RADT 1010 Test 4 Questions with Correct Answers Latest Update 2025/2026
how was density formerly measured for film - Answers densitometer
More IR exposure = - Answers More black
how many shades if grey in result of remnant radiation striking IR - Answers 1000
how many shades of grey can the human eye detect - Answers 32
how does body habitus affect brightness - Answers larger is more bright
(absorbing more radiation)
how does tissue densities affect brightness - Answers more dense=more bright
how do contrast agents affect brightness - Answers brighter (higher atomic elements)
How do pathologies affect brightness - Answers anything adding bone density is more bright
anything eating away bone tissue is less bright
how does body position affect brightness - Answers ex: lateral to axial calcaneus more bright
how does age and development affect brightness - Answers adult= most bright decreases with
age
how do patient artifacts affect brightness - Answers increases brightness
how do compensating filters control brightness - Answers increase
how does the anode heel affect change brightness - Answers increase
how does brightness change when increasing mA - Answers decrease
how does brightness change when decreasing KV - Answers increase
how does brightens change when increasing distance - Answers increase
how does brightness change when reducing scatter - Answers increase
how does AEC affect brightness - Answers makes it uniform brightness
what is contrast - Answers number of shades of grey and difference between adjacent grey
levels
window width
what is a long scale low contrast - Answers wide window width
, what is a short scale high contrast - Answers narrow window width
what is wide window width low contrast - Answers lots of grey
what is narrow ww high contrast - Answers few grey
what is subject contrast - Answers contrast amongst structures inherently
different absorption by different parts
what is image contrast - Answers shades of grey in an image
what is the result of low long and wide - Answers lots of shades of grey
what is high contrast - Answers few shades of grey very black and white
short scale narrow ww
achieved by low KV
what is low contrast - Answers long scale wide ww
many shades of grey
achieved by high KV
what is dynamic range - Answers the range of grey levels available to construct an image
the number of greys each pixel can have
set by system software
greater dynamic range more shades of grey
how many shades of grey available for dynamic range - Answers 4096
what is subjective contrast - Answers tonal difference as they appear to the observer
what is objective contrast - Answers tonal difference that can be measured and quantified
3 characteristics of matter that determine how much radiation is absorbed - Answers thickness
atomic #
density
factors that affect subject contrast - Answers subject composition
KV
how was density formerly measured for film - Answers densitometer
More IR exposure = - Answers More black
how many shades if grey in result of remnant radiation striking IR - Answers 1000
how many shades of grey can the human eye detect - Answers 32
how does body habitus affect brightness - Answers larger is more bright
(absorbing more radiation)
how does tissue densities affect brightness - Answers more dense=more bright
how do contrast agents affect brightness - Answers brighter (higher atomic elements)
How do pathologies affect brightness - Answers anything adding bone density is more bright
anything eating away bone tissue is less bright
how does body position affect brightness - Answers ex: lateral to axial calcaneus more bright
how does age and development affect brightness - Answers adult= most bright decreases with
age
how do patient artifacts affect brightness - Answers increases brightness
how do compensating filters control brightness - Answers increase
how does the anode heel affect change brightness - Answers increase
how does brightness change when increasing mA - Answers decrease
how does brightness change when decreasing KV - Answers increase
how does brightens change when increasing distance - Answers increase
how does brightness change when reducing scatter - Answers increase
how does AEC affect brightness - Answers makes it uniform brightness
what is contrast - Answers number of shades of grey and difference between adjacent grey
levels
window width
what is a long scale low contrast - Answers wide window width
, what is a short scale high contrast - Answers narrow window width
what is wide window width low contrast - Answers lots of grey
what is narrow ww high contrast - Answers few grey
what is subject contrast - Answers contrast amongst structures inherently
different absorption by different parts
what is image contrast - Answers shades of grey in an image
what is the result of low long and wide - Answers lots of shades of grey
what is high contrast - Answers few shades of grey very black and white
short scale narrow ww
achieved by low KV
what is low contrast - Answers long scale wide ww
many shades of grey
achieved by high KV
what is dynamic range - Answers the range of grey levels available to construct an image
the number of greys each pixel can have
set by system software
greater dynamic range more shades of grey
how many shades of grey available for dynamic range - Answers 4096
what is subjective contrast - Answers tonal difference as they appear to the observer
what is objective contrast - Answers tonal difference that can be measured and quantified
3 characteristics of matter that determine how much radiation is absorbed - Answers thickness
atomic #
density
factors that affect subject contrast - Answers subject composition
KV
