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Test your basic knowledge |
Digital Image Processing
Start Test
Study First
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?
central processing unit
scanning or array detection
inverse
array detection
2. All medical imaging is achieved with which type of computers?
inversely
program
computers
digital computers
3. A __ _____ disk will store over 10000000 bytes of information.
voxel
fine
peripherals
10 megabyte
4. What is the mathematical algorithm used to create all medical images?
analog-to-digital converters
Fourier Transformation
read memory
CT and MRI
5. Resolution is controlled by what?
1940s
programs and data
matrix size
decrease
6. What is the measure of the differences between the data values referred to as?
RAM - ROM
band-pass filtering
contrast
matrix
7. Modalities differ in bit depth that is available depending on the capabilities of what?
voxel
RAM - ROM
Input devices
IR
8. The _____ the matrix size - the better the resolution.
greater
Input devices
low-pass - band-pass - and high-pass
program
9. Computer programs are called what?
0 - 1
edge enhancement filtering or sharpening
two
software
10. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
parallel - serial
1-2 lp/mm
numerical values
1945
11. What is the raw data to which a Fourier Transformation is applied to create the digital image?
TV camera
frequency
1000+
smoothing
12. When detectors acquire their information through ____ they are receiving all the info at once.
array detection
CD or DVD
direct
10 megabyte
13. What is the equation for determining gray scale bit depth?
2^x
smoothing
numerical value
accentuates or suppresses
14. What is the primary limitation with the resolution on digital images?
raster scan pattern
central processing unit
voltage
analog-to-digital converters
15. What provides specific instructions for calculations and sequential steps to be followed?
TV camera
1970s-1990s
software
greater
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?
read memory
raster scan pattern
health level 7
1-2 lp/mm
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?
transverse - sagittal - and coronal
bus
software
CT and MRI
18. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
Input devices
binary machine
program
decreased
19. A larger matrix provides ____ pixels.
smaller
gray scale bit depth
digital computers
band-pass filtering
20. What are the 3 classifications of digitized image filters?
low-pass - band-pass - and high-pass
abacus
magnetic tape
number of values displayed per image side
21. What type of scanning increases resolution but can't be used in real-time dynamic studies?
slow scanning
signal-to-noise ratio
reduces
fine
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?
increase
central processing unit
bus
1940s
23. What does a 0 in binary code stand for?
transverse - sagittal - and coronal
peripherals
off
1960s
24. What changes the pixel value by addition or subtraction and controls image density?
1970s-1990s
peripherals
window level
computer - radiographer
25. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
magnetic tape
direct
1940s
fine
26. The human visual range is ___ or fewer shades of gray.
32
1960s
decrease
CPU - Bus
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?
10 megabyte
DICOM standard
increase
0 - 1
28. A low contrast image has a ___ frequency.
array processors
analog computers
low
mathematical theory - solid-state electronics - and microchip technology
29. What type of scanning increases resolution slightly by scanning all 525 lines in order?
CD or DVD
progressive scanning
noise
number of values displayed per image side
30. What input device do radiographers use on a normal basis?
window width
byte
IRs
2^x
31. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
filtering
Fourier Transformation
read memory
byte
32. Modalities differ in bit depth that is available depending on the capabilities of what?
scanning
reduces
CT and MRI
IR
33. Which type of information consists of operating instructions?
2^x
memory
program
2^x
34. What does DICOM stand for?
analog computers
bus speed
digital imaging and communication in medicine
voltage
35. What is a square series of boxes that gives form to the image?
numerical values
inversely
matrix
health level 7
36. Computer equipment is called what?
2^x
1-2 lp/mm
hardware
analog computers
37. Each pixel is capable of representing a wide range of what?
shades of gray
magnetic tape
band-pass filtering
high-pass filtering
38. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
voxel
0 - 1
increase
pixel
39. Which type of information consists of operating instructions?
analog computers
low
program
detector
40. What is the information stored as magnetic variations referred to as?
memory
raster scan pattern
abacus
Input devices
41. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
analog computers
software
1-2 lp/mm
ENIAC
42. What is the name for a binary digit?
hardware
bus
computer - radiographer
bit
43. Noise is measured as what?
matrix
1945
signal-to-noise ratio
digital imaging and communication in medicine
44. Computer equipment is called what?
noise
hardware
expansion or compression
decreased
45. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
numerical values
electronic sources
transverse - sagittal - and coronal
write memory
46. Which computers handle data composed of definite quantities of current?
digital computers
array detection
1-2 lp/mm
hardware
47. What provides specific instructions for calculations and sequential steps to be followed?
software
noise
low-pass filter
pixel
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.
ROM
window
IR
low-pass filter
49. What directs information to and from various parts of the computer?
bus speed
200 - 500-1000
pixel size
central processing unit
50. What is critical to how fast the computer system can function?
bus speed
pixel size
TV camera
voltage