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. In what time period did mathematical theory and solid-state electronics come out?






2. 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.






3. What does DICOM stand for?






4. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.






5. Digital detectors are capable of producing ______ shades of gray.






6. The ____ is the heart of the computer while the ___ is the vessels.






7. Noise is ____ related to contrast.






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






9. What is an image that has been converted into numerical values for transmission or processing?






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






11. Which type of information consists of operating instructions?






12. What changes the pixel value by addition or subtraction and controls image density?






13. 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?






14. What is the information stored as magnetic variations referred to as?






15. The human visual range is ___ or fewer shades of gray.






16. Binary systems operate with a ___-symbol language.






17. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?






18. What provides specific instructions for calculations and sequential steps to be followed?






19. Changes in window width are sometimes called gray scale ____ or ____.






20. What is the name for an 8-bit word?






21. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.






22. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






23. 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?






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






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






26. Medical imaging is often achieved from information that has been processed by what?






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






28. What does a 1 in binary code stand for?






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






30. Resolution is controlled by what?






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






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






33. 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.






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






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






36. What is high-pass filtering also called?






37. What are the 3 classifications of digitized image filters?






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






39. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.






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






41. A larger matrix provides ____ pixels.






42. Fluoroscopic noise mostly comes from what?






43. What provides specific instructions for calculations and sequential steps to be followed?






44. Computer programs are called what?






45. 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?






46. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






47. What is the 'heart' of every computer?






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






49. What determines resolution?






50. The ____ is the heart of the computer while the ___ is the vessels.