Filtering of SPECT reconstructions made using Bellini's attenuation correction method: a comparison of three pre-reconstruction filters and a post-reconstruction Wiener filter

The authors evaluate a three-dimensional (3-D) Wiener filter which is used to restore SPECT (single photon emission computed tomography) reconstructions made using a method of attenuation correction described by S. Bellini et al. Its performance is compared to that of several preconstruction filters: (1) the one-dimensional (1-D) Butterworth, (2) the two-dimensional (2-D) Butterworth, and (3) a 2-D Wiener filter. An approximation to a clinical liver spleen study was used as the source distribution, and an algorithm which accounts for the depth- and distance-dependent blurring in SPECT was used to compute noise-free projections. To study the effect of filtering method on tumor detection accuracy, a 2-cm-diameter, cool spherical tumor (40% contrast) was placed at a known, but random, location within the liver. Projection sets for ten tumor locations were computed, and five noise realizations of each set were obtained by introducing Poisson noise. >

[1]  S. Bellini,et al.  Compensation of tissue absorption in emission tomography , 1979 .

[2]  Harrison H. Barrett,et al.  Quantitative Study Of Deconvolution And Display Mappings For Long-Tailed Point-Spread Functions , 1989, Medical Imaging.

[3]  P W Doherty,et al.  Digital restoration of indium-111 and iodine-123 SPECT images with optimized Metz filters. , 1986, Journal of nuclear medicine : official publication, Society of Nuclear Medicine.

[4]  Michael A. King,et al.  The Design of Optimal Two-Dimensional Pre-Reconstruction Restoration Filters for SPECT Images , 1987 .

[5]  B. C. Penney,et al.  Restoration of combined conjugate images in SPECT: comparison of a new Wiener filter and the image-dependent Metz filter , 1990 .

[6]  Michael A. King,et al.  An investigation of the stationarity of the 3D modulation transfer function of SPECT , 1989 .

[7]  M T Madsen.  A method for obtaining an approximate Wiener filter. , 1990, Medical physics.

[8]  M A King,et al.  Relative importance of the error sources in Wiener restoration of scintigrams. , 1990, IEEE Transactions on Medical Imaging.

[9]  K. M. Hanson,et al.  Method To Evaluate Image-Recovery Algorithms Based On Task Performance , 1988, Medical Imaging.

[10]  B. C. Penney,et al.  A projector, backprojector pair which accounts for the two-dimensional depth and distance dependent blurring in SPECT , 1990 .

[11]  Jannick P. Rolland,et al.  Factors influencing lesion detection in medical imaging. , 1990 .

[12]  Performance measures in the selection of reconstruction filters for SPECT imaging , 1985 .