IRMER Quality Assurance Flashcards

1
Q

What is the principle of radiation protection?

A

Keep radiation ALARP

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2
Q

How can you keep radiation ALARP? (3)

A
  • Optimise dosage through technique
  • Selection criteria to justify all exposures
  • Produce optimal quality images
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3
Q

Define quality assurance

A
  • Ensuring high quality images at high diagnostic yield are produced at minimum radiation dosage
  • Getting it right 1st time
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4
Q

Why do we need QA? (5)

A

Reduce need for retakes
Minimise exposure to pt
Minimise cost
Minimise inconvenience
Save time

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5
Q

From legal POV why is QA needed?

A

IRMER 2017 legislation
Employers must implement and maintain QA programme

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6
Q

Who is responsible for QA?

A

Named person should be implementing QA
Whole dental team involved

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7
Q

Features of a QA programme?

A
  • Comprehensive
  • Evidence-based
  • Convenient to operate and maintain
  • Formally recorded
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8
Q

What 4 areas should a QA programme cover?

A
  1. QA IRMER 2017 employer’s procedures
  2. QA X-ray equipment and pt dose
  3. QA image processing and display equipment
  4. QA image quality
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9
Q

What does QA IRMER 2017 employers procedures involve?

A

Radiation protection file
Procedures for training

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10
Q

What is the radiation protection file?

A

Documents, procedures and records for safe use of X-ray equipment

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11
Q

What interval is radiation protection file reviewed at?

A

No more than 3 years

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12
Q

What does QA X-ray equipment and pt dose involve?

A
  • Inventory of all x-ray equipment
  • Records of testing
  • In house checks
  • Representative pt doses
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13
Q

What are the 4 ways dental x-ray equipment is checked?

A

Critical examination
Adequate testing
Routine testing
QA in-house checks

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14
Q

Whats the critical examination? When is it done?

A
  • Done before equipment brought into practice
  • For correct operation of safety features and warning devices
  • Gives employer info about proper use, testing and maintenance
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15
Q

What is adequate testing? When/who done by?

A
  • Prior to equipment being put into clinical use
  • Often performed by installer same time as critical examination
  • Confirms equipment operates correctly
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16
Q

What is routine testing? When is it done?

A

Every 3 years
Except for hand held x ray equipment = annual

17
Q

What are in house QA checks? When are they done?

A

Every 6 months
Routine surveillance checks of equipment

18
Q

What does QA of image processing and display equipment involve? (2)

A

Digital system checks:
- Image receptor
- Display screen

Film based system checks:
- Light tightness
- Processing performance
- Light box and viewing conditions

19
Q

How often should digital IO image sensors be checked?

A

Every 3 months

20
Q

What 3 checks are carried out on digital IO image sensors?

A

Visual inspection
Image uniformity
Subjective check of image quality

21
Q

What does image uniformity test involve?

A

Low dose exposure made on image receptor, assess uniformity, absence of artefacts or signs of damage

22
Q

What are the common defects on phosphor plates? (4)

A

Cracking of phosphor
Delamination of phosphor (edges peeling in)
Scratches / bite marks
Debris on plate
Bending of plate (soft thick line across plate)

23
Q

What does a subjective image quality assessment involve?

A

Normal exposures made with same x ray set, using a step wedge / test object, image compared to baseline

24
Q

What 3 checks are carried out on panoramic image receptors?

A

Visual inspection
Image uniformity
Image quality assessment

25
Q

How often should image display monitor condition be checked?

A

Monthly

26
Q

How often should image display monitor resolution and calibration be checked?

A

Every 3 months