Design and Validation of Synchronous Exposure Control System of Dental Cone Beam CT_Journal of Biomedical Engineering

Authors：

WANGHaowen , LUOYibin , XUYuan , ZHANGGuangpeng ,  ZHOULinghong

School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China;

Corresponding author：

ZHOULinghong, Email: smart@smu.edu.cn

Keywords：

cone beam CT; flat detector; mechanical structure; synchronous control

DOI：

10.7507/1001-5515.20140243

Video：

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In the design of oral cone beam CT, cooperation between synergic control of X-ray source, real-time acquisition of flat detector and motion of mechanical structure affects the CT image quality. Based on the full analysis of the flat detector's timing signal characteristics, this research was carried out with microprocessor controller (MCU), complex programmable logic device (CPLD), and light couplings to design and realize synchronous exposure control system. To evaluate whether the design of the synchronous exposure control system in this project could reach the required imaging accuracy, we employed the projected images in the system to analyze its stability, linear consistency, signal to noise ratio and precede the FDK construction.

Citation： WANGHaowen, LUOYibin, XUYuan, ZHANGGuangpeng, ZHOULinghong. Design and Validation of Synchronous Exposure Control System of Dental Cone Beam CT. Journal of Biomedical Engineering, 2014, 31(6): 1283-1287. doi: 10.7507/1001-5515.20140243 Copy

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1. NOO F, CLACK R, WHITE T A, et al. The dual-ellipse cross vertex path for exact reconstruction of long objects in cone-beam tomography[J]. Phys Med Biol, 1998, 43(4):797-810.
2. HSIEH J. Computed tomography:principles, design, artifacta, and recent advances[M]. 2nd ed. Bellingham, Wash:SPIE Press, 2009:23-114.
3. SCARFE W C, FARMAN A G, SUKOVIE P. Clinical application of cone beam computed tomography in dental practice[J]. J Can Dent Assoc, 2006, 72(1):75-80.
4. 唐小山,房莉,曾飞煌,等.CBCT技术在多生牙诊断中的意义[J].CT理论与应用研究,2012, 21(2):329-334.
5. 罗守华,催燕难,薄腾飞,等.低辐射CBCT系统成像时序的控制与实现[J].科技导报,2012, 30(05):23-26.
6. 耿德根,宋建国,马潮.AVR高速嵌入式单片机原理与应用[M].修订版.北京:北京航空航天大学出版社,2002:8-22.
7. 潘松,黄继业.EDA技术实用教程[M].第二版.北京:科学出版社,2005:54-60.
8. 罗苑棠.CPLD/FPGA常用模块与综合系统设计实例精讲[M].北京:电子工业出版社,2007.
9. 张延伟,杨金岩,葛爱学,等.Verilog HDL程序设计实例详解[M].北京:人民邮电出版社,2008.
10. 张定华,RUOLA NING,卜昆,等.体积CT系统中的平板探测器校正方法[J].仪器仪表学报,2005, 26(2):157-163.
11. HSIEH J. Nonstationary noise characteristics of the helical scan and its impact on image quality and artifacts[J]. Med Phys, 1997, 24(9):1375-1384.
12. HSIEH J. Methods and apparatus for cone-tilted paralled sampling and reconstruction[J]. US Patent, 2001, 6(40):263-268.
13. PATCH S K, NISHIDE A, HAGIWARA A. Volumetric computed tomography data weights-resolution vs. artifact[J]. Radiol, 2002, 496(27):225-261.
14. HSIEH J.计算机断层成像技术:原理、设计、伪像和进展[M].张朝宗,郭志平,王贤刚,等译.北京:科学出版社,2006.
15. FELDKAMP L A, DAVIS L C, KRESS J W. Practical cone beam algorithm[J]. Opt Soc Am, 1984, 1(6):612-619.
16. 姬长国,段侪杰,王浩宇,等.基于Co_60放射源的锥束CT成像系统的研究[J].仪器仪表学报,2008, 29(9):1799-1803.

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