Test your basic knowledge |

Digital Image Processing

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






2. The number of shades of gray is determined by what?






3. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






4. What is the measure of the differences between the data values referred to as?






5. Each pixel is capable of representing a wide range of what?






6. A high contrast image has a ___ frequency.






7. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






8. Fluoroscopic noise mostly comes from what?






9. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?






10. What are the two most common output devices?






11. When was ENIAC invented?






12. What type of scanning increases resolution but can't be used in real-time dynamic studies?






13. Who or What is responsible for density changes on a digital image? On a manual image






14. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?






15. What is the primary limitation with the resolution on digital images?






16. When subject contrast is high - the acquired data contrast will be ____.






17. Digitalization of analog information (increases / reduces) the quality and quantity of information?






18. What is the random background information that does not contribute to the image quality?






19. What is an individual matrix box or picture element?






20. A __ _____ disk will store over 10000000 bytes of information.






21. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.






22. What type of scanning increases resolution but can't be used in real-time dynamic studies?






23. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






24. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






25. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?






26. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






27. What is the equation for determining gray scale bit depth?






28. Noise is ____ related to contrast.






29. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






30. When detectors acquire their information through ____ they are receiving all the info at once.






31. The quality of the data acquired from the IR is measured by what three data characteristics?






32. Computer programs are called what?






33. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






34. Which memory replaces new information with the old; can change?






35. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.






36. What type of memory storage devices are required for large amounts of data?






37. What permit input/output of information to or from the CPU?






38. In what time period did microchip technology come out?






39. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.






40. What determines resolution?






41. Computer memory is often rated in terms of total ____ memory.






42. What is the mathematical algorithm used to create all medical images?






43. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?






44. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






45. Which type of information consists of collected facts?






46. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






47. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?






48. What is critical to how fast the computer system can function?






49. Noise is measured as what?






50. Increased noise = _____ image contrast.