期刊文献+

用一种新滤波函数作CT图像局部重建 被引量:5

The Principle of Local Tomography with a New Filter
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摘要  详细阐述了用一种新型滤波函数进行CT图像局部重建的原理,并给出了这种重建的二次误差估计.然后在计算机上对模拟和实测数据进行了局部重建实验,结果表明该算法简便快速,重建图像Gibbs效应减小并具有较高的空间及密度分辨率. It introduces the principle of local tomography algorithm with a new filter.The second order error estimation is obtained.The local reconstruction of simulation and experimental projection data show that the local tomography algorithm is simple and fast,by which the resolution and Gibbs effect of the reconstructed images can be improved.
出处 《计算物理》 CSCD 北大核心 2004年第3期362-368,共7页 Chinese Journal of Computational Physics
基金 国家自然科学基金(No.69972047及No.69931010)资助项目
关键词 局部重建 滤波函数 时频特性 误差估计 图像识别 密度分辨率 local tomography new filter time-frequency character error estimation fast decay of side-peak
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参考文献6

  • 1Herman G T. Image reconstruction from projections [M]. Academic Press, INC. 1980.
  • 2Ramm A G, Katsevich A I. The radon transform and local tomography [M]. CRC Press, 1996.
  • 3Faridan A, Ritman E L, Simith K T. Local tomography [J]. SIAM J Appl Math Aprl, 1992,52(2) :459 - 484.
  • 4Farrokh Rashid-Farrokhi, Ray Liu K L, Berenstein A, Walnut D. Wavelet-Based multiresolution local tomography [J]. IEEE Trans on Image Processing, 1997,6(10): 159 - 166.
  • 5Munshi P. Error analysis of tomographic filters I: theory [J]. NDT&E International, 1992,25:191 - 194.
  • 6Munshi P, Rathoke R K S, Ram K S, Kalra M S. Error analysis of Tomographic filters Ⅱ :Results [J]. NDT&E International, 1993,26: 235 - 240.

同被引文献49

  • 1杨民,路宏年,傅健.基于卷积反投影CT重建的一种新型实用滤波函数[J].CT理论与应用研究(中英文),2000,9(z1):29-32. 被引量:6
  • 2张剑,陈志强.三维锥形束CT成像FDK重建算法发展综述[J].中国体视学与图像分析,2005,10(2):116-121. 被引量:35
  • 3李亮,陈志强,康克军.CT局部重建算法发展综述[J].核电子学与探测技术,2005,25(6):881-886. 被引量:8
  • 4Turbell H.Cone-beam reconstruction using filtered back projection.Sweden:UniTryck,2001.
  • 5Smith BD.Image reconstruction from cone-beam projections:necessary and sufficient condition and reconstruction methords.IEEE Trans Med Imaging,1985,4(1):14-28.
  • 6Grangeat P.Mathematical framework of cone beam 3D reconstruction via the first derivative of the radon transform//Herman GT,Louis AK,Natterer F,et al.Mathmetical Methords in tomography.New York:Springer Verlag,1991:66-91.
  • 7翟静 潘晋孝.混合滤波函数在FDK算法中的应用[J].南昌航空大学学报自然科学版,2007,21(4):263-266.
  • 8Wei YC,Wang G.An intuitive discussion on the ideal ramp filter in computerd tomograghy.Computers & Mathematics with Applications,2004,49(5-6):731-740.
  • 9Men K,Dai J,Li M,et al.A method to correct the influence of carbon fiber couchtop and patient positioning device on image quality of cone beam CT.Med Phys,2010,37(6):2466-2472.
  • 10Grass M,Khler T,Proksa R.3D cone-beam CT reconstruction for circular trajectories.Phys Med Biol,2000,45(2):329-347.

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