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. Digital detectors are capable of producing ______ shades of gray.
1000+
abacus
electronic sources
data
2. 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?
200 - 500-1000
bus
ROM
analog computers
3. 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.
magnetic tape
byte
peripherals
high-pass filtering
4. What is high-pass filtering also called?
RAM
edge enhancement filtering or sharpening
ROM
IRs
5. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
programs and data
Input devices
number of values displayed per image side
window
6. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
computers
array detection
fine
detector
7. What determines resolution?
pixel size
expansion or compression
voltage
filtering
8. What is the name of the 'modern electronic computer'?
ENIAC
bus
little
monitors and printers
9. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
binary machine
parallel - serial
monitors and printers
1-2 lp/mm
10. What does DICOM stand for?
binary machine
fine
digital imaging and communication in medicine
hardware
11. What was the earliest computer device called?
abacus
IR
2^x
magnetic tape
12. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
large amount
parallel - serial
scanning
monitors and printers
13. Which type of information consists of operating instructions?
program
number of values displayed per image side
smaller
smoothing
14. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
parallel - serial
CPU - Bus
data
voxel
15. 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?
transverse - sagittal - and coronal
binary machine
health level 7
frequency - contrast - and noise
16. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
Fourier Transformation
bus
greater
expansion or compression
17. Noise is measured as what?
DICOM standard
expansion or compression
signal-to-noise ratio
matrix
18. What are devices that process information?
little
health level 7
2^x
computers
19. Which type of information consists of collected facts?
array detection
data
1000+
central processing unit
20. What is the primary limitation with the resolution on digital images?
matrix
frequency - contrast - and noise
raster scan pattern
computers
21. Computerized digital images are described in terms of what
programs and data
DICOM standard
decreased
number of values displayed per image side
22. What directs information to and from various parts of the computer?
32
central processing unit
increase
bus speed
23. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
digital computers
signal-to-noise ratio
1-2 lp/mm
matrix
24. What is the name for an 8-bit word?
byte
bus speed
voxel
accentuates or suppresses
25. What changes the pixel value by multiplication or division and controls image contrast?
window width
numerical value
frequency - contrast - and noise
mathematical theory - solid-state electronics - and microchip technology
26. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
array processors
digital imaging and communication in medicine
bus speed
low
27. Modalities differ in bit depth that is available depending on the capabilities of what?
raster scan pattern
software
IR
Input devices
28. A __ _____ disk will store over 10000000 bytes of information.
digital image
decrease
10 megabyte
numerical values
29. What is the 'heart' of every computer?
central processing unit
DICOM standard
frequency
progressive scanning
30. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
array detection
abacus
digital computers
peripherals
31. What are the 3 classifications of digitized image filters?
expansion or compression
window width
CD or DVD
low-pass - band-pass - and high-pass
32. What is the measure of the differences between the data values referred to as?
contrast
transverse - sagittal - and coronal
frequency - contrast - and noise
32
33. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
computers
inversely
ROM
raster scan pattern
34. What input device do radiographers use on a normal basis?
IRs
digital imaging and communication in medicine
numerical values
software
35. Noise is ____ related to contrast.
inversely
smaller
inverse
monitors and printers
36. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
TV camera
filtering
scanning or array detection
smoothing
37. If window width increases - image contrast will ____.
abacus
frequency - contrast - and noise
large amount
decrease
38. Digitalization of analog information (increases / reduces) the quality and quantity of information?
reduces
binary machine
analog-to-digital converters
32
39. Resolution is controlled by what?
software
matrix size
TV camera
signal-to-noise ratio
40. The quality of the data acquired from the IR is measured by what three data characteristics?
10 megabyte
frequency - contrast - and noise
pixel
low-pass - band-pass - and high-pass
41. Digital detectors are capable of producing ______ shades of gray.
detector
bus speed
detector
1000+
42. When detectors acquire their information by ____ they are receiving info from a specific area.
low-pass filter
off
scanning
1-2 lp/mm
43. What does DICOM stand for?
software
hardware
digital imaging and communication in medicine
band-pass filtering
44. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
numerical value
bus
digital imaging and communication in medicine
window
45. What type of scanning increases resolution slightly by scanning all 525 lines in order?
progressive scanning
matrix size
ROM
CD or DVD
46. What directs information to and from various parts of the computer?
number of values displayed per image side
central processing unit
window level
pixel
47. What was the earliest computer device called?
high
large amount
computer - radiographer
abacus
48. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
ROM
central processing unit
analog-to-digital converters
gray scale bit depth
49. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
peripherals
pixel size
digital imaging and communication in medicine
Fourier Transformation
50. A low contrast image has a ___ frequency.
digital imaging and communication in medicine
increase
bandwidth
low