Th - Medical aspects of radiotherapy

Question 1

What is brachytherapy?

Answer 1

Where they put the radiation source close to the tumor

Question 2

What is brachytherapy used for? (2)

Answer 2

Gynaecological and urological tumors

Question 3

What does GVT stand for?

Answer 3

Gross tumor volume

Question 4

What does CTV stand for?

Answer 4

Clinical target volume

Question 5

What does PTV stand for?

Answer 5

Planning target volume

Question 6

What kind of disease does GVT account for?

Answer 6

Macroscopic disease

Question 7

What kind of disease does CTV account for?

Answer 7

Microscopic disease

Question 8

What does PTV account for?

Answer 8

Variation in patient positioning

Question 9

When do early effects of radiotherapy take place?

Answer 9

<90 days

Question 10

When do late effects of radiotherapy take place?

Answer 10

> 90 days

Question 11

Where do early effects of radiotherapy take place?

Answer 11

Fast dividing tissues

Question 12

Where do late effects of radiotherapy take place?

Answer 12

Slow dividing tissues

Question 13

Name 4 advantages of MRI-guided radiotherapy

Answer 13

Soft-tissue setup (Direct visualization of tumor and adjacent organs),
continuous online monitoring (check what you’re treating),
real-time gating (restrict what you’re treating),
adaptive treatment planning (treat what you’re seeing, plan of the day)