Røntgen basics Flashcards

1
Q

Air is radiolucent (sort) and metal/bone is…

A

Radiopaque (hvidt)

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2
Q

Hvis man gerne vil have en høj kontrast, skal kV være…

Knogle eller bløddele?

A

Lav

God til knogler

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3
Q

Underexposed (for lys), så kigger jeg på:

A

Contours:
Kan ses -> mAs op
Kan ikke ses -> kV op

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4
Q

Overexposed (for mørk), så kigger jeg på:

A

Contrast:
Good -> mAs ned
Poor -> kV ned

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5
Q

Vil en fordobling af mAs give en fordobling af densitet på billedet?

A

JA

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6
Q

Vil en fordobling af kV give en reel fordobling?

A

Nej, hvis vi vil fordoble kV på billedet skal vi øge med 10-15% på indstillingen.

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7
Q

ALARA?

A

As Low As Reasonably Achievable

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8
Q

Hvor meget bly i forklæde (appron)?

A

0,35 mm

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9
Q

Bly i handsker?

A

0,25 mm

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10
Q

Hvornår bruges grid / raster?

A

Over 10 cm object

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11
Q

Hvad bruges grid / raster til?

A

Absorb scattered radiation (compton scattering)
“Baggrundsstøj”
Bedre billedkvalitet med grid

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