Welcome to your Radiography Name: Email: [Structure D is the fig. ] Medial condyle Lateral epicondyle Lateral condyle Tibial plateau None Comment . [At what speed do x-rays travel?] The speed of light—186,000 miles per hour The speed of the incident electrons—93,000 miles per second The speed of light—186,000 miles per second Infinite speed None . [The primary type of grid used in diagnostic imaging is:] Crosshatch Parallel Rhombic Focused None . [Filters made of aluminum and copper are placed in the film badge to measure x-ray:] Quantity Source Energy Type None . [A radiographic grid should be used when: 1. The body area to be radiographed measures more than 10 cm 2. A field size larger than 10 to 12 inches is used 3. More than 60 kVp is required to penetrate a body part] 1 and 2 only 1 and 3 only 2 and 3 only 1, 2, and 3 None . [When radiation strikes the cytoplasm, which of the following occurs?] Direct effect Law of Bergonie and Tribondeau Target theory Indirect effect None . [What is the site of most nosocomial (health careacquired) infections?] Urinary catheter Chest tube NG tube Venous catheter None . [How is workload factor measured?] Half-value layer Amount of time the beam is on mA minutes per week Average kVp per week None . [The primary purpose of filtering the x-ray beam is to:] Increase contrast Improve radiation protection Soften the beam for proper imaging Remove short-wavelength rays None . [The best survey study of the paranasal sinuses is obtained by use of what projection?] Lateral Parietoacanthial (Waters) Upright lateral SMV None . [Calculating heat units for three-phase, 12-pulse equipment requires the use of _____ as a constant; calculating heat units for single-phase equipment requires the use of _____ as a constant; calculating heat units for three-phase, 6-pulse equipment requires the use of _____ as a constant.] 1.0, 1.35, 1.41 1.35, 1.0, 1.41 Calculating heat units does not require the use of a constant because all x-rays possess the same ionizing potential 1.41, 1.0, 1.35 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 . [Distortion that occurs when the x-ray beam is angled along the long axis of a part is:] Elongation Magnification Minification Misrepresentation None . [Which of the following photon–tissue interactions does not occur in diagnostic radiography?] Photoelectric interaction Compton interaction Coherent scatter Pair production None . [Which of the following is true concerning holding of patients for radiographic exams?] May be performed routinely to obtain a diagnostic exam Should be done only when absolutely necessary, and then the holding should be done by a competent radiographer so that a repeat will not be needed Should be done only when absolutely necessary, and then the holding should be done by a nonpregnant member of the patient’s family May be performed using a student radiographer to hold because students are not exposed as often as staff radiographers None . [The suffix that means “disease” is:] -osis -pathy -rhaphy -scopy None . [Structure K is the fig. ] Fifth metatarsophalangeal joint Navicular Cuboid Second or intermediate cuneiform None Comment . [Bit depth is equal to:] 2n (n equals the number of bits) 4096 shades of gray Pixel pitch Bits times bytes None . [The amount of material needed to reduce the intensity of the beam by 1/10 is called:] Half-value layer Tenth-value layer Total filtration Inherent filtration None . [If the dose of scatter radiation in fluoroscopy to the radiographer is 10 mGya at a distance of 2 feet from the table, where should the radiographer stand to reduce the dose to 2.5 mGya?] 8 feet from the table 4 feet from the table At the foot of the table Directly behind the fluoroscopist None . [Which of the following is a symptom of shock?] Accelerated pulse; extremely warm skin Accelerated pulse; cool, clammy, pale skin Systolic pressure less than 50 mm Hg Accelerated pulse; cool, clammy, pale skin; systolic blood pressure less than 30 mm Hg None . [Which of the following may be considered as an example of battery?] Violating HIPAA Radiographing the wrong patient or body part Verbally abusing a patient Criticizing a physician’s order in front of a patient None . [Full-wave rectification uses:] A single semiconductor Four silicone-based semiconductors The x-ray tube as a semiconductor Four silicon-based semiconductors None . [The two types of electromagnetic induction are:] Autoinduction and mutual induction Self-induction and mutual induction Generated induction and self-induction Current induction and voltage induction None . [The lateral transthoracic humerus, oblique sternum,and lateral thoracic spine may be imaged best by using:] Short exposure time Breathing technique Image intensifier CT None . [For a direct PA projection of the skull, the central ray is directed:] 15 degrees caudad 25 degrees caudad Perpendicular to the image receptor Perpendicular to the image receptor, exiting the nasion when the OML is perpendicular to the IR None . [Choose all that are true concerning grids (choose 3):] Contrast improvement factor is the measure of the ability of a grid to enhance contrast Grid selectivity is the ratio of primary radiation transmitted through the grid to secondary radiation transmitted through the grid Grids are used when part thickness is less than 10 cm GCF is the amount of increase in kVp necessary when converting from nongrid to grid technique The primary purpose of grids is radiation protection The main function of grids is to prevent Compton scatter from reaching the IR Grids prevent the production of scatter None . [Which of the following is the basis for all radiation protection standards?] Nonlinear-nonthreshold effect Linear-nonthreshold effect Linear-threshold effect Nonlinear-threshold effect None . [Pixel is an acronym meaning:] Detector element Picture element Volume element Bit element None . [Bradycardia indicates a pulse of:] Greater than 100 beats per minute Greater than 60 beats per minute Greater than 90 beats per minute Less than 60 beats per minute None . Time's up
