Welcome to your Radiography Name: Email: [The electricity provided to the radiology department is:] 110 Hz or 220 Hz DC 60 Hz AC 60 Hz DC None . [An algorithm is:] A mathematical hypothesis used in imaging A mathematical formula used to reconstruct the image in digital imaging An advanced imaging procedure The mathematical basis for film-screen imaging None . [Structure d is the fig. ] Transverse colon Splenic flexure Hepatic flexure Descending colon None Comment . [Total brightness gain achieved using an image intensifier equals:] Flux gain times minification gain Diameter of input phosphor times diameter of output phosphor Intensification factor—brightness without an image intensifier divided by brightness with an image intensifier Total light emitted at the photocathode None . [Undesirable fluctuations in brightness are called:] MTF Image noise Quantization Scintillation None . [What is located in the x-ray circuit between the highvoltage transformer and the x-ray tube?] Step-down transformer Rectifier Cathode Timer None . [Dynamic range is defined as:] The range of exposures over which a detector can acquire image data Exposure latitude Window width Window level None . [The concept of the reasonably prudent person is interpreted as:] How a reasonable jury member would perform the act How a professional who has similar education, training, and experience would perform the act How a prudent attorney would interpret the act How a reasonable and prudent judge would rule on the act None . [As speed class decreases:] The likelihood of noise increases Noise is unaffected Patient exposure increases Sharpness decreases None . [Photoelectric interaction occurs at what level in the atom?] L-shel K-shell M-shel Outer shell None . [A mechanical respirator is called a:] Ventilator Nasogastric tube Chest tube Venous catheter None . [The abbreviation that means “heart attack” is:] hx HA CVA MI None . [The input phosphor of the image-intensifier tube converts:] Electron energy to x-ray energy X-rays and heat to visible light X-ray energy to visible light X-ray energy to an electronic image None . [If the exposure field is not accurately recognized, the histogram:] Narrows Widens Remains the same None . [Voltage coming to the x-ray machine is kept constant through the use of a(n):] Autotransformer Step-down transformer Rectifier Line voltage compensator None . [What allows more anatomic structures to be captured during an exposure?] Contrast resolution Spatial resolution Dynamic range MTF None . [What condition should not be imaged with use of an AEC?] Atelectasis Bronchogenic carcinoma COPD Emphysema None . [What is the transformer used to boost voltage to kilovoltage levels called?] Autotransformer Step-down transformer Step-up transformer Low-voltage transformer None . [The thicker part of anatomy should be placed under which aspect of the x-ray tube?] Central ray Cathode Anode Collimator None . [The highest incidence of contrast agent reactions occurs with the use of:] Negative contrast media Ionic iodinated contrast media Nonionic iodinated contrast media Barium sulfate None . [What plane passes transversely across the body?] Transverse plane Midcoronal plane Median sagittal plane Sagittal plane None . [Grid frequency is defined as:] The same as grid ratio The amount of lead in the grid (expressed in terms of focusing distance) How often a grid is used The amount of lead in the grid (expressed as the number of lead strips per inch) None . [The most commonly used gonadal shield is the:] Shadow shield Collimator Contact shield Filter None . [X-rays are produced as incident electrons collide with inner shell electrons in target atoms by a process called:] Characteristic Photoelectric Bremsstrahlung Compton None . [When the PA projection of the skull is performed to image the frontal bone: 1. The central ray is directed perpendicular to the IR 2. The OML is perpendicular to the IR 3. The central ray exits at the glabella 4. MSP is parallel to the cassette] All are true 1, 2 1, 3, 4 1, 3 None . [Structure G is the fig.] Talus Navicular Cuboid Second or intermediate cuneiform None Comment . [The structure designated as III is the Fig. ] Ulna Metacarpal Radius Humerus None Comment . [A step-down transformer:] Steps down voltage Steps down current Steps up voltage Steps up resistance None . [What device increases voltage approximately 500 times?] Anode mA meter Ionization chamber Step-up transformer None . [The equation H/D describes:] Grid radius Contrast Grid ratio Reciprocity law None . Time's up
