RT 103 Chapter 2 Flashcards Preview

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Flashcards in RT 103 Chapter 2 Deck (11):

Filter applications: Used for areas of the body where tissue density varies gradually from one end to the other along the long axis of the body

Wedge Filter


Filter applications: Used for areas of the body where the subject density in the center is much greater than at the edges.

Trough filter


Filter applications: A collimator mounted filter created to improve imaging of the lateral projection of the cervicothoracic region, but also used for the axiolateral projection of the hip.

The Ferlic Swimmer's filter


Filter applications: Designed to conform to the shape of the shoulder, but can be used effectively for lateral facial bone images.

The Boomerang Filter


Filter applications:Used with two of the most challenging projections to obtain: the PA and lateral full-spine projections for evaluation of spinal curvatures.

The scoliosis filter


A collimator-mounted Clear Pb filter used for AP projections of the hips, knees, ankles on long (51-inch) film

Supertech wedge filter


A collimator-mounted aluminum filter with double wedge used for AP projections thoracic spine

Trough filter


A filter used for AP projections of shoulder and facial bones

Boomerang filter


A collimator-mounted filter used for lateral projections of cervicothoracic region (swimmer's technique

Ferlic Swimmer's Filter


Examples of x-ray projections that have to show a significantly varied tissue density:
1. The anteroposterior (AP) projection of the thoracic spine.
2. The axiolateral projection (Danelius-Miller) method.
3. The lateral cervicothoracic region



Physical principles of compensating principles:
1. Shape- They are shaped for certain parts of the anatomy, but can also be adapted for other body structures.
2. Composition- Composed of substance of sufficiently high atomic number to attenuate the x-ray beam. (Most common materials are aluminum and high density plastics)
3. Placement- Most often placed in the x-ray beam between the x-ray beam and the patient; Two categories are collimator mounted, and Contact compensating