New Quiz 19 Dec Welcome to your Radiography Name: Email: [Beam restriction has the following effect on contrast:] Decreases contrast Longer scale of contrast Shorter scale of contrast No effect on contrast None . [The amount of radiation deposited per unit length of tissue traversed by incoming photons is called:] REM RADS LET RPU None . [Areas occupied by persons trained in radiation safety and wearing personnel monitoring devices are called:] Controlled areas Uncontrolled areas Off-limits areas Radiation areas None . [Which of the following produces scatter as a result of vibration of orbital electrons?] Photoelectric interaction Compton interaction Coherent scatter Pair production None Comment . [Which of the following describes the relationship between receptor exposure and the use of grids?] Grids always reduce receptor exposure Grids reduce receptor exposure unless mAs are increased to compensate Grids reduce receptor exposure by only absorbing scatter radiation Receptor exposure increases as grid ratio increases None . [An interaction that produces x-rays at the anode as a result of outer shell electrons filling holes in the K-shell is called:] Characteristic Photoelectric Compton Brems None . [The major advantage of nonionic contrast media over ionic contrast media is that nonionic contrast agents:] Are considerably less expensive Are less likely to cause an adverse reaction in the patient Provide better radiographic contrast Require the use of considerably less kV and mAs None . [Structure C is the fig] Body of sphenoid Occipital bone Dorsum sellae Anterior clinoid process None Comment . [Three-phase, 6-pulse full-wave rectification produces:] Direct current with 13% ripple Direct current with 4% ripple Direct current with 100% ripple Alternating current with 13% ripple None . [What condition involves the posterior portion of the tibia and the medial and lateral malleoli?] Trimalleolar fracture Giant cell myeloma Osteoarthritis Pott fracture None . [Which of the following bones has a dens?] Atlas Axis Thoracic vertebra Lumbar vertebra None . [In computed radiography, each pixel corresponds to a shade of gray representing an area in the patient known as a(n):] Pathology Density Voxel Artifact None . [The most effective method to prevent the spread of infection is:] Use of gloves Use of gowns Time, distance, and shielding Handwashing None . [Causing a patient to become apprehensive of being injured is called:] Assault Battery False imprisonment Invasion of privacy None . [This forms the medial part of the anterior chest wall:] Manubrium Floating Xiphoid Sternum None . [When a lateral projection of the knee is performed, the knee should be:] Extended 20 to 30 degrees Flexed to a 90-degree angle Flexed 20 to 30 degrees Fully extended None . [Cell damage may be exhibited as:] Loss of function or abnormal function Nothing Enhanced function None . [The radiographer must be proficient in the use of which of the following medical instruments?] Angiography catheter Sphygmomanometer Thermometer Oxygen administration equipment None . [The structure designated as I is the fig. ] Head of ulna Radial head Medial epicondyle Lateral epicondyle None Comment . [The unit of effective dose is the:] Becquerel Grayt Sievert Graya None . [Unjustified restraint of a patient defines:] Assault Battery False imprisonment Invasion of privacy None . [A transformer that has more turns in the secondary coil than in the primary coil is called a:] Step-up transformer Solenoid Step-down transformer Filament transformer None . [The accuracy of collimation at a 40-inch SID must be:] ± 4 inches ± 8⁄10 inch ± 1 inch ± 1⁄10 inch None . [The primary purpose of filtration is:] Radiation protection Removal of short-wavelength (soft) rays Hardening the beam for imaging Removal of long-wavelength (hard) rays None . [Any area that is touched by body fluids:] Must be washed completely Must be covered and isolated for the remainder of the day Must be evaluated by infection control Must be reported to risk management None . [The number of electrons boiled off the cathode andconsequently the number of x-rays produced are controlled by:] kVp SID mAs OID None . [Single-phase, full-wave rectification produces:] Direct current Pulsating direct current Pulsating direct current with 120 pulses per second Pulsating direct current with 120 pulses per second and 100% ripple None . [2n (where n equals the number of bits) defines:] Pixel density Shades of gray Bit depth Detector element size None . [When AEC is used, increasing the kVp:] increases the exposure time increases the image contrast decreases the exposure time has no effect on image quality None . [Grid radius is:] The total amount of lead in a grid The range of SIDs that may be used with a focused grid The objective plane H/D None . Time's up
