kerma

The fading correction and its corresponding calculation method were specially introduced in this paper for improving the accuracy of the environment cumulate kerma .

为了提高环境累积比释动能的测量准确度，特别介绍了环境剂量计的衰退修正及其计算方法。

Results The deviation of our air kerma calibration factors is - 0.5 % , and the deviation of our absorbed dose to water calibration factors is 0.4 % .

结果比释动能校准因子比对的偏差为-0.5%，水吸收剂量校准因子的比对偏差为0.4%。

Influence of Atmospheric Rainfall to the γ Radiation Kerma Rate in Surface Air

大气降雨对环境地表γ空气比释动能率测量影响规律的研究

Study on Certification of Air Kerma Rate of Body Source Standard for Environmental Ionizing Radiation

环境电离辐射体源标准空气比释动能率的确定

The problems of kerma factor calculations are discussed .

讨论了kerma因子的计算问题。

The Usage and Measure Chin of Air Kerma and Exposure

空气比释动能与照射量比较

The large nuclear temperature evaluation would violate conservation of energy , and may lead a negative neutron KERMA factor .

这就可能使评价核温度太高而导致平均次级中子能量（？）过大，破坏了能量守恒，而导致了负KERMA因子。

Objective To develop a well-type chamber air kerma strength of source for measurement and improve accuracy for source activity .

目的研制井型电离室，测量近距离源空气比释动能强度，与国际标准测量物理量接轨，改善源活度的测量精确度，促进国内近距离剂量学的发展。

Purpose To describe a method of calibration 192 Ir source for HDR brachytherapy by using air Kerma rate .

叙述以参考空气比释动能率校准192Ir高剂量率放射源的刻度方法及对结果的分析。

The relationship between the pixel values of images and X-ray tube voltage was analysed with a different situation of air kerma .

分析了不同比释动能状态下图像像素值与管电压间的变化关系。

The measurement and research on energy spectrum of standard radiation field in low-energy x-rays is a basis of the new state air kerma standard .

低能X射线空气比释动能标准辐射场能谱的测量与研究是新建国家空气比释动能标准的基础。

The relationship among energy deposit , energy imparted and linear energy are compared . A comparison between cema and kerma , absorbed dose is made .

比较了沉积能、授予能和线能之间的关系，及比转换能与比释功能和吸收剂量间的关系。

Results Surface doses were found to be decreased with increasing the X-ray tube voltage when air kerma was varied between 1.1 μ Gy / frame and 4.0 μ Gy / frame .

结果无论比释动能为1.1μGy/帧还是4.0μGy/帧，表面剂量随着X线管电压的增加而降低。

Surface doses were obtained from measured X-ray tube output data . The correlative changes were observed among X-ray tube voltage , surface dose , air kerma , and the detection threshold concentration of iodine .

观察X线管电压、表面剂量、比释动能以及碘探测阈浓度之间的变化关系。

The pixel value was kept relatively constant with air kerma of 4.0 μ Gy / frame and increased with air kerma of 1.1 μ Gy / frame when X-ray tube voltage was increased .

当比释动能为4.0μGy/帧时，随着管电压的增加，像素值保持相对的恒定，而当比释动能为1.1μGy/帧时，像素值却逐渐增加。

This paper expatiates main contents of technical research of the measuring standard apparatus of X 、γ - ray exposure in radiotherapeutic degree and introduced the high precision PTW-UNIDOS electrometer which can measure kerma directly .

本文阐述了X、γ射线照射量（治疗水平）标准装置技术研究的主要内容。