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A 3D X-ray microtomographic system with CMOS image sensor

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5 Author(s)
Lee, S.W. ; Dept. of Nucl. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea ; Kim, H.K. ; Cho, G. ; Shin, Y.H.
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High resolution and three dimensional X-ray imaging is becoming more and more popular nowadays. An X-ray microtomographic system with CMOS image sensor has been developed. We have developed a novel area X-ray detector with cost-effective CMOS image sensor. The sensing area of the detector is 55 mm×55 mm and the light from the phosphor screen is collected to the CMOS image sensor by a carefully designed optical system. 6 lenses are assembled to reduce the radiation damage effect and increase the resolution and sensitivity. Microfocus X-ray tube which can reach up to 5 μm of focal spot size and microprecision motor system which can move in x-y-z direction for both alignment and magnification and rotate the,object have been adopted. Conventional 3D cone-beam Feldkamp reconstruction algorithm was used and a human cancellous bone has been imaged with this system. Currently, the resolution of this system is about 40 μm but the application in microtomography seems very promising using this CMOS X-ray detector

Published in:

Nuclear Science Symposium Conference Record, 2000 IEEE  (Volume:3 )

Date of Conference:

2000

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