Three-dimensional image reconstruction for PET by multi-slice rebinning and axial image filtering

Three-dimensional image reconstruction for PET by multi-slice rebinning and axial image filtering
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通过多切片重组和轴向图像滤波进行 PET 三维图像重建

DOI:
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发表时间:
1994
影响因子:
3.5
通讯作者:
Joel S. Karp
Joel S. Karp
中科院分区:
工程技术2区
文献类型:
--
作者:
R. Lewitt;G. Muehllehner;Joel S. Karp

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描述了一种从正电子发射断层扫描(PET)中的三维(3D)符合数据重建体积图像的快速方法。重建方法利用高灵敏度PET系统采集的所有符合数据,这些系统不具有层间吸收器(隔片)来限制轴向接受角。重建方法只需要少量的存储和计算,使其非常适合动态和全身研究。该方法由三个步骤组成:(i)将符合数据重新分组到2D正弦图的堆叠中;(ii)与每个切片相关联的正弦图的逐切片重建,以产生在轴向(z)方向上具有强模糊但在不同z位置处具有不同模糊的初步3D图像;以及(iii)在轴向方向上对3D图像进行空间变化滤波(即,对于每个x-y列在z方向上进行1D滤波)以产生最终图像。第一步涉及一种新形式的重组操作,其中针对每个倾斜符合线增加多个正弦图(多切片重组)。轴向滤波步骤是制定和实施使用奇异值分解。该方法已成功地应用于模拟数据和测量数据的不同种类的幻影(多个点源,多个光盘,一个圆柱体与冷球,和一个3D脑幻影)。
A fast method is described for reconstructing volume images from three-dimensional (3D) coincidence data in positron emission tomography (PET). The reconstruction method makes use of all coincidence data acquired by high-sensitivity PET systems that do not have inter-slice absorbers (septa) to restrict the axial acceptance angle. The reconstruction method requires only a small amount of storage and computation, making it well suited for dynamic and whole-body studies. The method consists of three steps: (i) rebinning of coincidence data into a stack of 2D sinograms; (ii) slice-by-slice reconstruction of the sinogram associated with each slice to produce a preliminary 3D image having strong blurring in the axial (z) direction, but with different blurring at different z positions; and (iii) spatially variant filtering of the 3D image in the axial direction (i.e. 1D filtering in z for each x-y column) to produce the final image. The first step involves a new form of the rebinning operation in which multiple sinograms are incremented for each oblique coincidence line (multi-slice rebinning). The axial filtering step is formulated and implemented using the singular value decomposition. The method has been applied successfully to simulated data and to measured data for different kinds of phantom (multiple point sources, multiple discs, a cylinder with cold spheres, and a 3D brain phantom).
DOI: --
发表时间: 1990-05
期刊: Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子: --
作者:
Joel S. Karp;G. Muehllehner;D. Mankoff;Caesar E. Ordonez;John M. Ollinger;M. Daube-Witherspoon;Arthur T. Haigh;D. Beerbohm
通讯作者: Joel S. Karp;G. Muehllehner;D. Mankoff;Caesar E. Ordonez;John M. Ollinger;M. Daube-Witherspoon;Arthur T. Haigh;D. Beerbohm
DOI: --
发表时间: 1987-11
期刊: Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子: --
作者:
M. Daube-Witherspoon;G. Muehllehner
通讯作者: M. Daube-Witherspoon;G. Muehllehner
零函数和本征函数:成像系统分析工具。
DOI: --
发表时间: 1991
期刊: Progress in clinical and biological research
影响因子: --
作者:
Barrett,HH;Aarsvold,JN;Roney,TJ
通讯作者: Roney,TJ
DOI: 10.1088/0031-9155/37/3/020
发表时间: 1992
影响因子: 3.5
作者:
Cherry,SR;Dahlbom,M;Hoffman,EJ
通讯作者: Hoffman,EJ