click below
click below
Normal Size Small Size show me how
Chapter 2
Compensating Filters
| Question | Answer |
|---|---|
| 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 |