237. Developement of Image Intensifier Brightness Control Instrument
نویسندگان
چکیده
منابع مشابه
Introduction to Image Intensifier Tubes
An image ultraviolet, visible light, or near infrared is projected onto the transparent window of the vacuum tube as shown in Fig. 1. The vacuum side of this window carries a sensitive layer called the photocathode. Light radiation causes the emission of electrons from the photocathode into the vacuum which are then accelerated by an applied DC voltage towards a luminescent screen (phosphor scr...
متن کاملSpread Funci ' Ion Estimation of Image Intensifier Tub
Real-time radiography systems employing an image intensifier tube have poor resolution (2 to 4Ip/mm) compared to their film-based counterparts (10 to 20 lp/mm). Phosphor bloom, especially in the output conversion phosphor [1], is the principle cause of reduced resolution. Other systems achieve higher resolution but at the expense of additional hardware complexity [2] or use of expensive materia...
متن کاملThe image intensifier as an operating table: a dangerous practice.
The radiolucent surface plate of the C-arm image intensifier is often used as an operating table, particularly in surgery on the hand. The advantages include easier positioning and clearer quality of the image. We wish to draw attention to the dangers of this practice. Examination of our image intensifier has shown three penetrating holes and a number of scratch marks on the surface plate which...
متن کاملConcept for Image Intensifier with CMOS Imager Output Interface
A concept is described for the detection and location of transient objects, in which a “pixel-binary” CMOS imager is used to give a very high effective frame rate for the imager. The sensitivity to incoming photons is enhanced by the use of an image intensifier in front of the imager. For faint signals and a high enough frame rate, a single “image” typically contains only a few photon or noise ...
متن کاملCompputerized Station for Semi-automated Testing Image Intensifier Tubes
Testing of image intensifier tubes is still done using mostly manual methods due to a series of both technical and legal problems with test automation. Computerized stations for semi-automated testing of IITs are considered as novelty and are under continuous improvements. This paper presents a novel test station that enables semiautomated measurement of image intensifier tubes. Wide test capab...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 1994
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00003326038