Radiographs and interpretation Flashcards
1
Q
The clarity of the focal trough is dependent on
A
arch shape
size of patient
position of the machine
head position
2
Q
To prepare the patient in a pano - these items should be removed
A
hair pins, clips hair ties with metal glasses earrings all dentures and removable appliances necklaces if possible remove tongue or facial piercings
3
Q
what type of shield should that patient wear during a pano exposure
A
a lead apron but not a thyroid shield
4
Q
where should dentate patients bite on? edentulous pts?
A
bite block, rest on chin rest
5
Q
how should the patient be aligned to the pano machine
A
frankfort plane: superior of ear canal
Midsagittal plane: between the eyes
6
Q
during exposure where should the patient place their tongue
A
on the roof of their mouth
7
Q
what causes distortion in pan radiography (4)
A
x ray to source distance
changing rotational centre
position of subject in focal through
xray beam angulation
