Spatial Resolution - Exposure Latitude Flashcards
what is spatial resolution?
The minimum separation between 2 objects at which they can be distinguished as 2 separate objects in the image
what does spatial resolution relate to?
the ability of an IR to extract or display adjacent small objects as separate and distinct
what are the 2 parts to spatial resolution?
receptor(extraction) display monitor(display)
what 3 things involve the receptor?
pixel pitch(sampling pitch)
sampling frequency
DELs
what 3 things involve the display monitor?
pixels
matrix
FOV
what is a pixel pitch(sampling pitch)?
the primary factor determining the spatial resolution of a digital detector
what is pixel pitch determined by in CR?
sampling frequency
what is sampling frequency?
the # of times data is recorded as the plate is being read
what is pixel pitch determined by in DR?
DEL size.
a line scan is used in DR
what is exposure latitude?
the range of exposures which produce quality images
what type of latitude does digital have?
film?
horizontal/wide
vertical/narrow
how much overexposure does digital allow?
underexposure?
200%
50%
