摘要:
Automatic exposure control (125) for an X-ray imaging panel (118) is obtained by using parasitic coupling (136,138) between radiation sensor (130) in the array of the panel and corresponding data lines (134,140). The capacitive coupling allows the same sensing or detection system used for imaging to also be used to shut off X-ray when a desired exposure level had been reached.
摘要:
A portable and preferably hand-held X-ray generator (10, 260, 310) for use in intraoral and other X-ray applications, and a new process of dental image acquisition which utilizes a novel receptor holder (24, 230, 330) physically linked to the lightweight, portable generator, and a unique, articulating arm (104, 504) and cradle (108) which allows one generator to be used in multiple operatories. The system's generator has a reduced X-ray output and much smaller focal spot area than conventional dental X-ray generators, which reduces the X-ray output and the overall patient X-ray burden. The smaller focal spot also allows for improved resolution in the final image.
摘要:
A portable and preferably hand-held X-ray generator (10) for use in intraoral and other X-ray applications, and a new process of dental image acquisition which utilizes a novel receptor holder (24) physically linked to the lightweight, portable generator (10), and a unique, articulating arm (104) and cradle (108) which allows one generator (10) to be used in multiple operatories. The system's generator has a reduced X-ray output and much smaller focal spot area than conventional dental X-ray generators, which reduces the X-ray output and the overall patient X-ray burden. The smaller focal spot also allows for improved resolution in the final image.
摘要:
Die Erfindung bezieht sich auf einen Computertomographen mit einer Strahlenmeßanordnung, die eine Strahlenquelle (10) und einen Strahlenempfänger (14) enthält, der aus einer Reihe einzelner Detektoren besteht. Die Strahlendosis für jede Projektion wird so eingestellt, daß an den Detektoren des Strahlenempfängers (14) ein minimales Signal erhalten wird, das einem gewünschten minimalen Signal-Rausch-Verhältnis entspricht. Auf diese Weise wird ein Bild von akzeptabler Qualität mit einer minimalen Strahlenbelastung des Patienten erzeugt (Fig.3).