Radiology Chapter 30 Panoramic Radiography

Front 1

What does panoramic mean

Back 1

wide view

Front 2

What are the 4 things a panoramic is used for?

Back 2

Examining large areas of the face and jaws

Locating impacted teeth or retained root tips

Evaluating trauma,lesions, and diseases of the jaws

Assessing growth and development

Front 3

What else could panoramic radiographs help aid in the evaluation of?

Back 3

Large caries

periodontal disease

Front 4

It is important to note that research on the use of panoramic radiographs cautions against using panoramic images as a screening film for what?

Back 4

Occult diseases

Front 5

Panoramic radiography is based on the principle of what?

Back 5

Tomography

Front 6

Where is focal trough wider and narrower at?

Back 6

wider- Posterior

Narrow- Anterior

Front 7

All panoramic x-ray machines have four basic components what are they?

Back 7

Rotational x-ray tube head

Cassette holder or digital image receptor

Head positioner guides

Exposure control panel

Front 8

To correctly align the dental arches within the other dimensions of the focal trough the radiographer must be able to determine the location of three facial landmarks what are they?

Back 8

Midsaggital plane

Ala-tragus line

Fankfort plane

Front 9

The midsagittal plane must be positioned how for the correct lateral (left-right) position?

Back 9

Perpendicular to the floor

Front 10

The ala tragus line must be positioned how?

Back 10

Approximately 5 degrees down toward the floor

Front 11

when the ala tragus line is positioned correctly what else is in correct position

Back 11

Frankfort plane

Front 12

Is a thyroid collar used for panoramic radiographs

Back 12

No must be removed just lead apron is used

Front 13

The appearance of a reversed smile (frown) results when?

Back 13

Chin is raised to high

Front 14

The palatoglossal air space appears as a radiolucency between the what?

Back 14

Palate and tongue

Front 15

The nasopharyngeal air space appears as a radiolucency where?

Back 15

Posterior to the nasal cavity

Front 16

The Glossopharyngeal air space appears as a radiolucency where?

Back 16

Portion of the pharynx located posterior to the tongue and oral cavity

Front 17

The negative shadow the nasopharyngeal air space looks like?

Back 17

Radiolucent diagonal streak located superior to the radiopaque soft palate

Front 18

When is the negative shadow of the nasopharyngeal air space emphasized

Back 18

chin is incorrectly tipped down

Front 19

How does the glossopharyngeal air space negative shadow appear?

Back 19

Vertical radiolucent band superimposed over the ramus of the mandible

Front 20

when is the palatoglossal air space appear more?

Back 20

If the tongue is not correctly positioned against the palate during exposure

Front 21

Where does the radiolucency of the palatoglossal air space appear?

Back 21

Superimposed on or above the apices of the maxillary teeth

Front 22

The focal trough is what?

Back 22

the area between the x-ray source and the image receptor where structures will be imaged clearly on the radiograph

Front 23

Structures positioned outside of the focal trough will be?

Back 23

Blurred out of the image

Front 24

The x-ray beam penetrates the patient from?

Back 24

the back of the head

Front 25

Positioning the arches too far forward in the focal trough produces what?

Back 25

Blurred and narrow anterior teeth

Front 26

Positioning the arches to far back in the focal trough produces what/

Back 26

Blurred and widened anterior teeth

Front 27

Positioning the arches to far to the lateral results in what?

Back 27

Narrowed teeth on the side closer to the image receptor and magnified teeth on the side closer to the x-ray tube head