QA

why do we do QA

to mantain radiation doses to a minimum

consistent image quality

ensure equipment is maintained

keep retake low

reduce servicer user error

what is the one used for

low contrast detail detectability (large circles)

sensitometric measurements (medium circles)

high contrast small detail detectability (smallest circles)

resolution (lines in the middle)

how do we use

SID and exposure should be repeatbale and reproducable

use 1mm Cu filter

place TOR CDR so line test is 45 degree angle to beam

expose

input

threshold for TOR CDR

+-2

resolution 

-2

both no suspension level

which one is this and what does it measure

leed 18fg

low contrast large detail (circles at top and bottom)

circular geometry (circle around edge)

monitor brightness level and contrast level (sqaures)

resolution (centre)

how to use

same as TOR CDR

threshold

same as TOR CDR

whats this and

beam aligment and collimation test tool

how to use this

SID and exposure repeatable and reproducabkle

place in centre of IR 

collimate to lead within test tool

input

threshold for this device

remedial ± 1cm @1m SID

suspension level ± 3cm @1 SID

what does this measure

dose

dose rate

kvp

hvl

exposure time

puleses

how to use

SID AND EXPOSURE BLAH BLAH

place test in centre

collimate to it

take a range and input (repeat)

threshold

remedial basline ± 10 percent

suspension baseline ± 20 percent

reproducibility

remadial +- 20 perc

suspension ± 50 perc

what is QA 

monitor aspect of project or service to make sure its up to standards

QC definiton

maintain or improve quality and includes monitoring 

purpose do we do qa and qc

reduce dose cost

mainitinag imaging standards

why do we do it qc and qa

to make sure we catch problems early on

ALARP principle

safety

meet IRR 1999 AND IR(ME)R 2017

WHATS IRR 2017 about section 32

commiosing - testing before first use (MP)

rotuine testing after major maintence (MP ABD STAFF)

radiation protecting dosimetry - regualr testing stuff

section 15 IRR 2017

Implemet and maintain qa

presrve instalations and provide it to who ask

whats ALARP section 12

keep dose low

medical physics expert section 14

medical physics is appointed and be involved in optimisatiomn

give advice on dosimetry

whats acceptance testing

before commsioning 

one month before warranty end

to make sure image quality is satisfactoru

HCPC radiographers must

understand qa and qc

is relevant

participate 

monitor

whats level a and level b staff

level a radiographers

b is physics team and engineers or specially trained radiographers

remedial level is

correction

suspenion

levrel to where we remove machine