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Chapter 2

Compensating Filters

QuestionAnswer
Compensating filter
Three radiographic exams that would benefit from use of compensating filters AP projection of the thoracic spine Axiolateral projection of the hip (Danelius Miller method) Axiiolateral projection of the lateral cervicothoracic region (Swimmer's technique)
Common filter shape Wedge
Common filter material Aluminium Plastic Pb
Two types of filters Collimator-mounted filter Contact filter
Placement of Contact filter Directly on patient or between IR and anatomy
Where is Wedge filter used? Where tissue density varies gradually along the long axis (AP projection of the thoracic spine)
Where is trough filter used? Where the subject density in the center is much greater than at the edges (PA projection of the chest)
Where is Ferlic swimmer's filter used?
Boomerang filter Contact filter that conform to the shape of the shoulder.
Scoliosis filters
Created by: iphil_cristiano
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