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Micro CT system is a recently developed imaging technique for small animal, which have very high spatial resolution and sensitivity, and is widely used in drug development, cancer detection et al. But in Micro CT, the artifact, specially the aliasing artifact, become serious as the extremely high spatial resolution, which is the major degeneration of image quality. In this paper, we studied the cause of artifact, and simulated it in computer. Finally, we proposed an algorithm to reduce the artifact in CT slice, with artifact elimination rate of 70% or more, and the improved image contrase
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Keywords:
- Micro CT /
- aliasing artifacts /
- adaptive filtering
[1] Feldkamp L A, Davis L C, Kress J W 1984 J. Opt. Soc. Am. A 1 612
[2] Shu H, Zhu P P, Wang J Y, Gao X, Yin H X, Liu B, Yuan Q X,Huang W X,Luo S Q, Gao X L, Wu Z Y, Fang S X 2005 Acta Phys. Sin. 54 1099(in Chinese)[舒 航、朱佩平、王寯越、高 欣、伊红霞、刘 波、袁清习、黄万霞、罗述谦、高秀来、吴自玉、方守贤 2005 54 1099]
[3] Bao H, Zhang K 2009 CCCM 2009 SanYa,China August 8-9 p198
[4] Axel W, Michal S, Clemens E 2009 Opt. Exp. 17 11098
[5] Zhang K, Zhu P P, Huang W X, Yuan Q X, Liu L, Yuan Bi, Wang J Y, Shu H, Chen B, Liu Y J, Li E R, Liu X S, Wu Z Y 2008 Acta Phys. Sin. 57 3410(in Chinese) [张 凯、朱佩平、 黄万霞、袁清习、刘 力、袁 斌、王寯越、舒 航、陈 博、刘宜晋、李恩荣、刘小松、吴自玉 2008 57 3410]
[6] Yang X Q, Deng Y, Deng Z L, Luo Q M,Gong H 2009 Chinese J. of Med. Instrum. 33 255(in Chinese)[杨孝全、邓 勇、邓子林、骆清铭、龚 辉 2009 中国医疗器械杂志 33 255]
[7] Friedenberg A 1997 Opt. Eng. 36 1745
[8] Tischenko O, Xu Y, Goetzfried T, Bogner L,Hoeschen C 2009 Proc. of SPIE 2009 Lake Buena Vista, FL, USA February 9,2009 p72583F-1
[9] Sohval A R, Freundlich D 1986 U.S. Patent 4 637040
[10] Leng S, Zambelli J 2008 Med. Phys. 35 4649
[11] Badea C T, Schreibmann E, Fox T 2008 Med. Phys. 35 1170
[12] Lin C Y, Lee W J 2006 J. Digit Imaging 19 351
[13] Brooks R A, Glover G H, Talbert A J, Eisner R L, DiBianca F A 1979 J. Comput. Assist. Tomo. 3 433
[14] Shi J J, Liu J, Liu J,Li B Y 2007 Chin. Phys. 16 266
[15] Li Z,Chen G H,Zhang L H,Yang Q S,Feng J 2005 Chin. Phys. 14 1095
[16] Wang X R,Bu Q F,Zhang D Y 2009 Opt. Lett. 34 3382
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[1] Feldkamp L A, Davis L C, Kress J W 1984 J. Opt. Soc. Am. A 1 612
[2] Shu H, Zhu P P, Wang J Y, Gao X, Yin H X, Liu B, Yuan Q X,Huang W X,Luo S Q, Gao X L, Wu Z Y, Fang S X 2005 Acta Phys. Sin. 54 1099(in Chinese)[舒 航、朱佩平、王寯越、高 欣、伊红霞、刘 波、袁清习、黄万霞、罗述谦、高秀来、吴自玉、方守贤 2005 54 1099]
[3] Bao H, Zhang K 2009 CCCM 2009 SanYa,China August 8-9 p198
[4] Axel W, Michal S, Clemens E 2009 Opt. Exp. 17 11098
[5] Zhang K, Zhu P P, Huang W X, Yuan Q X, Liu L, Yuan Bi, Wang J Y, Shu H, Chen B, Liu Y J, Li E R, Liu X S, Wu Z Y 2008 Acta Phys. Sin. 57 3410(in Chinese) [张 凯、朱佩平、 黄万霞、袁清习、刘 力、袁 斌、王寯越、舒 航、陈 博、刘宜晋、李恩荣、刘小松、吴自玉 2008 57 3410]
[6] Yang X Q, Deng Y, Deng Z L, Luo Q M,Gong H 2009 Chinese J. of Med. Instrum. 33 255(in Chinese)[杨孝全、邓 勇、邓子林、骆清铭、龚 辉 2009 中国医疗器械杂志 33 255]
[7] Friedenberg A 1997 Opt. Eng. 36 1745
[8] Tischenko O, Xu Y, Goetzfried T, Bogner L,Hoeschen C 2009 Proc. of SPIE 2009 Lake Buena Vista, FL, USA February 9,2009 p72583F-1
[9] Sohval A R, Freundlich D 1986 U.S. Patent 4 637040
[10] Leng S, Zambelli J 2008 Med. Phys. 35 4649
[11] Badea C T, Schreibmann E, Fox T 2008 Med. Phys. 35 1170
[12] Lin C Y, Lee W J 2006 J. Digit Imaging 19 351
[13] Brooks R A, Glover G H, Talbert A J, Eisner R L, DiBianca F A 1979 J. Comput. Assist. Tomo. 3 433
[14] Shi J J, Liu J, Liu J,Li B Y 2007 Chin. Phys. 16 266
[15] Li Z,Chen G H,Zhang L H,Yang Q S,Feng J 2005 Chin. Phys. 14 1095
[16] Wang X R,Bu Q F,Zhang D Y 2009 Opt. Lett. 34 3382
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