Gamma ray imaging using coded aperture masks: a computer simulation approach
作者： J. Jimenez , Pedro Olmos , J. L. de Pablos , J. M. Perez
DOI: 10.1364/AO.30.000549
关键词: Gamma ray 、 Collimator 、 Coded aperture 、 Deconvolution 、 Optics 、 Image quality 、 Detector 、 Point spread function 、 Point (geometry) 、 Image processing 、 Computer science
摘要: The γ-ray imaging using coded aperture masks as focusing elements is an extended technique for static position sensitive detectors. Several transfer functions have been proposed to implement mathematically the set of holes in mask, uniformly redundant array collimator being most popular design. A considerable amount work has done improve digital methods deconvolve image, formed at detector plane, with this function. Here we present a study behavior these techniques when applied geometric shadows produced by point emitters. Comparison shape object reconstructed from that resulting analytical reconstruction performed, defining validity ranges usual algorithmic approximations reported literature. Finally, several improvements are discussed.
osapublishing.org
harvard.edu参考文章(9)
J. G. Ables, Fourier transform photography: a new method for X-ray astronomy Publications of the Astronomical Society of Australia. ,vol. 1, pp. 172- 173 ,(1968) , 10.1017/S1323358000011292
E. E. Fenimore, T. M. Cannon, Coded aperture imaging with uniformly redundant arrays Applied Optics. ,vol. 17, pp. 337- 347 ,(1978) , 10.1364/AO.17.000337
R. H. Dicke, SCATTER-HOLE CAMERAS FOR X-RAYS AND GAMMA RAYS. The Astrophysical Journal. ,vol. 153, ,(1968) , 10.1086/180230
J. B. Stephen, G. Di Cocco, L. Natalucci, A. Spizzichino, E. Caroli, Coded aperture imaging in X- and gamma-ray astronomy Space Science Reviews. ,vol. 45, pp. 349- 403 ,(1987) , 10.1007/BF00171998
Philip P. Dunphy, Mark L. McConnell, Alan Owens, Edward L. Chupp, David J. Forrest, Jonathan Googins, A balloon-borne coded aperture telescope for low-energy gamma-ray astronomy Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment. ,vol. 274, pp. 362- 379 ,(1989) , 10.1016/0168-9002(89)90403-8
T. M. Cannon, E. E. Fenimore, Tomographical imaging using uniformly redundant arrays. Applied Optics. ,vol. 18, pp. 1052- 1057 ,(1979) , 10.1364/AO.18.001052
E. E. Fenimore, T. M. Cannon, Uniformly redundant arrays: digital reconstruction methods Applied Optics. ,vol. 20, pp. 1858- 1864 ,(1981) , 10.1364/AO.20.001858
G. K. Skinner, Imaging with coded-aperture masks. Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment. ,vol. 221, pp. 33- 40 ,(1984)
G.K. Skinner, Imaging with coded-aperture masks Nuclear Instruments and Methods in Physics Research. ,vol. 221, pp. 33- 40 ,(1984) , 10.1016/0167-5087(84)90174-1