Lab 9 Resource Sheet - Pituitary

Question 1

position of patient and devices used

Answer 1

supine 
B HR 
S-frame w/ short mask 
HOC holding ring 
knee sponge

Question 2

technique

Answer 2

SAD

Question 3

machine and energy

Answer 3

6 MV

Question 4

field arrangement

Answer 4

SAD laterals and vertex

Question 5

CT scanning borders

Answer 5

Superior: top of skull with flash

Inferior: low neck including the clavicles

Question 6

field borders

Answer 6

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

Question 7

contour

Answer 7

Rt eye
Lt eye
pituitary

Question 8

prescription

Answer 8

180 cGy/fx x 25 fx = 4500 cGy