Lab 9 Resource Sheet - Pituitary Flashcards
1
Q
position of patient and devices used
A
supine B HR S-frame w/ short mask HOC holding ring knee sponge
2
Q
technique
A
SAD
3
Q
machine and energy
A
6 MV
4
Q
field arrangement
A
SAD laterals and vertex
5
Q
CT scanning borders
A
Superior: top of skull with flash
Inferior: low neck including the clavicles
6
Q
field borders
A
CAX in the center of the pituitary
Use a 4x4 cm field
RT Lateral:
Collimator: 130
LT Lateral:
Collimator: 230
Vertex:
Gantry: 130
Collimator: 180
Couch: 90
7
Q
contour
A
Rt eye
Lt eye
pituitary
8
Q
prescription
A
180 cGy/fx x 25 fx = 4500 cGy