Radiology and Radiation Protection

Module 4: Justification, selection and quality assurance of radiography equipment

Radiation Module 4 - apolline Training online course for dental professionals

“Concise, easy, practical and educational”

This online, verifiable CPD course is aimed at dental professionals looking to fulfil their GDC requirements in Radiology and Radiation Protection. Meets Ionising Radiation Regulations 2017 (IRR17) and Ionising Radiation (Medical Exposure) Regulations 2017 (IRMER17). 

Module 4 considers selection criteria and justification of dental radiographs, including requirements for reporting, image quality analysis and clinical record-keeping. There is an explanation of the use of diagnostic reference levels (DRLs) and details of how to meet the requirements for a comprehensive quality assurance programme in practice.

This course aims to provide dental professionals with the knowledge and understanding of radiation justification and selection criteria when taking radiographs in dental practice. You will also gain knowledge for a robust and comprehensive quality assurance programme so that you can implement this as part of your safe working practices.

The objective of this e-learning course is that upon completion, the learner will:

  • Be aware of selection criteria in the justification and authorisation of radiographs.
  • Appreciate the requirements for clinical evaluation and record keeping.
  • Be familiar with diagnostic reference levels.
  • Understand the implementation of a robust and comprehensive Quality Assurance programme.

C, D

Ionising Radiation (Medical Exposure) Regulations 2017: guidance – GOV.UK (

Health and Safety: Ionising Radiation (

Working with ionising radiation: notify, register or get consent (


Recommended reading

Guidance Notes for Dental Practitioners on the Safe Use of X-ray Equipment (2020)

College of General Dentistry – formerly the Faculty of General Dental Practice (UK) 


Selection Criteria for Dental Radiography (2013 updated 2018)

College of General Dentistry – formerly the Faculty of General Dental Practice (UK) 


Both these publications are available to download free of charge from the College of General Dentistry website.


Jim Kentley

Jim qualified in dentistry in the Dark Ages of 1975 (literally for those who remember the strikes and power cuts from that era). He spent 40 years as a general dental practitioner in York along with a part-time role as a practice advisor with Denplan from 1993 to 2018. Always keen on postgraduate education he was one of the first to gain the FGDP(UK) certificates in Management and Leadership, Practice Appraisal, and Mentoring. Now retired from practice he enjoys walking and cycling in the beautiful North Yorkshire countryside, and indulging his love of good food and wines!

GIF Annual CPD Membership

This training is suitable for:

  • IRMER practitioners and operators.
  • Dental care professionals acting as an operator taking radiographs with a diploma or certificate in radiography.
  • Undergraduate dentist and dental care professionals looking for initial IRMER training.
  • GDC registrants looking to gain their 5 hours of recommended training.

This module is part of our Radiology and Radiation Protection five course series. We recommend that you complete all five courses (in order). Pay less for the series by purchasing the course bundle. 

Radiology and Radiation online course logo badge Module 1

Radiology and Radiation online course logo badge Module 2

Radiology and Radiation online course logo badge Module 3

Radiology and Radiation online course logo badge Module 4

Radiology and Radiation online course logo badge Module 5

Course Curriculum

  • Justification
    5 minutes
  • Authorisation
    5 minutes
  • Selection Criteria Guidelines
    5 minutes
  • Radiographs for caries diagnosis
    5 minutes
  • Frequency of radiographs – children
    5 minutes
  • Frequency of radiographs – adults
    5 minutes
  • Radiographs in periodontal assessment
    5 minutes
  • Radiographs in endodontics
    5 minutes
  • Radiographs for implant treatment
    5 minutes
  • Selection criteria for panoramic radiography
    5 minutes
  • Summary A
    5 minutes
  • Diagnostic reference levels (DRLs)
    5 minutes
  • The clinical record
    5 minutes
  • Quality assurance (QA)
    5 minutes
  • Key principles of a quality assurance programme
    5 minutes
  • Quality assurance – employer’s procedures
    5 minutes
  • Quality assurance – training
    5 minutes
  • Quality assurance – x-ray equipment
    5 minutes
  • Checks on CBCT equipment
    5 minutes
  • Non-digital films and processing
    5 minutes
  • Digital sensors, processing and viewing equipment
    5 minutes
  • Display screens
    5 minutes
  • Image quality analysis
    5 minutes
  • Audits of Quality Assurance programme
    5 minutes
  • Summary B
    5 minutes
  • Pre-Question Advice Preview
    1 minutes
  • Radiology and Radiation Protection Module 4
    10 questions
  • Course Feedback and Reflective Learning
    5 minutes

Your course includes

Up-to-date information

Our course material is both current and relevant; verified by leaders in the dental industry.

Various media

We use a combination of text, imagery, videos and presentations to help you get the most out of this course.

Course downloads

This course features documents for you to download and use in your dental practice.

Post-course feedback

Upon completion of the course you are required to complete a short feedback survey.

Frequently asked Questions

When does the course start and finish?

The course begins when you are ready. Although the course duration is 90 minutes, you can work at your own pace, and your progress is saved automatically.

How long do I have access to the course?

After you have successfully enrolled on the course, there is no limit on when you must complete the course by. 

Does the course have a test?

Yes. There is a short assessment at the end of the course. You must achieve 80% or more to pass the course. If you do not pass, you have the opportunity to review the content and re-take the assessment when you are ready.

Does the course offer a certificate upon completion?

Yes. Upon successful completion of the course, you will be awarded a personalised certificate. This is saved to your personal dashboard. You can download and print this certificate when you require it. In addition, you are also credited with a digital badge that will feature in your personal dashboard.

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