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JJF 1928-2021 English PDF

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JJF 1928-2021: Calibration Specification for Beam Quality Inspection Instruments of Radiation Therapy
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1928-2021	English	379	Add to Cart	4 days [Need to translate]	Calibration Specification for Beam Quality Inspection Instruments of Radiation Therapy	Valid	JJF 1928-2021

PDF similar to JJF 1928-2021

Standard similar to JJF 1928-2021

GB/T 3222.1 JJG 188 JJF 1396 JJF 2017 JJG 1179 JJF 1927

Basic data

Standard ID	JJF 1928-2021 (JJF1928-2021)
Description (Translated English)	Calibration Specification for Beam Quality Inspection Instruments of Radiation Therapy
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A58
Word Count Estimation	17,113
Issuing agency(ies)	State Administration for Market Regulation

JJF 1928-2021: Calibration Specification for Beam Quality Inspection Instruments of Radiation Therapy

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Appearance of Radiotherapy Beam Inspection Apparatus) National Metrology Technical Specification of the People's Republic of China Radiotherapy beam quality checker Calibration specification Published on 2021-10-18 2022-04-18 Implementation Released by the State Administration for Market Regulation Radiotherapy beam quality checker Calibration specification Focal Point. National Technical Committee for Measurement of Ionizing Radiation Main drafting unit. China Institute of Testing Technology Sichuan Cancer Hospital Guangxi Zhuang Autonomous Region Metrology and Testing Research Institute Participating in the drafting unit. Dalian Metrology, Inspection and Testing Research Institute Co., Ltd. Anyang Quality and Technical Supervision, Inspection and Testing Center This specification is entrusted to the National Ionizing Radiation Measurement Technical Committee to be responsible for the interpretation The main drafters of this specification. Gong Lan (China Institute of Testing Technology) Kang Shengwei (Sichuan Cancer Hospital) Chen Shengbiao (Guangxi Zhuang Autonomous Region Metrology and Testing Research Institute) Participating drafters. Shi Ming (Dalian Metrology, Inspection and Testing Research Institute Co., Ltd.) Zhou Yuanyuan (China Institute of Testing Technology) Zhang Hui (Anyang Quality and Technical Supervision, Inspection and Testing Center) Liu Cao (China Institute of Testing Technology)

content

Introduction (Ⅱ) 1 Scope(1) 2 References (1) 3 Terms and units of measurement(1) 4 Overview(1) 5 Metrology Characteristics(2) 5.1 Calibration factor(2) 5.2 Repeatability(2) 5.3 Indication nonlinearity (2) 6 Calibration Conditions(2) 6.1 Environmental conditions (2) 6.2 Measurement standards and other equipment(2) 7 Calibration items and calibration methods (2) 7.1 Calibration factor(2) 7.2 Repeatability(3) 7.3 Indication nonlinearity (3) 8 Expression of calibration results (4) 9 Recalibration interval(4) Appendix A Calibration Original Record (Recommended) Format Style (5) Appendix B Calibration Certificate Inner Page (Recommended) Format (7) Appendix C Example of Uncertainty Assessment of Dose Calibration Factor(8)

Introduction

JJF 1071-2010 "Rules for the Compilation of National Metrology Calibration Standards", JJF 1001-2011 "General Metrology Terms and Definition" and JJF 1059.1-2012 "Measurement Uncertainty Evaluation and Representation" together constitute support for the formulation of this specification The basic series of specifications. In the formulation of this specification, reference is made to JJG589-2008 "Medical Electron Accelerator Radiation Sources", JJG912-2010 "Therapeutic Level Ionization Chamber Dosimeter", JJG2044-2019 "Gamma-ray air kerma measurement Apparatus Verification System Table", GB 15213-2016 "Medical Electron Accelerator Performance and Test Methods", Basic requirements and methods for documents such as IEC 60976.2007 Performance of Medical Electron Accelerators for Medical Electrical Equipment. This specification is published for the first time. Radiotherapy beam quality checker Calibration specification

1 Scope

This specification applies to the beam quality inspection of 60Co gamma rays, accelerator X-rays and electron rays used in radiotherapy It is not suitable for 2D and 3D dosimetry systems for verification of radiation treatment plans.

2 Reference documents

This specification references the following documents. JJG589 Medical electron accelerator radiation source JJG912 Therapeutic level ionization chamber dosimeter JJF 1035 Ionizing Radiation Measurement Terms and Definitions GB 15213 Medical Electron Accelerator Performance and Test Methods GB/T 19046 Procedures for acceptance test and periodic inspection of medical electron accelerators For dated references, only the dated version applies to this specification; for undated references The latest version (including all amendments) applies to this specification.

3 Terminology and units of measurement

3.1 Terminology The terms and definitions defined in JJF 1001, JJF 1035, GB 15213 and the following apply to this specification. Along the ray axis, the distance from the radiation source surface to the irradiated surface, also known as the source skin distance. 3.1.2 Irradiation field fieldofbeam The irradiation surface of a radiation beam in a plane perpendicular to its axis. For X-radiation, it is the distance measured from the front surface of the target along the axis of the radiation beam to the isocenter; for non-isocentric equipment, then is the distance to the specified plane. Electron beam radiation is the distance measured from the electron radiation window along the beam axis to the end of the beam limiter or to a specified plane. 3.2 Units of measurement Absorbed dose unit name. Gray [Ray]; Symbol. Gy.

4 Overview

Radiotherapy beam quality checker (hereinafter referred to as checker), mainly composed of ionizing radiation detector, signal processing Unit, data acquisition unit, data analysis software, etc., used for electron linear accelerator or cobalt therapy machine in the development of

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