Quality Assurance

Question 1

QA

Answer 1

Arrangements to ensure quality control measures are effective and can lead to relevant change.

Question 2

QC

Answer 2

Specific measure for ensuring and verifying quality of radiographs produced.

Question 3

QAudit

Answer 3

External reassurance that QA and QC are satisfactory and work effectively.

Question 4

IRMER 2000

Answer 4

Chapter 5
Practictioners/operators expected to know principles of QA/C with equipment techniques.
Implementation responsibility of named person.
Frequency of operations/ supporting content defined.
Frequency of formal checking of records.

Question 5

IPEM 91

Answer 5

Chaper 9 - Dental imaging
Level A: Can be performed by dental staff
Level B: Complex, usually physicist

Question 6

Subjective quality rating

Answer 6

Excellent - no errors of exposure, positioning or processing. 70%
Diagnostically acceptable - some errors tat don’t detract from diagnosis. 20%
Unnaceptable. 10%

Question 7

Image quality

Answer 7

Analyse every 6 months.
Retrospectively or prospectively.
Corrective action if targets not reached.

Question 8

Film reject log

Answer 8

Record;
Date, fault, cause and corrective action, repeats and total in time period.
Calculate grade 3 film.

Question 9

Patient dose and equipment

Answer 9

1: Critical examination by installer
2: Acceptance test - before equipment used clinically to determine baseline performance and assess representative patient dose.

Question 10

Routine tests

Answer 10

Done by physicist.
Include diagnostic reference levels. 
Complement regualr maintnance checks - annually if problems.
Repeated if equipment...
Relocated, modified, repaired.

Question 11

Darkroom/ daylight hood

Answer 11

Daily - surface cleanliness
6-12m - Light tightness, check safelights, filter and distance from work surface.
Coin test - need at least 1min before film fogs.

Question 12

Xray film storage

Answer 12

Cool dry place
Away from sunlight
Store on side

Rotate stock - old film will fog

Question 13

Cassettes

Answer 13

Put in bright light and expose

If dark around edges cassettes getting old and need replacing

Question 14

Digital image receptors

Answer 14

Check image uniformity every 3 months with low exposure.

Every months check plates, cables and sensors and clean if needed.

Question 15

Chemical processing

Answer 15

Fill fixer tank first
use correct temp
Change every 2 weeks and keep records

Question 16

Processor checks summary

Answer 16

Daily:
Check and replace solutions, change water in wash tank, run cleaner film through each morning.
Weekly:
Clean rollers
Fortnight:
Change chemicals, wash transport mechanisms and tank.
6 months:
Check diagnostic loader with coin test
Annually:
Service machine