2025 RTE 2563 UPDATED KEY EXAM
Questions And CORRECT Answers
Visibility - CORRECT ANSWERS brightness and contrast
Sharpness - CORRECT ANSWERS spatial resolution and distortion
Contrast - CORRECT ANSWERS window width/contrast resolution
Exposure Indicator (EI) - CORRECT ANSWERS provides a numeric value indicating the level of
radiation exposure to the digital image receptor
What sets the midpoint of the range of densities visible in the image. - CORRECT
ANSWERS window level
Subject contrast - CORRECT ANSWERS refers to the absorption characteristics of the anatomic
tissue/ the body radiographed and the quality (KVP) of the x-ray beam
Low kVp produces - CORRECT ANSWERS more absorption/higher subject contrast/Ribs
High kVp produces - CORRECT ANSWERS more transmission/ lower subject contrast/Abdomen
Long and low contrast - CORRECT ANSWERS Shades of gray/decreased contrast/wide window
width
Contrast resolution - CORRECT ANSWERS the ability of the system to distinguish between small
objects that attenuate the x-ray beam similarly.
Spatial Resolution - CORRECT ANSWERS evaluates accuracy of the anatomical structural lines
, Pixel pitch describes: - CORRECT ANSWERS Distance between the middle of one pixel to the
middle of another
If the matrix size is increased for a fixed FOV - CORRECT ANSWERS - the pixel size is decreased
(inverse relationship).
Increasing the FOV for the same matrix size will - CORRECT ANSWERS - increase the size of the
pixel and decrease the spatial resolution
Quantum noise - CORRECT ANSWERS Lack of sufficient incoming data for processing
High spatial frequency - CORRECT ANSWERS decreased waves
Modulation Transfer Function - CORRECT ANSWERS Helps us determine what we are looking at
0-100% or 0-1.0/in the System
Detective Quantum Efficiency (DQE) - CORRECT ANSWERS a measurement of the efficiency of
an image receptor in converting the x-ray exposure it receives to a quality radiographic image
What is the relationship between DQE and dose - CORRECT ANSWERS The higher the DQE of a
system, the lower the radiation exposure to produce a quality image, thereby decreasing patient exposure.
Distortion - CORRECT ANSWERS - results from radiographic misrepresentation of size or shape.
Size distortion - CORRECT ANSWERS magnification
Shape distortion - CORRECT ANSWERS - elongation or foreshortening.
Questions And CORRECT Answers
Visibility - CORRECT ANSWERS brightness and contrast
Sharpness - CORRECT ANSWERS spatial resolution and distortion
Contrast - CORRECT ANSWERS window width/contrast resolution
Exposure Indicator (EI) - CORRECT ANSWERS provides a numeric value indicating the level of
radiation exposure to the digital image receptor
What sets the midpoint of the range of densities visible in the image. - CORRECT
ANSWERS window level
Subject contrast - CORRECT ANSWERS refers to the absorption characteristics of the anatomic
tissue/ the body radiographed and the quality (KVP) of the x-ray beam
Low kVp produces - CORRECT ANSWERS more absorption/higher subject contrast/Ribs
High kVp produces - CORRECT ANSWERS more transmission/ lower subject contrast/Abdomen
Long and low contrast - CORRECT ANSWERS Shades of gray/decreased contrast/wide window
width
Contrast resolution - CORRECT ANSWERS the ability of the system to distinguish between small
objects that attenuate the x-ray beam similarly.
Spatial Resolution - CORRECT ANSWERS evaluates accuracy of the anatomical structural lines
, Pixel pitch describes: - CORRECT ANSWERS Distance between the middle of one pixel to the
middle of another
If the matrix size is increased for a fixed FOV - CORRECT ANSWERS - the pixel size is decreased
(inverse relationship).
Increasing the FOV for the same matrix size will - CORRECT ANSWERS - increase the size of the
pixel and decrease the spatial resolution
Quantum noise - CORRECT ANSWERS Lack of sufficient incoming data for processing
High spatial frequency - CORRECT ANSWERS decreased waves
Modulation Transfer Function - CORRECT ANSWERS Helps us determine what we are looking at
0-100% or 0-1.0/in the System
Detective Quantum Efficiency (DQE) - CORRECT ANSWERS a measurement of the efficiency of
an image receptor in converting the x-ray exposure it receives to a quality radiographic image
What is the relationship between DQE and dose - CORRECT ANSWERS The higher the DQE of a
system, the lower the radiation exposure to produce a quality image, thereby decreasing patient exposure.
Distortion - CORRECT ANSWERS - results from radiographic misrepresentation of size or shape.
Size distortion - CORRECT ANSWERS magnification
Shape distortion - CORRECT ANSWERS - elongation or foreshortening.
