radiology oncology

Question 1

penetrating ability is low, ionizing ability is high

Answer 1

alfa particles

Question 2

penetrating ability is relatively low, ionizing ability is also relatively low

Answer 2

beta particles

Question 3

penetrating ability is hihg, ionizing ability is low

Answer 3

gamma (y) particles

Question 4

electrons

Answer 4

used to treat melanomas

Question 5

photons

Answer 5

loose their energy troughout the tissue

Question 6

protons

Answer 6

loose their energy all at one point

Question 7

by what are side effects or radiation determined

Answer 7

by the slow down of cell division in surrounding healthy tissue

Question 8

how can you make the therapeutic window bigger

Answer 8

fractionation of total dose
lower dose to normal tissue
technical things
enhancement of sensitivity

Question 9

what are early side effects of radiotherapy

Answer 9

mucositis, dermatitis, pneumonitis, alopecia,

Question 10

what are late side effects of radiotherapy

Answer 10

proctitis, myelopathy, secondary tumours

Question 11

what are chronic side effects of radiotherapy

Answer 11

fibrosis

Question 12

for what is iridum 192 wire used

Answer 12

to treat gynaecological or oesophageal tumours

Question 13

for what is ruthenium 106 plaques used

Answer 13

eye tumours

Question 14

for what is iodine 125 seeds used

Answer 14

prostate cancer