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Titolo:
THE DEVELOPMENT OF A NEW DIRECT DIGITAL EXTRAORAL RADIOGRAPHIC SYSTEMPROTOTYPE USING A THIN-FILM-TRANSISTOR PANEL
Autore:
SAKURAI T; MATSUKI T; NAKAMURA K; KASHIMA I; LEE DL; CHEUNG LK; JEROMIN LS;
Indirizzi:
KANAGAWA DENT COLL,DEPT ORAL & MAXILLOFACIAL RADIOL,82 INAOKA YOKOSUKA KANAGAWA 238 JAPAN
Titolo Testata:
Dento-maxillo-facial radiology
fascicolo: 3, volume: 27, anno: 1998,
pagine: 172 - 177
SICI:
0250-832X(1998)27:3<172:TDOAND>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
SENS-A-RAY; STORAGE PHOSPHOR SYSTEMS; CHARGE-COUPLED-DEVICE; IMAGE QUALITY; INTRAORAL RADIOGRAPHY; APPROXIMAL CARIES; VISUALIX VIXA; RADIOVISIOGRAPHY; ACQUISITION; DETECTOR;
Keywords:
IMAGE PROCESSING, COMPUTER-ASSISTED; RADIOGRAPHIC IMAGE ENHANCEMENT; RADIOGRAPHY, DENTAL; TECHNOLOGY, RADIOLOGIC;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
26
Recensione:
Indirizzi per estratti:
Citazione:
T. Sakurai et al., "THE DEVELOPMENT OF A NEW DIRECT DIGITAL EXTRAORAL RADIOGRAPHIC SYSTEMPROTOTYPE USING A THIN-FILM-TRANSISTOR PANEL", Dento-maxillo-facial radiology, 27(3), 1998, pp. 172-177

Abstract

Objective: To develop a new method of direct digital image acquisition for extra-oral radiography. Methods: A selenium detector was combined with a thin-film transistor sensor and integrated with current technology for computed radiography in a system named Direct Radiography (DR). The effective image area of the prototype is 178 mm x 213.5 mm, and consists of a 1280 x 1536 pixel matrix with a pixel pitch of 139 mu m x 139 mu m. The electrical characteristics were evaluated and image quality was tested with a dried human mandible and half-skull phantom. The resultant images were subjectively reviewed by seven oral and maxillofacial radiologists. Results: The prototype had a signal-to-noise ratio of 400 : 1 when the exposure was 250 x 10(-8) C/Kg. Spatial resolution was equal to the Nyquist frequency of 3.55 cycles/mm. The images of the phantoms were considered to be of equivalent quality to conventional screen-film images and demonstrated the normal anatomical structures used for clinical evaluation. Three to four images per minute were generated with this system. Conclusion: The DR system has an X-raysensitivity comparable with a 400-speed film-screen system and appears suitable for clinical radiography. Further evaluation is therefore planned.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 22:33:17