RT 103 Chapter 2

Question 1

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

Answer 1

Wedge Filter

Question 2

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

Answer 2

Trough filter

Question 3

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.

Answer 3

The Ferlic Swimmer’s filter

Question 4

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

Answer 4

The Boomerang Filter

Question 5

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

Answer 5

The scoliosis filter

Question 6

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

Answer 6

Supertech wedge filter

Question 7

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

Answer 7

Trough filter

Question 8

A filter used for AP projections of shoulder and facial bones

Answer 8

Boomerang filter

Question 9

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

Answer 9

Ferlic Swimmer’s Filter

Question 10

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

Answer 10

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Question 11

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

Answer 11

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