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Related Flashcards
Cards In This Set
| Front | Back |
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Computer from the past used to be what kind of memory and how much kb?
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8 track memory, 18 kb rom 128X128
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Computer has 5 main parts
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q Input
q Processing
q Memory
q Storage
q Output
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The computer input does what
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It is ways to put in information (ways to enter info, keyboards,cd)
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What is the brain of the computer?
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Processing
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What kinds of memory is used in a computer? what is memory?
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Permanent (primary) and temperary
memory is used to store input and output data
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What are the two types of memory?
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RAM=randon access memory which is prime memory
ROM is secondary (read only) and not easily accessed
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What are application programs?
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Programs you buy after you get the computer. (quicken,excell)
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Computer science
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Binary =bit or binary digit; is either 0 or 1/ 8 bits= 1 byte, 255 in decimal form. one million bytes is referred to as one megabyte or 1MB
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Digital imaging is?
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Images that comes after converter. changes image to digital image. A numeric representation of the xray intensities that are transmitted through the patient.
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Pixels are?
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Picture element, each cell in the image matrix/grid.
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Image matrix
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Layout of cells in rows and columns
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Image matrix size (FOV)
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Total pixels =#rows X #columns
the more pixels the better the resolution
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Digital imaging requires whats?
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Hardware and software applications to process images. systematic application of highly complex mathematical formulas called algorithms (applied to image in cassette to produce better images)
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Digital imaging modalities
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• Computed Tomography (CT)
• Sonography
• Nuclear Medicine
• Magnetic Resonance (MRI)
• Mammography
• RadiographyAngiography
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Conventional imaging
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Different cassette/film size (6 sizes)
2 intensifying screen speeds-detailed extremity screen 100 speed. rare earth 400 speed or greater. elbow and ankle down use more radation. lose detail w/ high speeds
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