Radiography Flashcards

1
Q

What can affect the quality of a radiograph?

A

How the image was taken.
Image receptors.
Exposure or processing faults.

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2
Q

Why may the image be too dark?

A

Over exposed.
Overdeveloped.
Fogging.

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3
Q

Why may the image be too pale?

A

Underexposed.
Underdeveloped.
Film was back to front.

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4
Q

What is the legislation surrounding radiation?

A

IRR
IR(ME)R

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5
Q

Who does IRR protect?

A

The place of work and staff.

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6
Q

What are the legal requirements of IRR?

A

Notify HSE of equipment.
Risk assessment
Maintenance log
Contingency plan
Radiation protection advisor.
Radiation protection supervisor.
Adequate training.
QA programme
Controlled areas

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7
Q

What is a RPA?

A

Advises on compliance with IRR, usually a physicist.

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8
Q

What is a RPS?

A

Arranges the local rules, a dentist.

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9
Q

What does IRMER cover?

A

Protection of patients.

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10
Q

What are the legal requirements of IRMER?

A

Duties of the referrer, practitioner, operator and employer.
Appointment of a RPA.
Justification of exposures.
Optimisation.
Establish diagnostic reference levels.
Record an evaluation of every radiograph.

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11
Q

What are the duties of the referrer?

A

A registered health care professional responsible for justification.

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12
Q

What are the duties of the practitioner?

A

To be suitably trained, ensures justification is appropriate.

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13
Q

What is the duty of the operator?

A

Responsible for the correct exposure.

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14
Q

What is the duty of the employer?

A

Legal responsibility for x-ray installation.

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15
Q

What is included in the radiation protection file?

A

Name of RPS.
The controlled area.
Working instructions
Risk assessment
Contingency arrangements
Dose investigations level.
Name of legal person.
RPA details.
Arrangements for personal dosimetry.
Arrangements for pregnant staff

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16
Q

When should bitewings be taken?

A

High caries risk - 6 months.
Moderate caries risk - 12 months.
Low caries risk - 2 years (12-18 months if primary)

17
Q

What is optimisation?

A

The process of balancing the diagnostic quality of a radiograph against the dose received by the patient.

18
Q

How is optimisation achieved?

A

Equipment optimisation
Good technique
Lead protection
Quality assurance.

19
Q

What should the equipment voltage operate between?

A

60-70kV

20
Q
A