Term
| the difference between adjacent densities ranging between clear whate through various shades of gray to black |
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Definition
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Term
when difference between adjacent densities are great
few shades of gray
increased contrast
low kVp
short dynamic range/window width |
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Definition
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Term
when differences between adjacent densities are minimal
many shades of gray
decreased contrast
high kVp
large dynamic range/window width |
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Definition
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Term
high kVp
equals
low contrast
long scale
wide latitude |
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Definition
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Term
low kVp
equals
high contrast
short scale
narrow latitude |
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Definition
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Term
| radiographic contrast is product of __contrast and ___contrast |
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Definition
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Term
inherent in screen-film combo
influenced by processing
OD from .25-2.5 |
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Definition
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|
Term
patient thickness
tissue mass density
effective atomic number
object shape
kVp |
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Definition
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Term
| subject contrast is determined by the __, ___, and ___ characteristics of the anatomy being examined |
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Definition
| size, shape, and attuenuating |
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Term
| ___ body sections attenuates a greater number of xrays than ___ body section |
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Definition
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Term
| different sections of the body have equal thickness but different mass densities |
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Definition
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Term
| when the effective atomic number of adjacent tissues is very different, subject contrast is very ___ |
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Definition
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Term
| all anatomical shapes have reduced subject contrast due to |
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Definition
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Term
| a low kVp results in _____, so xray beam is less penetrating requires a higher mA, resulting in a ___ patient dose |
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Definition
| high subject contrast, higher |
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Term
| ___ kVp results in low _____, or a long gray scale, and has a wide ___ in exposure factors |
|
Definition
high
subject contrast
latitude |
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|
Term
| photoelectric effect means that xrays are being ___, which will show on a radiograph as ____ |
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Definition
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