SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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 an individual matrix box or picture element?
pixel
shades of gray
1000+
RAM - ROM
2. What type of scanning increases resolution but can't be used in real-time dynamic studies?
slow scanning
central processing unit
bus speed
byte
3. A larger matrix provides ____ pixels.
IRs
smaller
gray scale bit depth
window level
4. 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.
IR
high-pass filtering
accentuates or suppresses
1945
5. Modalities differ in bit depth that is available depending on the capabilities of what?
filtering
reduces
IR
high-pass filtering
6. What are the two types of information computers use?
1945
high-pass filtering
programs and data
computers
7. What is an image that has been converted into numerical values for transmission or processing?
window width
digital image
CD or DVD
ENIAC
8. What does DICOM stand for?
CT and MRI
bit
digital imaging and communication in medicine
memory
9. A high contrast image has a ___ frequency.
2^x
abacus
frequency - contrast - and noise
high
10. A larger matrix provides ____ pixels.
band-pass filtering
10 megabyte
smaller
bus
11. There is a ___ relationship between subject contrast and acquired data contrast.
high
0 - 1
1970s-1990s
direct
12. Which memory replaces new information with the old; can change?
software
1940s
write memory
central processing unit
13. What type of scanning increases resolution slightly by scanning all 525 lines in order?
electronic sources
shades of gray
progressive scanning
high-pass filtering
14. What is the equation for determining gray scale bit depth?
2^x
inverse
peripherals
greater
15. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
matrix
smoothing
computer - radiographer
bus
16. What is the name for an 8-bit word?
abacus
bit
1970s-1990s
byte
17. What type of scanning increases resolution slightly by scanning all 525 lines in order?
frequency
progressive scanning
filtering
10 megabyte
18. What are devices that process information?
peripherals
computers
contrast
binary machine
19. What is the name of the 'modern electronic computer'?
ENIAC
bit
1970s-1990s
pixel
20. What provides specific instructions for calculations and sequential steps to be followed?
software
decreased
peripherals
TV camera
21. Medical imaging is often achieved from information that has been processed by what?
analog-to-digital converters
write memory
200 - 500-1000
slow scanning
22. What input device do radiographers use on a normal basis?
smoothing
greater
IRs
digital image
23. Changes in window width are sometimes called gray scale ____ or ____.
array detection
numerical value
matrix
expansion or compression
24. The computer either ____ or ____ selected frequencies during the filtering process.
Fourier Transformation
accentuates or suppresses
numerical value
1-2 lp/mm
25. Digitalization of analog information (increases / reduces) the quality and quantity of information?
abacus
reduces
direct
little
26. Computer memory is often rated in terms of total ____ memory.
greater
digital imaging and communication in medicine
byte
window
27. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
transverse - sagittal - and coronal
magnetic tape
high
software
28. When was ENIAC invented?
1945
computer - radiographer
bus
gray scale bit depth
29. 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.
32
ENIAC
window
byte
30. What modalities are array processors useful for?
CT and MRI
high
high-pass filtering
magnetic tape
31. What is the primary limitation with the resolution on digital images?
raster scan pattern
high
CPU - Bus
voltage
32. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
write memory
32
1960s
1-2 lp/mm
33. What are the 3 classifications of digitized image filters?
read memory
low-pass - band-pass - and high-pass
high-pass filtering
scanning
34. The quality of the data acquired from the IR is measured by what three data characteristics?
frequency - contrast - and noise
IRs
band-pass filtering
bus
35. Computerized digital images are described in terms of what
RAM
number of values displayed per image side
1960s
software
36. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
CD or DVD
bus
RAM
write memory
37. What permit input/output of information to or from the CPU?
digital image
greater
32
peripherals
38. When detectors acquire their information by ____ they are receiving info from a specific area.
bit
decrease
scanning
high
39. Who or What is responsible for density changes on a digital image? On a manual image
computer - radiographer
slow scanning
200 - 500-1000
contrast
40. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
RAM - ROM
on
IRs
array processors
41. When subject contrast is high - the acquired data contrast will be ____.
accentuates or suppresses
gray scale bit depth
high
greater
42. Computer memory is often rated in terms of total ____ memory.
byte
array processors
edge enhancement filtering or sharpening
computers
43. What 3 things were required prior to digital computer applications in medical imaging?
write memory
little
mathematical theory - solid-state electronics - and microchip technology
matrix size
44. Around what time did digital computerization come out for CT and US?
matrix size
hardware
1970s-1990s
window width
45. What is a square series of boxes that gives form to the image?
parallel - serial
matrix
slow scanning
matrix size
46. If the window level increases - density will _____.
large amount
mathematical theory - solid-state electronics - and microchip technology
increase
accentuates or suppresses
47. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
RAM
large amount
smoothing
band-pass filtering
48. What can memory be transferred as?
pixel size
voltage
pixel
computers
49. Digitalization of analog information (increases / reduces) the quality and quantity of information?
peripherals
memory
low
reduces
50. The ____ is the heart of the computer while the ___ is the vessels.
low-pass - band-pass - and high-pass
byte
window width
CPU - Bus