PMID: 15248577Jul 14, 2004Paper

3D RBI-EM reconstruction with spherically-symmetric basis function for SPECT rotating slat collimator

Physics in Medicine and Biology
Wenli WangDaniel Gagnon

Abstract

A single photon emission computed tomography (SPECT) rotating slat collimator with strip detector acquires distance-weighted plane integral data, along with the attenuation factor and distance-dependent detector response. In order to image a 3D object, the slat collimator device has first to spin around its axis and then rotate around the object to produce 3D projection measurements. Compared to the slice-by-slice 2D reconstruction for the parallel-hole collimator and line integral data, a more complex 3D reconstruction is needed for the slat collimator and plane integral data. In this paper, we propose a 3D RBI-EM reconstruction algorithm with spherically-symmetric basis function, also called 'blobs', for the slat collimator. It has a closed and spherically symmetric analytical expression for the 3D Radon transform, which makes it easier to compute the plane integral than the voxel. It is completely localized in the spatial domain and nearly band-limited in the frequency domain. Its size and shape can be controlled by several parameters to have desired reconstructed image quality. A mathematical lesion phantom study has demonstrated that the blob reconstruction can achieve better contrast-noise trade-offs than the voxel recons...Continue Reading

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Citations

Apr 29, 2014·IEEE Transactions on Medical Imaging·Kun WangMark A Anastasio
Jul 30, 2010·IEEE Transactions on Medical Imaging·Lin ZhouJohan Nuyts
Mar 22, 2008·Physics in Medicine and Biology·Roel Van HolenIgnace Lemahieu
Jan 10, 2009·Physics in Medicine and Biology·Roel Van HolenIgnace Lemahieu
Oct 26, 2011·Physics in Medicine and Biology·Roel Van HolenStefaan Vandenberghe
Oct 21, 2015·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Younes BenkarroumStuart W Rowland
Jul 1, 2018·Biomedical Physics & Engineering Express·Gengsheng L Zeng

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