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Development of a 2,048 x 2,048-pixel image intensifier-TV digital radiography system. Basic imaging properties and
M Takahashi1, S Ueno, T Tsuchigame
1Department of Radiology, Kumamoto University School of Medicine, Japan.
Rationale And Objectives:
A 2,048 x 2,048-pixel matrix image intensifier (II)-TV digital radiography system has been developed. Potential clinical applications of this new II-TV system were investigated.
Methods:
Basic imaging properties were assessed with clinical applications to gastrointestinal (GI) tract and chest examinations.
Results:
Basic imaging properties showed improvement of modulation transfer functions (MTFs) from the 1,024 x 1,024- to the 2,048 x 2,048-pixel matrix and approximated the screen-film system at low spatial frequencies. Receiver operating characteristic (ROC) curves of simulated linear shadows improved similarly. Clinical applications showed that the image quality of the 2,048 x 2,048-pixel matrix was comparable with that of the screen-film system for upper GI and chest radiography, but the image quality of the screen-film system was better for the lower GI tract.
Conclusions:
The authors' II-TV digital radiography system is clinically applicable to gastrointestinal and chest examinations.