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Evaluation of a novel CCD camera for dose reduction in digital radiography

Harris, EJ; Royle, GJ; Speller, RD; Spencer, S; Suske, W; (2000) Evaluation of a novel CCD camera for dose reduction in digital radiography. IEEE Nuclear Science Symposium and Medical Imaging Conference , 3

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Abstract

Work is currently underway to investigate the application Oca novel, low light level charge-coupled device to the field of digital radiography. The CCD has been developed by Marconi Applied Technologies. The image sensor in the camera is a frame transfer device with an image size of 576 x 288 pixels and a pixel size of 20 x 30 μm. The readout is standard 625-line video producing 25 frames per second at a pixel read out rate of 11.109MHz. Images are captured using a digital image acquisition card. The CCD has increased sensitivity at low? light levels and is able to operate at high levels of gain with the advantage of lower levels of noise in comparison with standard CCDs. For radjographic purposes a system based upon this device has the potential to operate at reduced irradiation levels. The overall aim of this work is to investigate dose savings in the field of fluoroscopy that may be achieved with this device. This paper presents an evaluation of the noise performance of the CCD. Some preliminary work to estimate dose levels in a simple CCD based imaging system is discussed.

Type:Article
Title:Evaluation of a novel CCD camera for dose reduction in digital radiography
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Medical Physics and Bioengineering

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