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TAKAHASHI MUTSUMASA MD; UENO, SUKEYOSHI MD; TSUCHIGAME, TADATOSHI MD; HIGASHIDA, YOSHIHARU RT; HIRATA, YUKINORI RT; MORIBE, NOBUYUKI RT; TAKADA, TAKAO RT; KAMIYA, MASAMI PHD; KOIKE, KOICHI BSc
Investigative Radiology: November 1992
Original Investigations: PDF Only
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RATIONALE AND OBJECTIVES. A 2,048 x 2,048-pixel matrix image intensifler (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.

© Lippincott-Raven Publishers.