中国组织工程研究与临床康复2011，Vol.15Issue(52)：9797-9802,6.DOI:10.3969/j.issn.1673-8225.2011.52.025
结合各向异性扩散滤波Thin Plate先验正电子发射断层图像重建的算法
Image reconstruction algorithm for positron emission tomography with Thin Plate prior combined with an anisotropic diffusion filter
摘要
Abstract
BACKGROUND: In positron emission tomography imaging, maximun posterior (MAP) reconstruction can greatly improve thequality of reconstructed image by introducing prior distribution constraint. But a improper prior distribution may result inover-smoothess and stepladder edge of reconstructed image.OBJECTIVE: To put forward an algorithm combines with anisotropic diffusion filter and MAP improved by Thin Plate prioraccording to over-smoothess and stepladder edge of reconstructed image by traditional MAP with local prior information.METHODS: Reconstruction algorithm consists of anisotropic diffusion filter based on equation with forward -and-backwarddiffusion coefficient and MAP estimation based on Thin Plate prior. Reconstructed images were obtained by the alternate iterationof the above two steps. The quality of reconstructed images was evaluate by normalized rms error (RMSE) and signal-to-noiseratio (SNR).RESULTS AND CONCLUSION: Reconstructed images obtained by MAP with second-order second Thin Plate prior modelcombined with anisotropic diffusion filter based on forward -and-backward diffusion coefficient partial differential equation wereimproved in restrain noise, edge-preserving, SNR, RMSE, visual evaluation and so on.关键词
正电子发射断层成像/图像重建/Thin Plate先验/各向异性扩/散分类
医药卫生引用本文复制引用
张权,刘祎..结合各向异性扩散滤波Thin Plate先验正电子发射断层图像重建的算法[J].中国组织工程研究与临床康复,2011,15(52):9797-9802,6.基金项目
山西省自然科学基金重点项目(2009011020-2) （2009011020-2）
山西省高等学校科技开发项目资助(20081024) （20081024）
中北大学2008年校青年科学基金. （）
