Basic Radiation Exposure And Terminology Flashcards
Contrast
Differences in adjacent densities
The primary controlling factor of radiologic contrast
KVP
The ability to visualize very small structures on radiograph is termed
Spatial resolution
In film/screen radiography, which term is defined as the degree of blackening
Density/mAs
The equivalent term for optical density in digital imaging is
OD object distance
The controlling factors for magnification are
OID SID
If a bone is projected longer or shorter than it actually is on the radiographic image it is known as
Distortion
Which of the following is true when using computed radiography
The IR. Could be opened for a few minutes without causing the stored image to be destroyed
Final contrast and density adjustments of the radiographic image are done using a computer
Four things needed to produce x Ray
Vacuum
Source
Method to accelerate electrons
Method to stop electrons (target)
Attenuation
Anything that reduces intensity of the beam
Primary radiation
Beam of photons before it interacts with a patient
Remnant radiation
Resulting beam that is able to exit the patient
Four factors that affect radiographic quality
Receptor exposure
Contrast resolution
Spactial resolution
Distortion
Becqueral
Unit of quantity of radioactivity material
Overall acceptance characteristics of a radiograph can be termed
Radiographic quality
