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JJF 1927-2021 English PDF

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JJF 1927-2021: Calibration Specification for Phantoms Used in Computed Radiography (CR) and Digital Radiography (DR)
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JJF 1927-2021English549 Add to Cart 5 days [Need to translate] Calibration Specification for Phantoms Used in Computed Radiography (CR) and Digital Radiography (DR) Valid JJF 1927-2021

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Standard similar to JJF 1927-2021

GB/T 3222.1   JJG 188   JJF 1396   JJF 2017   JJG 1179   JJF 1928   

Basic data

Standard ID JJF 1927-2021 (JJF1927-2021)
Description (Translated English) Calibration Specification for Phantoms Used in Computed Radiography (CR) and Digital Radiography (DR)
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A58
Word Count Estimation 25,268
Issuing agency(ies) State Administration for Market Regulation

JJF 1927-2021: Calibration Specification for Phantoms Used in Computed Radiography (CR) and Digital Radiography (DR)


---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.
(Medical CD/DR performance phantom reproduction) National Metrology Technical Specification of the People's Republic of China Specification for calibration of medical CR/DR performance phantoms Published on 2021-10-18 2022-04-18 Implementation Released by the State Administration for Market Regulation Medical CR/DR Performance Phantom Calibration specification Focal Point. National Technical Committee for Measurement of Ionizing Radiation Main drafting unit. China Institute of Testing Technology Zunyi City Product Quality Inspection and Testing Institute Participating in the drafting unit. China Institute of Metrology Chongqing Institute of Metrology and Quality Inspection Yibin Metrology and Testing Institute This specification is entrusted to the National Ionizing Radiation Measurement Technical Committee to be responsible for the interpretation The main drafters of this specification. Fan Jie (China Institute of Testing Technology) Zhang Conghua (China Institute of Testing Technology) Chen Fengjuan (Zunyi City Product Quality Inspection and Testing Institute) Lin Tao (China Institute of Testing Technology) Participating drafters. Li Xingdong (China Institute of Metrology) Song Hailong (Chongqing Institute of Metrology and Quality Inspection) Wang Kun (Yibin Metrology and Testing Institute)

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 Low contrast(2) 5.2 Attenuator Thickness(2) 5.3 Uniformity (2) 5.4 Test card identification error (2) 5.5 Line pair identification error(2) 6 Calibration Conditions(2) 6.1 Environmental conditions (2) 6.2 Measurement standards and other equipment(2) 7 Calibration items and calibration methods (3) 7.1 Low contrast(3) 7.2 Attenuator thickness(4) 7.3 Uniformity(4) 7.4 Test card identification error(4) 7.5 Pair identification error(5) 8 Expression of calibration results (5) 9 Recalibration interval(5) Appendix A Calibration Original Record (Recommended) Format Style (6) Appendix B Calibration Certificate Inner Page (Recommended) Format (9) Appendix C Measurement Uncertainty Evaluation Example(10) Appendix D Standard Test Specimen (19)

Introduction

This specification is based on JJF 1071-2010 "Rules for Compilation of National Metrology Calibration Specifications", JJF 1001-2011 "General Compiled with Measurement Terms and Definitions", JJF 1059.1-2012 "Measurement Uncertainty Evaluation and Representation". According to the actual situation of medical CR/DR performance phantom, the formulation of this calibration specification refers to JJG1078-2012 "Medical Digital Photography (CR, DR) System X-ray Radiation Source Verification Regulations", WS76-2020 "Medical X-ray Diagnostic Equipment Quality Control Testing Specification. This specification is published for the first time. Specification for calibration of medical CR/DR performance phantoms

1 Scope

This specification is applicable to medical CR/DR performance phantoms and multifunctional phantoms for medical CR/DR performance testing. The Quantitative section relates to the calibration of the module.

2 Reference documents

This specification references the following documents. JJF 1035 Ionizing Radiation Measurement Terms and Definitions JJG1078 Medical digital photography (CR, DR) system X-ray radiation source GB/T 23903 Radiographic Image Resolution Tester WS76-2020 Specification for quality control testing of medical X-ray diagnostic equipment 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

The terms and definitions defined in JJF 1035, JJG1078, GB/T 23903 and the following apply to this specification. 3.1 Terminology The minimum contrast of a specified shape and area that can be distinguished from a uniform low-density background, expressed as a percentage. 3.1.2 Uniformity The difference in the equivalent thickness of the phantom due to the phantom material and along the thickness difference, usually expressed as a percentage. 3.1.3 Line pair density densityoflinepair The total number of wire pairs per unit length in the wire pair width direction, in LP/mm. 3.2 Units of measurement Unit name of phantom geometric length. mm; symbol. mm.

4 Overview

The medical CR/DR performance phantom (hereinafter referred to as the phantom) is a systematic system for medical digital photography (CR, DR). device that can be detected. It has holes (or protrusions), rulers, uniform areas, etc. of a specific depth, which are used to detect medical data. Measurement of low-contrast resolution, spatial resolution, and consistency of light field and radiation field of digital photography (CR, DR) systems parameter. The phantom is generally composed of a low-contrast resolution module, a spatial resolution test plug-in, and a radiation field and light field consistency check. It consists of test card and uniformity test plug-in.

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