aapm tg36 Flashcards
1
Q
What is it on?
A
fetal dose
2
Q
what do wedges do?
A
increase dose near beam by 2-4 times
3
Q
bridge over patient
A
The simplest shielding design
consists of a bridge over the patient’s abdomen that supports
four to five half-value layers of lead (Fig. 3).15 (Four to five
half-value layers of lead is approximately 5 to 7 cm of lead
or 6 to 8.5 cm of Cerrobend.
-can also use table over patient, mobile shield
4
Q
how much does shielding reduce fetal dose?
A
50%
5
Q
dose fall off from field edge
A
