QA

Question 1

QA definition

Answer 1

process of conducting measurements regularly to ensure that any piece of equipment is performing to satisfactory level under IRMER

Question 2

benefits of QA

Answer 2

regular and effective QA should reduce risk of error effecting patients, particularly around under/over dosing.

Question 3

2 important reasons for QA

Answer 3

radiation cannot be withdrawn - only sometimes can it be compensated for

improvements in hypo fractionation means greater impact on pt if radiation delivered is wrong (e.g. breast hypo fractionation from 40gy/15# (6.66% per #) to 26gy/5# (20% per #)

Question 4

what is a tolerance

Answer 4

how far off of a prescribed target a measurement can be

Question 5

3 categories of QA

Answer 5

safety
dosimetric
geometric

Question 6

give 3 safety QAs

Answer 6

break gate
touchgaurds
safety signage

Question 7

give 3 dosimetric

Answer 7

MU calibration

Question 8

give 3 geometric

Answer 8

laser alignment
couch shift calibration
FSD calibration