Investigation of the effect of metallic screens on image quality in gamma computed radiography

Malaysia International NDT Conference and Exhibition 2018

D'Ademo, N.^1

DURR NDT GmbH and Co. KG, Höpfigheimer Straße 22, Bietigheim-Bissingen, Germany^1

关键词: Computed radiography;    Intensification effects;    Iridium-192;    Metallic screen;    Radiation source;    Scattered radiations;    Spatial resolution;    X-ray energies;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/554/1/012006/pdf
DOI  :  10.1088/1757-899X/554/1/012006

来源: IOP

【 摘 要 】

The role of metallic screens in computed radiography for controlling scattered radiation is very well-known. Likewise, the intensification effects of certain lead screen thicknesses with higher X-ray energies, such as those produced by gamma isotopes is also a topic that has been recently investigated in literature. This paper extends this topic further and quantitatively investigates how image quality in terms of signal-to-noise ratio (SNR) and basic spatial resolution (SRb) is influenced by metallic screens when Iridium-192 is used as the radiation source. The result data is then used to make recommendations to achieve optimum image quality when using Iridium-192.