YY/T 0894-2013
Medical electrical equipment.Dosimetric instruments as used in brachtherapy.Instruments based on well-type ionization chambers (English Version)

Standard No.

YY/T 0894-2013

Language

Chinese, Available in English version

Release Date

2013

Published By

Professional Standard - Medicine

Latest

YY/T 0894-2013

Scope

This standard specifies the performance and certain structural requirements for well-type ionization chambers and associated measuring components (see definition in Chapter 3) used to determine a quantity, e.g. for use at close range after appropriate calibration of a given type of source. The air kerma rate intensity or reference air kerma rate in the radiation field of radiotherapy photons, or the water absorbed dose at a certain depth in the photon and beta radiation fields. This standard covers quantitative methods suitable for brachytherapy sources. This quantity may be the air kerma intensity or a reference air kerma rate at 1 m from the source, or the water absorbed dose at a certain depth (e.g. 2 mm or 5 mm). Measurement of these quantities can be accomplished with a variety of well-type ionization chambers or systems currently available. This standard applies to products whose intended use is low dose rate, high dose rate, intravascular brachytherapy measurement, including photons and beta rays. This standard does not apply to instruments used in nuclear medicine. The application of this standard is limited to instruments using well-type ionization chambers as detectors. The purpose of the instrument is to measure the radioactive output of an intracavity (inserted into a body cavity) or interstitial (inserted into human tissue) sealed source. The purpose of this standard is: a) to establish requirements for satisfactory performance of well-type ionization chamber systems, and b) to provide a standardized method for determining compliance with that performance. This standard does not address the safety features of well ionization chamber systems. The well-type ionization chamber systems covered by this standard are not intended for use in patient environments. The electrical safety of well ionization chamber systems is specified in IEC 61010-1. Electrometer measurement systems see IEC 60731.

YY/T 0894-2013 Referenced Document

• GB/T 19629-2005 Medical Electrical equipment-Dosimeters with ionization chambers and/or semi-conductors as used in X-ray diagnostic imaging
• GB/T 20012-2005 Medical electrical equipment.Dose area product meters
• GB/T 2900.81-2008 Electrotechnical terminology.Nuclear instrumentation Physical phenomena and basic conecpts
• IEC 60417 
• IEC 61187 Electrical and electronic measuring equipment; documentation

YY/T 0894-2013 history

• 2013 YY/T 0894-2013 Medical electrical equipment.Dosimetric instruments as used in brachtherapy.Instruments based on well-type ionization chambers