Question | Answer |
Define computer. | Any general purpose, stored-program electronic digital computer. |
Define hardware. | Parts of the computer you can touch. |
Define software. | Programs. |
What does MODEM stand for? | Modulator/Demodulator
Digital-->Analog |
RAM | Random Access Memory |
ROM | Read Only Memory |
RIS | Radiology Info. System |
HIS | Hospital Info. System |
PACS | Picture Archiving and Communication System |
DICOM | Digital Imaging Communication |
Bit | Binary digit "0 or 1" |
Byte | Eight bits |
Pixel | Picture element |
Modern day computers use ___ to store info. | Silicon chips |
The ___ is an example of computer input hardware. | mouse |
In computerized medical imaging equipment, such as CT scanners, the computers use ___ processing. | real-time |
T/F Computed radiography cassettes and film/screen cassettes can be used interchangeably with any x-ray imaging system. | True |
Computed radiography screens respond to radiation with ____. | Photostimulable luminescence |
A photostimulable phospher in a metastable state will emit light ... | immediately, when stimulated by light, over time |
The computed radiography cassette is called a(n).. | imaging plate |
The photostimulable phospher screen is handled in a .. | reader |
The computed radiography is made up of ... modules. | mechanical, optical, computer |
T/F The digital imaging plate can sit for some time after the erase cycle. | False |
CR and screen-film imaging both have a... | latent image |
T/F Spatial resolution, contrast resolution, noise, and artifacts are identical in screen-film imaging and CR. | False |
The principal source of noise in CR is... | scatter radiation |
With CR the contrast is... | constant regardless of radiation exposure |
The CR image has __ exposure latitude and __ contrast resolution. | wide/improved |
Flooding the erased imaging plated with bright light prevents ... | Ghosting |
In DR, the latent image is formed on the.. | radiation detector |
In DR, each matrix pixel represents... | atomic number and mass density |
In DR, the brightness of the image is determined by ... | pixel values |
In DR, spatial resolution is improved with increased... | matrix size |
The number of visible shades of gray in a digital image is determined by ... | bit depth |
The dynamic range determines the degree of __ in the image. | contrast resolution |
Spatial resolution is determined by the ratio of __ to __. | field of view / matrix size |
CR uses a ___ for latent image formation. | Photostimulable phosphor |