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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 is critical to how fast the computer system can function?
analog-to-digital converters
byte
bus speed
bus
2. Modalities differ in bit depth that is available depending on the capabilities of what?
32
IR
CT and MRI
contrast
3. Which memory replaces new information with the old; can change?
matrix
central processing unit
programs and data
write memory
4. The human visual range is ___ or fewer shades of gray.
numerical value
0 - 1
scanning or array detection
32
5. What does DICOM stand for?
data
digital imaging and communication in medicine
bus speed
monitors and printers
6. In what time period did mathematical theory and solid-state electronics come out?
1940s
pixel size
1-2 lp/mm
low-pass - band-pass - and high-pass
7. The quality of the data acquired from the IR is measured by what three data characteristics?
scanning or array detection
progressive scanning
little
frequency - contrast - and noise
8. Computer memory is often rated in terms of total ____ memory.
IR
abacus
DICOM standard
byte
9. What is the name for an 8-bit word?
200 - 500-1000
smoothing
matrix
byte
10. Each pixel is capable of representing a wide range of what?
CPU - Bus
bandwidth
RAM - ROM
shades of gray
11. Which type of information consists of operating instructions?
program
CT and MRI
central processing unit
transverse - sagittal - and coronal
12. Which memory can only be extracted without alteration; cannot change?
read memory
frequency - contrast - and noise
2^x
health level 7
13. A larger matrix provides ____ pixels.
electronic sources
hardware
smoothing
smaller
14. What is the name for a binary digit?
high
pixel
1945
bit
15. Computerized digital images are described in terms of what
signal-to-noise ratio
inverse
number of values displayed per image side
analog computers
16. A __ _____ disk will store over 10000000 bytes of information.
little
10 megabyte
scanning or array detection
inversely
17. When detectors acquire their information through ____ they are receiving all the info at once.
number of values displayed per image side
array detection
high
Fourier Transformation
18. What is critical to how fast the computer system can function?
progressive scanning
bus speed
0 - 1
voxel
19. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
byte
voxel
slow scanning
decrease
20. What is the random background information that does not contribute to the image quality?
ROM
noise
analog computers
pixel size
21. Digitalization of analog information (increases / reduces) the quality and quantity of information?
numerical value
reduces
write memory
band-pass filtering
22. What does a 1 in binary code stand for?
CPU - Bus
window
on
progressive scanning
23. What is the 'noisiest' component of a digital system?
200 - 500-1000
TV camera
progressive scanning
frequency
24. What is an image that has been converted into numerical values for transmission or processing?
1945
digital image
voltage
smaller
25. All medical imaging is achieved with which type of computers?
direct
digital computers
RAM - ROM
on
26. Changes in window width are sometimes called gray scale ____ or ____.
scanning
bus speed
expansion or compression
analog computers
27. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
band-pass filtering
filtering
programs and data
fine
28. What is the name for a binary digit?
low-pass - band-pass - and high-pass
low
bit
electronic sources
29. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
1945
1-2 lp/mm
digital computers
bit
30. What is the name for an 8-bit word?
central processing unit
CD or DVD
CPU - Bus
byte
31. What does a 0 in binary code stand for?
increase
progressive scanning
gray scale bit depth
off
32. What input device do radiographers use on a normal basis?
signal-to-noise ratio
1-2 lp/mm
IRs
high
33. 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?
binary machine
binary machine
computer - radiographer
DICOM standard
34. What is the equation for determining gray scale bit depth?
2^x
smaller
IRs
decrease
35. What permit input/output of information to or from the CPU?
scanning or array detection
peripherals
data
central processing unit
36. What determines resolution?
pixel size
filtering
1940s
software
37. A low contrast image has a ___ frequency.
frequency - contrast - and noise
low
memory
32
38. Computer programs are called what?
software
1945
large amount
low-pass - band-pass - and high-pass
39. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
DICOM standard
RAM
CPU - Bus
matrix
40. 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.
low-pass - band-pass - and high-pass
noise
0 - 1
slow scanning
41. Noise is ____ related to contrast.
inversely
digital imaging and communication in medicine
analog-to-digital converters
binary machine
42. What was the earliest computer device called?
software
software
IR
abacus
43. What type of scanning increases resolution slightly by scanning all 525 lines in order?
ROM
progressive scanning
array detection
window
44. A high contrast image has a ___ frequency.
health level 7
high
IRs
pixel size
45. Computer equipment is called what?
hardware
computer - radiographer
magnetic tape
health level 7
46. What is the 'heart' of every computer?
expansion or compression
inversely
central processing unit
voltage
47. In what time period did mathematical theory and solid-state electronics come out?
CD or DVD
scanning or array detection
1940s
mathematical theory - solid-state electronics - and microchip technology
48. Fluoroscopic noise mostly comes from what?
detector
read memory
electronic sources
numerical value
49. What is the name of the 'modern electronic computer'?
two
ENIAC
array detection
direct
50. What are devices that process information?
abacus
computers
digital image
IR