Radiology M4 - R1 : Extra Oral

Question 1

what does PA stand for

Answer 1

Posterio-anterior (film reader anterior, X ray cone posteriorly)

Question 2

what does AP mean

Answer 2

Anterior - posterior (film receptor posteriorly, x-ray cone anteriorly)

Question 3

what does OM stand for

Answer 3

Occipito - Mental (film receptor mental region, x -ray cone occipital)

Question 4

what are the three radiographic positioning landmark

Answer 4

radiograpghic base line - outer canthus to external auditory meatus

frankort plane

maxillary occlusal plane

Question 5

which equipment would be used in the prevention of degrading of image and reducing contrast

Answer 5

anti scatter grid

Question 6

what is compton scattering

Answer 6

when x-rays pass through tissues, some are scattered

Question 7

what increases sccatter on radiographs

Answer 7

increases in the field of the beam = more scatter produced

Question 8

which method would be used to detect fractures showing medio-lateral displacement: PA, AP, OM?

Answer 8

PA - posterior -anterior

Question 9

which method would be used to detect cysts and malignancy causing mediolateral expansion or bone destruction: PA, AP, OM?

Answer 9

PA - posterior -anterior

Question 10

which method would be used to detect good visualisations of posterior body and ramus: PA, AP, OM?

Answer 10

PA - posterior anterior

Question 11

which radiograpgh method would you use to see fractures of the body, ramus and condyle

Answer 11

lateral oblique

Question 12

what is the name of the technique used when the patient is the following:

• in a supine position
• dental tube with vertical/horizontal angulation
• patient head tilted towards the film

Answer 12

Isocentric

Question 13

a pateint holding a anti scatter grid whilst getting an x-ray - what type of radiograpgh is being taken

Answer 13

dental tube vertical angulation