clinical practice

Question 1

SGRT surface guided radiation therapy

Answer 1

stereo vision tech to tract patients surface in 3D , reduces error of patient positioning

Question 2

usually works w

Answer 2

DIBH

Question 3

sterotactic radiation therapy

Answer 3

gives radiotherapy from many different angles around the body and the beams meet at the tumour.

This means tumour recieves high dose and tissues surrounding receives a low dose tf less risk of side effects

Question 4

stereotactic radiosurgery

Answer 4

stereotactic treatment to the brain, usually a single tx

Question 5

When you might have stereotactic radiotherapy

Answer 5

treats v small cancers like:
cancer spread to brain
cancer in lung
cancer in lymph nodes
spinal cord tumours

Question 6

stereotactic radiotherapy
Gys
fractions

Answer 6

high dose per fraction 5Gy-20Gy
1-8

Question 7

What is VMAT

Answer 7

delivers the dose continously as the beam rotates, the machine changes the shape and intensity of the beam as it moves

accurately shapes the dose to the tumour and reduces tx time

Question 8

Conformal radiotherapy

Answer 8

shapes the radaition beams to closely fit the tumour
IMRT and VMAT is a type of conformal RT

Question 9

IMRT

Answer 9

allows dose to be shaped to tumour by modulating the intensity of the beam.

allows different doses to be given across the tumour

Question 10

3DCT

Answer 10

basic, quicker to plan and treat
used for palliative

Question 11

types of 2D images

Answer 11

Mv images
Kv images

Question 12

what is Mv used for

Answer 12

breast ( contour and lung)

Question 13

what is kv images used for

Answer 13

bone , supraclav nodes and breast

palliative

Question 14

3D images ( Cone beam CT)

Answer 14

any IMRT/VMAT — prostate, H&N, lung, oesophagus

used from day 1-3 and uses auto match