Comparison of the NIST and PTB Air-Kerma Standards for Low-Energy X-Rays.

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2009-12-01 Print Date: 2009-11-01 DOI:10.6028/jres.114.023

Michelle O'Brien, Ludwig Bueermann

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引用次数: 1

Abstract

A comparison has been made of the air-kerma standards for low-energy x rays at the National Institute of Standards and Technology (NIST) and the Physikalisch-Technische Bundesanstalt (PTB). The comparison involved a series of measurements at the PTB and the NIST using the air-kerma standards and two NIST reference-class transfer ionization chamber standards. Results are presented for the reference radiation beam qualities in the range from 25 kV to 50 kV for low energy x rays, including the techniques used for mammography dose traceability. The tungsten generated reference radiation qualities, between 25 kV and 50 kV used for this comparison, are new to NIST; therefore this comparison will serve as the preliminary comparison for NIST and a verification of the primary standard correction factors. The mammography comparison will repeat two previously unpublished comparisons between PTB and NIST. The results show the standards to be in reasonable agreement within the standard uncertainty of the comparison of about 0.4 %.

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低能x射线的NIST和PTB Air-Kerma标准比较。

本文对美国国家标准与技术研究所(NIST)和德国物理技术研究所(PTB)的低能x射线空气质量标准进行了比较。比较包括在PTB和NIST使用air-kerma标准和两个NIST参考级转移电离室标准进行的一系列测量。本文介绍了低能量x射线在25kv至50kv范围内的参考辐射束质量的结果，包括用于乳房x光检查剂量可追溯性的技术。用于该比较的钨产生的参考辐射质量在25千伏和50千伏之间，对NIST来说是新的;因此，这一比较将作为NIST的初步比较和主要标准校正因子的验证。乳房x光比较将重复之前未发表的PTB和NIST之间的两个比较。结果表明，在标准不确定度约为0.4%的范围内，两种标准具有较好的一致性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Research of the National Institute of Standards and Technology Engineering-General Engineering

自引率

33.30%

发文量

期刊介绍： The Journal of Research of the National Institute of Standards and Technology is the flagship publication of the National Institute of Standards and Technology. It has been published under various titles and forms since 1904, with its roots as Scientific Papers issued as the Bulletin of the Bureau of Standards. In 1928, the Scientific Papers were combined with Technologic Papers, which reported results of investigations of material and methods of testing. This new publication was titled the Bureau of Standards Journal of Research. The Journal of Research of NIST reports NIST research and development in metrology and related fields of physical science, engineering, applied mathematics, statistics, biotechnology, information technology.