IMAGE DETAIL HIGH YIELD

Question 1

what are the important variables to consider for image detail?

Answer 1

geometric sharpness

object distortion

object motion

radiographic mottle

Question 2

geometric sharpness decreased by?

increased by?

Answer 2

increased magnification

beam penumbra

Question 3

what is the affect of object thickness on object distortion?

Answer 3

thick objects are more distorted

Question 4

what is the affect of object position on object distortion?

Answer 4

an object plane and image that are not parallel are more distorted

Question 5

object motion is minimized by longer or shorter exposure? and done how?

Answer 5

shorter

electronic timers and doble film screens

Question 6

what are the factors of radiographic mottle?

*what is another consideration

Answer 6

insignificant factors like film graininess and defects in the phosphor layer

quantum mottle occurring with shorter exposure times

*thicker screens (faster screens) yield same noise as slow screens

Question 7

how is quantum mottle reduced?

Answer 7

w/ high mAs, low kVp, slow image receptors

Question 8

what is quantum mottle a result of?

Answer 8

statistical fluctuation in # of photons per unit area of x-ray beam