Boards X-Rays Final Exam Practice Questions with complete solutions

According to National Council on Radiation Protection and Measurement (NCRP) guidelines, a medical xray tube must include aluminum equivalent filtration equal to a minimum of: - 2.5 mm Which two guidelines are accepted means of controlling infection in the imaging department? 1. Never transport an isolation patient into the radiology department 2. Wash hands before and after every patient 3. Wear gloves when emptying soiled linen 4. Recap dirty needles 5. Wear head covering when working with any patient in isolation - 2. Wash hands before and after every patient 3. Wear gloves when emptying soiled linen Which radiation measurement is most helpful when comparing biologic damage from different radiation types? - Equivalent dose While caring for a patient with chest tube drainage, which of the following actions should you take? 1. Clamp the drainage tube during the procedure 2. Keep the drainage tube below the level of the chest during the procedure 3. Remove the suction device during the procedure 4. Make sure a nurse accompanies the patient for the procedure - 2. Keep the drainage tube below the level of the chest during the procedure The International System of Units (SI) for absorbed dose is: - Gray (Gy) If a radiologist instructs you to inject a patient with radiographic contrast medium and the patient collapses from anaphylactic shock, you may be protected from litigation under the doctrine of: - Respondeat superior Feedback: Respondeat superior is Latin for "the master speaks for the servant" and refers to belief that the physician and/or healthcare facility is responsible for the negligent acts of employees. Pathogenic microorganisms that require a living host's cells to survive and reproduce is called: - Viruses How is the greater tubercle visualized on a lateral image of the humerus? - The greater tubercle is superimposed over the humeral head An underexposed image might produce an image artifact called: (Select two) 1. Noise 2. Quantum mottle 3. Saturation 4. Ghosting - 1. Noise 2. Quantum mottle In a direct capture digital radiography (DR) system, a decreased detector element (DEL) size results in: - Increased spatial resolution An exposure is made using 25 milliamperes (mA) and an exposure time of 3/8 seconds. What is the total milliampere-seconds (mAs)? - 9 mAs 25 mA x 3/8 seconds Inherent filtration refers to filtration that is: - Part of the x-ray tube design Feedback: Anything that is part of tube construction that x-ray photons will pass through and be absorbed by if they have low enough energy is considered inherent filtration. A cumulative timer must be provided and used with each fluoroscopic unit. This resettable device times the x-ray beam-on time and sounds an audible alarm or temporarily interrupts the exposure after the fluoroscope has been activated for: - 5 minutes In an image intensifier, electronic intensification occurs when electrons are moved at high speed from the: - Photocathode to the output phosphor Feedback: The input phosphor converts x-ray photons to light photons. The photocathode converts the light photons into electrons, which are moved at high speed to the output phosphor, where they are converted back to light. The output phosphor is thousands of times brighter than the input phosphor because of its smaller size and the additional energy given to the electrons when they are accelerated through the image intensifier. Which three of the following conditio