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. Window width and contrast have an ____ relationship.






2. Modalities differ in bit depth that is available depending on the capabilities of what?






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






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






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






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






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






8. What does DICOM stand for?






9. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






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






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






12. A high S/N indicates ___ noise in the image.






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






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






15. Resolution is controlled by what?






16. Computerized digital images are described in terms of what






17. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.






18. Fluoroscopic noise mostly comes from what?






19. What input device do radiographers use on a normal basis?






20. What are the two ways detectors acquire information?






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






22. What are the two ways detectors acquire information?






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






24. Computer programs are called what?






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






26. Which computers handle data composed of continuously varying electrical currents?






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






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






29. When was ENIAC invented?






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






31. 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?






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






33. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.






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






35. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






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






37. What determines resolution?






38. What are the two types of information computers use?






39. What determines resolution?






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






41. What can memory be transferred as?






42. Which computers handle data composed of definite quantities of current?






43. All medical imaging is achieved with which type of computers?






44. Which computers handle data composed of definite quantities of current?






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






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






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






48. What is the name of the 'modern electronic computer'?






49. 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.






50. What is required for collection of input information?