Assessment of image quality in x-ray radiography imaging using a small plasma focus device

被引：6
|
作者：
Kanani, A. [1 ]
Shirani, B. [1 ]
Jabbari, I. [1 ]
Mokhtari, J. [2 ]
机构：
[1] Univ Isfahan, Fac Adv Sci & Technol, Esfahan, Iran
[2] Shiraz Univ, Dept Nucl Engn, Shiraz, Iran
来源：
RADIATION PHYSICS AND CHEMISTRY | 2014年 / 101卷
关键词：
Plasma focus; Radiography; Contrast; Line spread function; Modulation transfer function; Cut off frequency;
D O I：
10.1016/j.radphyschem.2014.04.010
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This paper offers a comprehensive investigation of image quality parameters for a small plasma focus as a pulsed hard x-ray source for radiography applications. A set of images were captured from some metal objects and electronic circuits using a low energy plasma focus at different voltages of capacitor bank and different pressures of argon gas. The x-ray source focal spot of this device was obtained to be about 0.6 mm using the penumbra imaging method. The image quality was studied by several parameters such as image contrast, line spread function (LSF) and modulation transfer function (MTF). Results showed that the contrast changes by variations in gas pressure. The best contrast was obtained at a pressure of 0.5 mbar and 3.75 kJ stored energy. The results of x-ray dose from the device showed that about 0.6 mGy is sufficient to obtain acceptable images on the film. The measurements of LSF and MTF parameters were carried out by means of a thin stainless steel wire 0.8 mm in diameter and the cut-off frequency was obtained to be about 1.5 cycles/mm. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：59 / 65
页数：7
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