RADT_153_Unit_3_Exam

RADT_153_Unit_3_Exam - RADT 153 Image Analysis Unit 3 The...

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Unformatted text preview: RADT 153 Image Analysis Unit 3 The Perceptual Properties of Image Quality Unit Exam 2 3.0 The Perceptual Properties of Image Quality Directions: 1. Write your name and the date on your Scantron form. Identify the subject as the course number (for example, RADT 153) along with the test number (for example, Unit 4). 2. For each of the questions below, select the best answer to the question. 3. Using a No. 2 pencil, fill in the appropriate answer on the answer sheet. 4. Erase unwanted answers completely. Questions with two or more filled in answer spaces are graded as incorrect. 5. Answer all questions. 6. You have a maximum 15 minutes to complete the following 25 questions. (Note: This time factor approximates the amount of time you would be allowed to answer the same number of questions on the Registry examination in radiography). 1. Unwanted radiographic densities on a radiograph that tend to obstruct viewing of the structural details of the radiographic image. A. B. C. D. E. 2. Artifacts Smudge Crown Tree Noise Anything that was NOT intentionally meant to be imaged on the radiograph other than the anatomy of the patient. A. B. C. D. E. Artifacts Fogging Objects Mottle None of the above 3 3. This results from any type of exposure energy that is capable of ionizing unexposed silver bromide crystals in the x-ray emulsion. A. B. C. D. E. 4. Static artifact. A. B. C. D. E. 5. E. Electrically ground x-ray cassettes Shock someone before touching the x-ray cassettes Electrically ground x-ray film loading benches Don’t electrically ground the x-ray film loading benches Touch glass before touching the x-ray cassettes Examples of electromagnetic fogging. A. B. C. D. E. 7. Tree Crown Smudge All of the above None of the above One of the following will prevent static artifacts. A. B. C. D. 6. Sensitized Artifacts Nonesensitized Artifacts Physical Artifacts All of the above None of the above Light, Radiation Light, Smudge Radiation, Smudge Radiation, Static Smudge, Static What occurs when the exposed x-ray film is processed under inappropriate time, temperature, or specific activity of developer or fixer chemistry solutions. A. B. C. D. E. Natural fogging Chemical fogging Atmospheric fogging Physical fogging Sensitized fogging 4 8. The type of artifacts that occur t from physical damage of the xray film emulsion? A. B. C. D. E. 9. An object in, on, or around the patient that have also been made part of the finished radiographic image. A. B. C. D. E. 10. Bullet fragments Glass chips Metal sutures Radionuclide implants False teeth NOT an example of objects ON a patient A. B. C. D. E. 12. Chemical artifacts Natural artifacts Physical artifacts Sensitized artifacts Nonsensitized artifacts NOT an example of objects WITHIN patient. A. B. C. D. E. 11. Physical Chemical Natural Sensitized Nonsensitized Buttons Contrast media Jewelry Hair pins Rubber bands NOT an example of objects AROUND a patient? A. B. C. D. E. Metal traction devices Catheters High powered magnets Monitoring wires Intubation tubing 5 13. The density variation in a radiograph cause by intensifying screens. A. B. C. D. E. 14. The variation in density of a uniformly exposed radiograph that results from the random spatial distribution of x-ray quanta absorbed in the screen. A. B. C. D. E. 15. Light diffusion Screen absorption Film contrast Film speed All of the above What is attributed to the__________ in the phosphor layer, such as clumping of the phosphor crystals, or coating variations? A. B. C. D. E. 17. Mottle Quantum Mottle Statistics Fog Noise This affects quantum mottle. A. B. C. D. E. 16. Exposure Artifact Safelight Fogging Mottle Fluorescence Lag (Phosphorescence) Mottle Artifacts Uniformity Nonuniformity None of the above The combined effect of structure mottle and quantum mottle is sometimes referred as ________________________. A. B. C. D. E. A A A A A dirty screen dirty film screen mottle poorly constructed intensifying screen film mottle 6 18. The visual impression of the density variation in a film uniformly exposed to light is called? A. B. C. D. E. 19. NOT the optimal condition for the view box illuminator. A. B. C. D. E. 20. free of dust and dirt uniform fluorescent white light intensity Avoid false perception of contrast Avoid false perception of density None of the above Sharp image viewing conditions. A. B. C. D. E. 21. Film Graininess Screen Graininess Mottle Fogging Artifacts A dot not less than one one-hundredths of an inch in diameter and the viewing distance is ten inches. A dot not less than one tenth of an inch in diameter and the viewing distance is twenty inches. A dot not less than one one-thousandth of an inch in diameter and the viewing distance is twenty inches. Not less than one one-hundredths of an inch in diameter and the viewing distance is fifteen inches. Not less than one tenth of an inch in diameter and the viewing distance is ten inches. The position the patient should be in, assuming the radiographer has correctly marked the right and left side of the body? A. B. C. D. E. Supine PA Anatomic Decubitus Trendelenburg 7 22. An example of radiographs organized in a proper format to make viewing less complicated. A. B. C. D. E. 23. NOT a primary variable to consider when a radiograph is overexposed. A. B. C. D. E. 24. mA Time kV mAs FFD NOT the cause of unexpected shape distortion. A. B. C. D. E. 25. Make it so the radiologist has to turn their head to look at the film. There should be no markers indicating what the right or left side is. The radiograph should be placed in opposite origins. The radiograph should be placed in the same origins. None of the above Alignment of x-ray tube Alignment of bucky tray Alignment of patient Alignment of image receptor Exposure timer malfunction NOT a justified reason to repeat a radiograph. A. B. C. D. E. Excessively blurred image details due to patient motion, excessive size distortion. Failure of the x-ray machine to deliver the desired quantity and quality of radiation to the film due to equipment failure. Failure of the radiographer to place the tube directly over the part to be radiographed in a locked position. Failure of the processor to adequately develop and fix the radiographic image based on optimal time, temperature, and specific activity of development. Failure of the radiographer to collimate adequately or use lead protection. ...
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