Safety

Question 1

What is exposure? Measured in?

Answer 1

Capacity of x-rays to ionize air. Measured in Roentgen (R).

Question 2

What is absorbed dose? Measured in?

Answer 2

Total energy absorbed by any type of ionizing radiation per unit of mass. Measured in Gray (Gy).

Question 3

What is effective dose? Measured in?

Answer 3

Estimates risk in humans. Measured in Sieverts (Sv).

Question 4

What is the primary risk of radiography?

Answer 4

Cancer.

Question 5

What is non-linear threshold hypothesis?

Answer 5

Increased dose=increased risk. Therefor, no safe dose.

Question 6

What is ALARA?

Answer 6

As Low As Reasonably Possible.

Question 7

What should you do first before taking radiographs?

Answer 7

Clinical exam.

Question 8

Are lead aprons required?

Answer 8

Only with thyroid collars in children.

Question 9

With increased caries risk, when should repeate radiographs be conducted?

Answer 9

Child=Posterior bitewings 6-12 months

Adult= P BW 6-18 months

Question 10

With low risk caries patients, whats the recall radiographs times?

Answer 10

Child= 12-24 months
Teen=18-36
Adult=18-36