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WorksheetsExtraoral Radiographic Techniques 1
Total questions: 15
Worksheet time: 8mins
Panoramic radiograph causes a higher radiation dose than full mouth x-rays
True
False
Magnification & distortion are major drawbacks of ...
panorama
periapical x-ray
lateral cephalometric
sialography
During positioning the patient to take a panoramic x-ray, the frankfurt horizontal plane is ... to the floor
parallel
perpendicular
it doesn't matter
none of the above
In Panoramic radiography, the x-ray tube and the film rotate in opposite directions
True
False
In panoramic x-ray, an object will be sharp displayed when the central beam moves on this object with the same linear speed as on the film
True
False
Three-dimensional curved zone or image layer in which structures are reasonably well defined
Focal trough
Digital radiography
Biting fork
Tomography
If the patient doesn't swallow during taking a panoramic x-ray, a ... will be evident
maxillary sinus
palatopharyngeal air space
nasopharyngeal air space
palatoglossal air space
1 panoramic image = ... intraoral images
14
16
5
3
Digital panorama reduces the radiation by...
15%
20%
25%
30%
On panoramic X-rays, the magnification coefficient depends on the distance between the ... and the ...
sensor, object
sensor, x-ray source
object, x-ray source
The magnitude of the horizontal distortion depends on ...
distance between object & sensor
distance between object & x-ray source
distance between object & focal trough
distance between x-ray source & focal trough
In panoramic x-ray, if the structure of interest is displaced lingual to the beam, it passes ... through it, while buccal to the beam it passes ... though it
more slowly, faster
faster, more slowly
faster, faster
more slowly, more slowly
Horizontal measurements made on panoramic radiograph are reliable
True
False
As a result of the caudocranial inclination of the panoramic x-ray beam, the structures ... to the source appear ... on the image
further from, lower
further from, higher
closer, lower
closer, higher
Two images of a single object which is located in the midline
single real image
double real image
ghost image
