Pracs

Question 1

Where is the laser, room lights, SSD and field on the varian pendant?

Answer 1

Laser - 2nd row 1st button
Room - 3rd row 1st button
SSD - 3rd row 2nd button
Field - 3rd row 3rd button

Question 2

Where is the room lights, SSD and field on the elekta pendant?

Answer 2

Room - 1st row 3rd button
SSD - 1st row 2nd button
Field - 1st row 1st button

Question 3

How do you change between machine control and field size on a varian pendent?

Answer 3

Group and Assym buttons, left - machine, right - field sizes

Question 4

What is the isocentre?

Answer 4

Point of intersection o the 3 axes of rotation, gantry col and base couch. Point in space indicated by the lasers

Question 5

What is beam divergence?

Answer 5

Field light which diverges as it moves away from the source, by the inverse square law

Question 6

How do you set up a lung? What type beam?

Answer 6

Supine, standard HR, arms above head, BUK, parallel opposed

Question 7

How do you set up a breast? What type of beam?

Answer 7

Supine, breast board or vac bag, standard HR, hands above head in supports, BUK, tangential

Question 8

How do you set up prostate? What type beam?

Answer 8

Supine, standard HR, hands chest, BUK, empty rectum, full bladder, 4 field box or sunrise

Question 9

How do you set up whole brain/head and neck? What type beam?

Answer 9

Supine, yellow HR, hands by sides or ropes, BUK, head mask, parallel opposed

Whole brain - line to tragal notch, inferior Y1 to 0, line up baseline with supraobital margin