Interaction of x-rays with matter(effects of beam attenuation on image) Flashcards

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1
Q

how do we get contrast on an xray image

A

it occurs due to xray photon absorption

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2
Q

describe what the different shades on an xray image represent

A

black- areas of radiolucence where xray photons have been transmitted

white areas are areas that are radiopaque and they demonstrate areas of xray photon absorption

grey areas demonstrate a mix of absorption and transmittion

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3
Q

describe a high contrast xray image

A

these are very black and whit as there is a lower kv setting used so fewer xray photons are transmitteed

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4
Q

describe a low contrast xray image

A

has much more grey areas and these occur when a much higher kv setting is used so there is less absorption and more transmission

there is also forward scatter

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