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RADT465-Image Eval

ARRT Registry Review Covering Image Production and Evaluation

QuestionAnswer
What type of relationship do recorded detail and magnification have? Inverse relationship (Lange Prep Pg. 301)
What percentage of change in mAs is needed for there to be a perceptible change in density? 30% (Lange Prep Pg. 318)
Are pneumonia and ascites additive or destructive pathologic conditions? Additive (Lange Prep Pg. 333)
What type of kV is required to produce short-scale contrast? Low kv (high contrast) (Lange Prep Pg. 340)
What will the image result be if the center detector on AEC is used for a PA chest x-ray? The image will be overexposed (Lange Prep Pg. 350)
How much should the kV be changed in a variable technique chart when the part thickness increases by 1 cm? The kV should be increased by 2 for every 1 cm increase in part thickness (Lange Prep Pg. 352)
How are pixel size and resolution related? Inversely (Lange Prep Pg. 356)
What are used to obtain the pixel data from PSP imaging plates? Lasers (Lange Prep Pg. 359)
What materials are used to compose a thin-film transistor? Glass with amorphous selenium (Lange Prep Pg. 364)
What happens to noise when SNR decreases? Noise increases (Lange Prep Pg. 366)
Which system acquires, displays, and archives images? PACS (Lange Prep Pg. 366)
True or False. Using a small focal spot improved recorded detail. True (Lange Prep Pg. 308)
What are the two best methods to reduce voluntary motion? Good communication and suspended respiration (Lange Prep Pg. 310)
Are intensifying screens used in digital imaging or screen-film imaging? Screen-film imaging only (Lange Prep Pg. 321)
Which type of grid uses angled lead strips? Focused grid (Lange Prep Pg. 324)
Which type of grid error is characterized by density loss at the periphery of the image? Off-focus errors (Lange Prep Pg. 325)
What should be the humidity when storing film? 40-60% (Lange Prep Pg. 381)
What will happen to film if it is stored to close to x-ray rooms or radionuclides and is exposed to ionizing radiation? The film can be fogged (Lange Prep Pg. 381)
Chemical fog and guide show marks are what type of artifact? Processing (Lange Prep Pg. 383)
Which film processing step removes processing chemicals and permits archival quality? Wash (Lange Prep Pg. 386)
What temperature should the developer be maintained at? 92-95 degrees Fahrenheit (Lange Prep Pg. 387)
How long can a PSP layer store its latent image before fading occurs? 8 hours (Lange Prep Pg. 391)
True or False. Windowing does not affect the LUT. False (Lange Prep Pg. 396)
Which type of windowing changes the image brightness? Window level (Lange Prep Pg. 396)
How much underexposure and overexposure can CR/DR compensate for? 80% underexposure and 500% overexposure (Lange Prep Pg. 367)
What does APR stand for and what is the purpose? Anatomically programmed radiography - technologist selects anatomic part and projection, simultaneously selecting a processing algorithm (Lange Prep Pg. 408)
Are slow or fast screens used for extremities? Slow screens (Lange Prep Pg. 407)
What will occur if two linear grids are superimposed? Moiré effect (Lange Prep Pg. 413)
What kind of artifact will dust cause on a PSP during processing? Striking artifact (Lange Prep Pg. 424)
What is the function of contrast? Make details visible (Lange Prep Pg. 339)
Created by: marchuleta1