ARRT Definitions FINAL EXAM GUIDE 2025
|MOST COMMON QUESTIONS WITH CORRECTLY
VERIFIED ANSWERS|ALREADY A+
GRADED|GUARANTEED PASS
spatial resolution - sharpness of the structural edges recorded in an image
receptor exposure - amount of radiation that strikes the image receptor
brightness - measurement of the luminescence of an area in a radiographic image
displayed on a monitor; units are in candela (cd) per square meter
contrast - the visible difference between any two selected areas of brightness level within
the displayed image
grayscale - refers to the number of brightness levels visible on an image and is linked to
the bit depth of a system
long scale - when slight differences between gray shades are present, but the total
number of gray shades is great
low contrast - when slight differences between gray shades are present
short scale - when major differences between gray shades are present, but the total
number of gray shades is small
high contrast - when major differences between gray shades are present
receptor contrast - a fixed characteristic of the receptor
contrast resolution - the smallest exposure change or signal difference that may be
detected
quantization - the number of bits per pixel
exposure latitude - the range of exposures that produces a quality image at an
appropriate patient dose
|MOST COMMON QUESTIONS WITH CORRECTLY
VERIFIED ANSWERS|ALREADY A+
GRADED|GUARANTEED PASS
spatial resolution - sharpness of the structural edges recorded in an image
receptor exposure - amount of radiation that strikes the image receptor
brightness - measurement of the luminescence of an area in a radiographic image
displayed on a monitor; units are in candela (cd) per square meter
contrast - the visible difference between any two selected areas of brightness level within
the displayed image
grayscale - refers to the number of brightness levels visible on an image and is linked to
the bit depth of a system
long scale - when slight differences between gray shades are present, but the total
number of gray shades is great
low contrast - when slight differences between gray shades are present
short scale - when major differences between gray shades are present, but the total
number of gray shades is small
high contrast - when major differences between gray shades are present
receptor contrast - a fixed characteristic of the receptor
contrast resolution - the smallest exposure change or signal difference that may be
detected
quantization - the number of bits per pixel
exposure latitude - the range of exposures that produces a quality image at an
appropriate patient dose
