Life cycle of equipment

  • Created by: Emmatjies
  • Created on: 09-05-20 10:54

Life Cycle

  • Equipment specification
  • Installation
  • Critical examination
  • Acceptace testing
  • Commisioning
  • Clinical use
  • Routine testing
  • (clinical examination again then back to clinical use, if adjustments are made)
  • Replacement
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Equipment Specification

Identify essential critera and desirable elements of the equipment you need and put together a specification.

This then goes into a tendering process, where you shrtlist potential suppliers and these suppliers make site visits where equipment testing is done.

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Things to consider during installation process.

  • Where is it being delivered to?
  • Is everyone aware of the change?
  • Who is managing the project?
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Four stages of checking equipment

  • Critical examination - Before clinical use
  • Acceptance- Before clinical use
  • Commisioning- Before clinical use
  • Routine performance testing-  During Clinical use.


IRR 2017- States that critical examination should be done for all equipment. The installer is responsible for this, but is carried out by the RPA

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Critical examination

  • Emergency off button test
  • Automatic Exposure control
  • Warning signs
  • Door locks
  • All labels on equipment 
  • Couch movement and brakes are tested

Employers should not allow equipment to be used if it is unsatisfactory.

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Acceptance testing

This is done by medical physics

Record keeping is important.

This is normally carried out at the same time as commissioning

Baseline views determined for future QA testing.

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Also done by Medical physics. or company engineers.

Apps training

Performance testing

Standard operating procedures are written for the equipment

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Clinical Use

During clinical use the quality of service should be monitored.

Level A checks: ( 1 to 3 monthly)

  • LBD
  • Centring
  • Distance and scale checks
  • Output measurements

Level B checks: (yearly, as these tests are more analytical and require additional equipment.

  • Exposure time
  • Image uniformity
  • AEC
  • Radiation out put repeatability
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Quality assurance


  • systematic monitoring
  • Evaluation of various aspects of equipment
  • Ensures that standards of quality are met
  • Ensures the continued production of diagnostic images with appropriate image quality with the dose being as low as reasonably practiceable. 
  • Identifies faults or deterioration
  • Maintains image quality
  • Protects staff and pts
  • Keeps rad dose ALARP

Institue of physics and engineering in medicine (IPEM) Report 91

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