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. What are the two ways detectors acquire information?






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






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






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






5. Resolution is controlled by what?






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






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






8. The _____ the matrix size - the better the resolution.






9. Computer programs are called what?






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






11. What is the raw data to which a Fourier Transformation is applied to create the digital image?






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






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






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






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






16. 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?






17. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






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






19. A larger matrix provides ____ pixels.






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






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






22. 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?






23. What does a 0 in binary code stand for?






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






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






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






27. 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?






28. A low contrast image has a ___ frequency.






29. What type of scanning increases resolution slightly by scanning all 525 lines in order?






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






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






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






33. Which type of information consists of operating instructions?






34. What does DICOM stand for?






35. What is a square series of boxes that gives form to the image?






36. Computer equipment is called what?






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






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






39. Which type of information consists of operating instructions?






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






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






42. What is the name for a binary digit?






43. Noise is measured as what?






44. Computer equipment is called what?






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






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






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






48. Because the range of stored densities is so much wider than the visual range - any digital image is only a small part of the total data obtained - each image is a _____ on the total range of data.






49. What directs information to and from various parts of the computer?






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