Title :
The application of TDI-CCD in dental panoramic X-ray radiography
Author :
Jianrong Lu ; Youjun Liu ; Rongli Liu ; Ran Vu
Author_Institution :
Coll. of Life Sci. & Bioeng., Beijing Univ. of Technol., Beijing, China
Abstract :
In this paper, TDI-CCD was applied to dental X-ray panoramic radiography, in order to improve the image resolution and realize the direct digital radiography. The drive pulses o f TDI-CCD are generated by CPLD, causing storage and shift o f photoinduced charge. TDI-CCD can operate normally under the action o f drive pulses. Aiming at reducing the noise of the CCD output signal, signal processing circuit was designed. And the noise can be greatly restrained through capacitance coupling, filtering, clamping, sampling and holding circuits. The processed CCD signal is convenient for A/D conversion.
Keywords :
analogue-digital conversion; charge-coupled device circuits; dentistry; diagnostic radiography; filtering theory; image denoising; image processing equipment; image resolution; medical image processing; A-D conversion; CCD output signal noise reduction; CPLD; TDI-CCD; capacitance coupling circuits; clamping circuits; dental panoramic x-ray radiography; direct digital radiography; drive pulses; filtering circuits; holding circuits; image resolution improvement; medical imaging; photoinduced charge; sampling circuits; signal processing circuit design; TDI-CCD; dental; radiography;
Conference_Titel :
Computer Science and Automation Engineering (CSAE), 2012 IEEE International Conference on
Conference_Location :
Zhangjiajie
Print_ISBN :
978-1-4673-0088-9
DOI :
10.1109/CSAE.2012.6272886
