration where will the greatest dose savings be realized? A. in the initial layers of tissue struck by the beam B. in tissues at the midline C. in tissues at the exit surface of the patient D. at the level of the patient's gonads Answer A. in the initial layers of tissue struck by the beam Which of the following barium/air filled anatomic structures is best demonstrated in the LAO position? A. ileocecal valve B. sigmoid colon C. splenic flexure D. hepatic flexure Answer C. splenic flexure Elongation or foreshortening of the image of an object on the radiographic image is a result of: A. improper grid alignment B. the grid stopping at some point during the exposure C. the image stopping temporally during transport through the image processor D. improper alignment of the tube, part or image on the exam in question Answer D. improper alignment of the tube, part or image on the exam in question The bucky slot cover of a fluoroscopic unit must provide a minimum lead equivalent absorption equal to ___mm of lead. A. 0.50 B. 0.35 C. 0.25 D. 1.0 Answer C. 0.25 What should be the technologist's first response upon discovering a fire has broken out in a patient holding area? A. try to put the fire out B. evacuate any patients from the area C. close all doors leading into the area D. call "Code RED" Answer B. evacuate any patients from the area The central ray is directed to a point 2" distal to the ___ when performing an AP projection of the scapula. A. coracoid process B. acromioclavicular joint C. coranoid process D. scapular notch Answer A. coracoid process A decrease in beam filtration will have what effect on radiographic image contrast? A. radiographic image contrast will decrease B. radiographic image contrast will remain constant C. radiographic image contrast will increase D. radiographic image contrast will vary directly with changes in beam filtration Answer C. radiographic image contrast will increase The best spatial resolution will be seen with which of the following image matrix sizes? A. 128 x 128 B. 512 x 512 C. 1,089 x 1,089 D. 2,048 x 2,048 Answer D. 2,048 x 2,048 A threshold dose-response relationship is seen in which of the following types of radiation-induced cancers? A. bone B. breast C. lung D. skin Answer D. skin Why is limiting the maximum kilovoltage of the useful X-ray beam important when performing exams employing an iodinated contrast media? A. excessive kilovoltage reduces the ability of the iodinated contrast media to attenuate the useful X-ray beam B. excessive kilovoltage reduces the percentage of the useful X-ray beam that is successful in penetrating through the contrast media C. the primary reason is to reduce patient exposure D. so as to not overload the radiographic tube Answer A. excessive kilovoltage reduces the ability of the iodinated contrast media to attenuate the useful X-ray beam Antiversion of the femoral neck is overcome by a ____ when performing an AP projection. A. 12 degree external rotation of the toes B. 20 degree external rotation of the toes C. 15 degree internal rotation of the toes D. 20 degree internal rotation of the toes Answer C. 15 degree internal rotation of the toes The following factors below will yield a beam intensity of 1200 photons/unit area at a source to image receiver distance of 80": 70 kVp, 150 mA, 1/5 seconds, 2.0 mm focal spot. What will be the resultant beam intensity if the same factors were to be used at a 20" source to image receiver distance? A. 20400 photons/unit area B. 300 photons/unit area C. 4800 photons/unit area D. 19200 photons/unit area Answer D. 19200 photons/unit area In the Compton interaction with matter the photon energy is ______________ the binding energy of the electron in the orbital shell. A. less than B. greater than C. equal to D. there is no relationship between the two Answer B. greater than What is the term associated with an object that once contaminated acts as the vehicle for an infection? A. pathogen B. vector C. fomite D. reagent Answer C. fomite On a lateral image of a patient's chest measuring 18 cm, the radiologist notes the center of a 1.5 mm mass located 5.0 cm posterior to the midline of the chest. You are instructed to produce linear tomograms of this mass with the patient in a supine position. What fulcrum setting below will be successful in demonstrating this mass?