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| Control and Realization of Time Sequence for Low-dose Cone-Beam CT Imaging System |
| LUO Shouhua1, CUI Yannan1, BO Tengfei1, LI Guang1, CHEN Gong2 |
| 1. School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China;2. Information Department, Jiangsu Province Hospital of Traditional Chinese Medicine, Nanjing 210029, China |
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Abstract: The basic working principle of Cone Beam Computer Tomography (CBCT) is briefly described, the advantages and disadvantages of both continuous and pulsed X-ray imaging methods are analyzed, and the pulsed X-ray imaging method is adopted to implement the design of low-dose CBCT. On the basis of this, the internal and external trigger modes of PaxScan 2520 flat panel detector are realized. The experiment results show that the method of continuous X-ray imaging needs dozens of seconds for the process rotating a circle, in the meanwhile, the method of pulsed X-ray imaging only needs about four seconds for doing same job. In a word, pulsed X-ray imaging reduces the X-ray radiation time considerably and improves the safety performance of CBCT significantly. Besides, pulsed X-ray imaging with internal and external trigger modes has no difference in terms of image quality. The choice for the modes depends on whether or not needs active control for X-ray emission.
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Received: 31 January 2012
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2012, Vol. 30 
