Digital Radiography/ Computed Radiography:
Principles test questions with verified Answers
1. Radiography was first introduced by_______, in what year - Answer-Fuji;
1981
2. _______ radiography: has photostimulable storage phosphor imaging -
Answer-Computed(CR)
3. Digital radiography uses what 2 acquisitions? - Answer-Indirect and direct
4. What uses a 2-part process involving a scintillator and a photodetector? -
Answer-Indirect acquisition
5. ______: directly convert incoming xray photons to an electronic signal -
Answer-Direct acquisition
6. What does direct acquisition use? - Answer-Selenium
7. All medical imaging is achieved with ________ - Answer-Digital
computers
8. What does ADC stand for? - Answer-Analog to digital converters
9. DAC stands for_____ - Answer-Digital to analog converters
10.Computers mange data using ____ ____ language - Answer-Binary
machine
11.Binary system operates with how many symbols? - Answer-2
12.Each binary number is called a ____ - Answer-Bit
13.An eight word bit is called a ____ - Answer-Bute
14.Nominal numbers function on a base of ____ system - Answer-10
15.What are 4 digital image characteristics? - Answer- Matrix, Pixel, Voxel,
Bit depth
, Digital Radiography/ Computed Radiography:
Principles test questions with verified Answers
16.A digital computerized radiography image matrix is at least ___×___; which
equals ____ pixels - Answer-512×512; 262,144
17.If you increase matrix size, what will you do to your resolution? - Answer-
Increase resolution
18.______: size of the examination area - Answer-Field of view (FOV)
19.Square in the image matrix is called a picture element or a ____ - Answer-
Pixel
20.Pixel size determines the ______ - Answer-Resolution
21.Smaller pixels= ______ resolution - Answer-Better
22.FOV÷matrix size gives you_____ - Answer-Pixel size
23.What size pixels would a larger matrix for the same FOV produce? -
Answer-Smaller
24.Each pixel corresponds to a ____ - Answer-Voxel
25.Voxel is a ____ volume of ____ - Answer-3D; tissue
26.Numerical value in the Voxel is expressed in the ____; also assigned a ____
- Answer-Pixel; brightness level
27.Gray scale bit depth is the number of____ - Answer-Shades of gray
28.Bit depth differs between_____ - Answer-Imaging modalities
29.Bit depth depends on the _____ - Answer-Image receptor
30.Bit depth: numerical value expressed in the ____ number system (based on
powers of __) - Answer-Binary; 2
31._____: change input values of the pixels - Answer-Image processing
operations
Principles test questions with verified Answers
1. Radiography was first introduced by_______, in what year - Answer-Fuji;
1981
2. _______ radiography: has photostimulable storage phosphor imaging -
Answer-Computed(CR)
3. Digital radiography uses what 2 acquisitions? - Answer-Indirect and direct
4. What uses a 2-part process involving a scintillator and a photodetector? -
Answer-Indirect acquisition
5. ______: directly convert incoming xray photons to an electronic signal -
Answer-Direct acquisition
6. What does direct acquisition use? - Answer-Selenium
7. All medical imaging is achieved with ________ - Answer-Digital
computers
8. What does ADC stand for? - Answer-Analog to digital converters
9. DAC stands for_____ - Answer-Digital to analog converters
10.Computers mange data using ____ ____ language - Answer-Binary
machine
11.Binary system operates with how many symbols? - Answer-2
12.Each binary number is called a ____ - Answer-Bit
13.An eight word bit is called a ____ - Answer-Bute
14.Nominal numbers function on a base of ____ system - Answer-10
15.What are 4 digital image characteristics? - Answer- Matrix, Pixel, Voxel,
Bit depth
, Digital Radiography/ Computed Radiography:
Principles test questions with verified Answers
16.A digital computerized radiography image matrix is at least ___×___; which
equals ____ pixels - Answer-512×512; 262,144
17.If you increase matrix size, what will you do to your resolution? - Answer-
Increase resolution
18.______: size of the examination area - Answer-Field of view (FOV)
19.Square in the image matrix is called a picture element or a ____ - Answer-
Pixel
20.Pixel size determines the ______ - Answer-Resolution
21.Smaller pixels= ______ resolution - Answer-Better
22.FOV÷matrix size gives you_____ - Answer-Pixel size
23.What size pixels would a larger matrix for the same FOV produce? -
Answer-Smaller
24.Each pixel corresponds to a ____ - Answer-Voxel
25.Voxel is a ____ volume of ____ - Answer-3D; tissue
26.Numerical value in the Voxel is expressed in the ____; also assigned a ____
- Answer-Pixel; brightness level
27.Gray scale bit depth is the number of____ - Answer-Shades of gray
28.Bit depth differs between_____ - Answer-Imaging modalities
29.Bit depth depends on the _____ - Answer-Image receptor
30.Bit depth: numerical value expressed in the ____ number system (based on
powers of __) - Answer-Binary; 2
31._____: change input values of the pixels - Answer-Image processing
operations
