IEC 60601-2-64:2025

Overview

IEC 60601-2-64:2025 - "Medical electrical equipment - Part 2-64" - defines the basic safety and essential performance requirements for light ion beam medical electrical equipment used in human radiotherapy. This second edition (2025) replaces the 2014 edition and is a technical revision harmonized with recent updates to the IEC 60601‑1 series and IEC 62667. The standard applies to ME equipment and ME systems that, in normal use, deliver light-ion radiation beams with energy per nucleon from 10 MeV/n to 500 MeV/n, and it covers both manufacturer (type tests) and installation (site tests) responsibilities.

Key topics and technical requirements

• Scope and applicability
  • Covers devices intended for clinical radiotherapy operated by licensed or qualified personnel and maintained by qualified persons.
• Safety and essential performance
  • Requirements derived from IEC 60601‑1 general clauses, adapted for light ion beam hazards and system complexities.
• Type tests and site tests
  • Distinguishes tests performed by manufacturers (type tests) and those required at installation (site tests) with associated documentation and reporting.
• Programmable Electronic Subsystems (PESS)
  • Addresses automated control and display of operating parameters, including requirements for PESS used in clinical control and safety functions.
• Radiation protection and interlocks
  • Specifies limits and protective measures for unwanted or excessive radiation; Clause 201.10 defines conditions where interlocks must interrupt or terminate irradiation to preserve essential performance.
• Neutron considerations
  • Includes revised guidance on neutrons outside the treatment field (technical change from the previous edition).
• Labeling, documentation and usability
  • Identification, markings, movement designations (per IEC 61217 guidance), and instructions for use to support safe operation and clinical workflows.
• Quality assurance
  • Equipment is required to be subject to regular QA performance and calibration checks by qualified personnel.

Practical applications - who uses this standard

• Medical device manufacturers - to design, test, and certify light ion beam therapy systems for compliance.
• Clinical engineers and medical physicists - for commissioning, site testing, QA, and calibration protocols.
• Hospital procurement and radiation safety officers - to evaluate equipment safety and installation requirements.
• Regulators and notified bodies - for conformity assessment and approval of radiotherapy ME equipment.
• System integrators and installers - to perform and document required site tests and safety interlocks.

Related standards

• IEC 60601‑1:2005 and amendments (general requirements for basic safety and essential performance)
• IEC 62667:2017 (terminology and test/reporting formats for light ion beam equipment)
• IEC 61217 (guidance on equipment movements and marking)
• IEC 60601‑2‑68 (x‑ray image guidance - under development)

This standard is essential reading for stakeholders responsible for the safe design, installation, operation and regulatory compliance of light ion beam radiotherapy systems.