RADT 146: Unit 4-Radiographic Quality Exam 1 Questions with100% Correct Answers

RADT 146: Unit 4-Radiographic Quality Exam 1
Questions with100% Correct Answers
image quality

visible sharpness of the image

synonyms for image quality

-definition

-resolution

-detail

-sharpness

-visibility of detail

-edge gradient

-umbra

the opposite of detail is...

-penumbra

-blur

more dpi(dots per inch) =

better resolution

resolution

ability to image two separate objects and visually distinguish on from the other

spatial resolution

, ability to distinguish between two separate objects of high subject

-ex. bone and soft tissue

contrast resolution

ability to distinguish anatomical structures of similar subject contrast (low contrast)

increased contrast resolution

-more shades of gray

-ability to differentiate two objects

decreased contrast resolution

less shades of gray

what are some factors that affect image quality?

noise, screen and film speed, magnification, shape distortion, focal-spot blur, subject factors

noise

-random fluctuation in density

-grainy appearance on radiograph

film graininess

irregular clumping of silver halide crystals (need to be evenly spread out)

structure mottle

physical imperfections of intensifying screens (convert x-ray to light)

quantum mottle