New IQI for digital radiography

Masako Mori, Toshibumi Kashiwa, Yoshimitsu Aoki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


Radiographic Test (RT) has been widely used in industries to detect inner defects of welded structures or any other significant components. Especially in the nuclear industry, film radiography is the dominant and standardized procedure in performing radiographic testing. Lately emphasis is on digital radiography. One of the most serious concerns for digitization is the lack of image resolution standardizing device like resolution gauge which would determine imaging parameters such as modular transfer function (MTF). This paper proposes line pair type image quality indicator (IQI) corresponding to the current IQIs for both hole and wire type. The advantage of this IQI is to enable easier calibration of testing conditions and quantification of digital RT image quality with required MTF that should be clearly defined in the examination procedures. Furthermore, to acquire "resolution-ensured" digital image of existing RT films, we developed line pair type standardization film. Prototypes of line pair type IQI and line pair type standardization film are currently in the validation study and trial implementing process. These results are also reported in this paper.

Original languageEnglish
Title of host publication2007 Proceedings of the ASME Pressure Vessels and Piping Conference - Codes and Standards
Number of pages4
Publication statusPublished - 2008 May 19
Externally publishedYes
Event2007 ASME Pressure Vessels and Piping Conference, PVP 2007 - San Antonio, TX, United States
Duration: 2007 Jul 222007 Jul 26

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
ISSN (Print)0277-027X


Other2007 ASME Pressure Vessels and Piping Conference, PVP 2007
Country/TerritoryUnited States
CitySan Antonio, TX

ASJC Scopus subject areas

  • Mechanical Engineering


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