which is true for Patient protection measures ?

general & dental health needs- before exposure

which is true on Protection guidelines recommendations ?

operator-stand at least 6 ft frm patient,angle of 90-135

which is not true on filtration?

TotalFiltration =Inherent + Added Filtration - filtered

which is not true for collimation?

Circular - produces a cone-shaped beam - 3.75 inches

LEADAPRON- 1/3rd mm pb thickness

WHICH IS NOT TRUE ABOUT POSITION-INDICATING DEVICE OR CONE : ?

Available in 3 length short-8 inch.long-16inch &mid 6 inch

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RADIATION PROTECTION

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A revision for the class Dr. Abdul Khader Sen. Lecturer Dept. of Oral Medicine & Radiology

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Questions 10

Answers

1
which is true for Patient protection measures ?
clinical examination- during exposure
Diagnostic radiography- after exposure
general & dental health needs- before exposure
patient's history- after exposure
2
Sources in Dental Radiology are ?
secondary –from irradiated tissues ofpatients
primary beam –fromsource
all of the above
stray radiation – fromX-ray tubehead
3
which is true on Protection guidelines recommendations ?
operator-stand at least 6 ft frm patient,angle of 90-135
operator-stand at least 6 ft frm patient,angle of 85-135
operator-stand at least 6 ft frm patient,angle of 90-145
operator-stand at least 6.5 ft frm patient,angle of 90-135
4
which is true about ALARA?
All ionizing radiations are harmful
all of the above
produce biological change in living cells
It can cause increase risk of cancers, birth defects
5
which is not true on filtration?
Additional filtration:•Placed in path of primary beam
TotalFiltration =Inherent + Added Filtration - filtered
Inherent filtration:•Passes to oil, aperture window
Aluminum disks added to the tube headin 0.5-mmincrements.
6
which is not true on protection - during the exposure?
Lead apron,
Thyroidcollar,
slow speed films
Film-holdingdevices
7
which is not true for collimation?
can control the size and shape of X ray beam
is fitted directly over the opening of the machine housing
Rectangular - restricts the size larger than size 2
Circular - produces a cone-shaped beam - 3.75 inches
8
which is not true ?
THYROIDCOLLAR- 0.2 mm pb thickness
LEADAPRON- 1/3rd mm pb thickness
Gloves0.5mm Pb
EyeProtection- Glasses 0.75mm Pb
9
WHICH IS NOT TRUE ABOUT POSITION-INDICATING DEVICE OR CONE : ?
Help to minimize the volume of tissueirradiated
Available in 3 length short-8 inch.long-16inch &mid 6 inch
Increase the target film distance by using longer position
used to direct the x-ray beam.
10
which is true on Protection for operator?
all of the other
Primary X-raybeam
Leakage radiation through tubehead housing.
Scattered radiation from irradiated tissues of patient

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