Unit 306 The Safe Use of Ionising Radiation to Produce Quality Radiographic Images Assessment Brief 2026
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| University | City & Guilds |
| Subject | Unit 306 The Safe Use of Ionising Radiation to Produce Quality Radiographic Images |
City & Guilds Level 3 Extended Diploma in Dental Nursing
Unit 306 Assignment Brief
| Unit level: | Level 3 |
| GLH: | 32 |
| Unit aim: | The aim of the unit is to enable the learner to develop the knowledge and skills needed to carry out their duties relating to dental radiography. Learners will understand current legislation relating to radiography in addition to the principles and techniques of taking, processing, storing and quality assuring radiographs. Learners will also demonstrate the processing method used in their clinical environment. |
Learning Outcome
The learner will:
1. Understand the regulations and hazards associated with ionising radiation.
Assessment Criteria
The learner can:
1.1 Describe the legal requirements for ionising radiation within a dental setting.
1.2 Summarise the risks associated with ionising radiation.
1.3 State the purpose of the controlled area.
1.4 State the importance of an isolation switch.
1.5 State the purpose of lead foil in a traditional radiographic film.
1.6 State the purpose of an intensifying screen in an extra-oral cassette.
Range
(AC1.1) Legal requirements
a) The current Ionising Radiation Regulations
b) The current Ionising Radiation (Medical Exposure) Regulations
c) Local rules
d) Radiation protection file
(AC1.2) Risks
a) Primary beam
b) Scatter radiation
c) Absorption by the patient
d) Equipment failure
e) Accidental exposure (to patient or self)
Learning Outcome
The learner will:
2. Understand the different radiographic images and their diagnostic value.
Assessment Criteria
The learner can:
2.1 Explain the diagnostic value of intra-oral radiographic images.
2.2 Explain the diagnostic value of extra-oral radiographic images.
2.3 Evaluate the advantages of using digital radiography in the dental setting.
Range
(AC2.1) Intra-oral radiographic images
a) Bitewing
b) Periapical
(AC2.2) Extra-oral radiographic images
a) Dental pantomograph (DPT) / orthopantomograph (OPG) / panoral
Learning Outcome
The learner will:
3. Understand the processing methods and faults that can occur when processing radiographs.
Assessment Criteria
The learner can:
3.1 Explain methods for processing radiographs.
3.2 Describe the reasons for faults visible on radiographic images.
Range
(AC3.1) Methods
a) automatic film processing
b) digital
i. direct
ii. indirect
(AC3.2) Reasons
a) operator error
b) processing error
c) patient error and accessories (eg. dentures, glasses)
d) equipment error
e) storage of materials
Learning Outcome
The learner will:
4. Understand the importance of quality assurance in dental radiography.
Assessment Criteria
The learner can:
4.1 Describe the quality control systems used in dental radiography.
4.2 Explain how quality control systems are carried out to comply with the principle of ALARP (radiation dose to be As Low As Reasonably Practicable).
4.3 Explain the methods of mounting radiographic images.
Range
(AC4.2) Quality control systems
a) Radiographic image grading process
b) Step-wedge test
c) Quality assurance of direct and indirect digital X-ray sensors/plates
d) IRMER operator requirements
Learning Outcome
The learner will:
5. Be able to provide support and resources for taking radiographic images.
Assessment Criteria
The learner can:
5.1 Maintain safe working practices throughout radiographic imaging procedures.
5.2 Provide the correct resources required by the operator for taking radiographic images.
5.3 Decontaminate radiographic equipment after use.
Range
(AC5.2) Resources
a) Holder
b) Sensor or phosphor plate or film
Learning Outcome
The learner will:
6. Be able to process a radiographic image.
Assessment Criteria
The learner can:
6.1 Process a radiographic image.
6.2 Maintain the quality of the radiographic image during processing.
6.3 Store the radiographic image permanently and securely.
Unit 306 The safe use of ionising radiation to produce quality radiographic images Supporting Information
Evidence Requirements
Learning Outcomes 1, 2, 3 and 4 – Centres may use professional discussion, assessor devised questions, expert witness testimonies, outcomes of research-based activities, assignments and reflective accounts.
Learning Outcomes 5 and 6 – minimum of one observation. This must be carried out by the assessor. Simulation is not allowed.
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