A simple model for the efficient correction of collimator blur in 3D SPECT imaging

被引:35
作者
Boccacci, P
Bonetto, P
Calvini, P
Formiconi, AR
机构
[1] Univ Genoa, INFM, I-16146 Genoa, Italy
[2] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy
[3] Univ Genoa, Dipartimento Informat & Sci Informaz, I-16146 Genoa, Italy
[4] Univ Florence, Sez Med Nucl, Dipartimento Fisiopatol Clin, I-50134 Florence, Italy
关键词
D O I
10.1088/0266-5611/15/4/306
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
The problem of performing an efficient compensation of collimator blur in the three-dimensional (3D) reconstruction of SPECT data acquired in parallel beam geometry is tackled. An approximate model for data acquisition is developed, which leads to thr construction of the corresponding projector-backprojector pair. In order to perform some numerical tests, the model is customized to a state-of-the-art neuro-SPECT scanner, which is supplied with a three-segmented parallel beam collimator. Some reconstruction algorithms based on this customization are presented and their results are compared, in terms of quality and timing requirements, with the outcome generated by the corresponding fully 3D model. According to this numerical simulation, where voxel-driven (back-)projectors are used, the conclusion can be drawn that the approximate model produces reconstructions as good as the ones generated by the fully 3D model in a time which is one order of magnitude shorter. In the case that (back-)projectors based on the rotation of the emission matrix are used, the proposed approximate model is evaluated to be about four times faster than the corresponding fully 3D model.
引用
收藏
页码:907 / 930
页数:24
相关论文
共 38 条
[1]  
BAILEY DL, 1994, EUR J NUCL MED, V21, P381
[2]  
Baldini D, 1998, PHYS MEDICA, V14, P159
[3]   Regularization methods in image restoration: An application to HST images [J].
Bertero, M ;
Boccacci, P ;
Maggio, F .
INTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY, 1995, 6 (04) :376-386
[4]  
BERTERO M, 1989, ADV ELECTRON EL PHYS, V75, P1
[5]  
Bertero M., 1998, Introduction to Inverse Problems in Imaging (Advanced Lectures in Mathematics)
[6]   ITERATIVE BEHANDLUNG LINEARER FUNKTIONALGLEICHUNGEN [J].
BIALY, H .
ARCHIVE FOR RATIONAL MECHANICS AND ANALYSIS, 1959, 4 (02) :166-176
[7]   EMISSION COMPUTER-ASSISTED TOMOGRAPHY WITH SINGLE-PHOTON AND POSITRON-ANNIHILATION PHOTON EMITTERS [J].
BUDINGER, TF ;
DERENZO, SE ;
GULLBERG, GT ;
GREENBERG, WL ;
HUESMAN, RH .
JOURNAL OF COMPUTER ASSISTED TOMOGRAPHY, 1977, 1 (01) :131-145
[8]   MAXIMUM A-POSTERIORI ESTIMATION FOR SPECT USING REGULARIZATION TECHNIQUES ON MASSIVELY-PARALLEL COMPUTERS [J].
BUTLER, CS ;
MILLER, MI .
IEEE TRANSACTIONS ON MEDICAL IMAGING, 1993, 12 (01) :84-89
[9]   COMPENSATION OF SPATIAL SYSTEM RESPONSE IN SPECT WITH CONJUGATE-GRADIENT RECONSTRUCTION TECHNIQUE [J].
FORMICONI, AR ;
PUPI, A ;
PASSERI, A .
PHYSICS IN MEDICINE AND BIOLOGY, 1989, 34 (01) :69-84
[10]   World Wide Web interface for advanced SPECT reconstruction algorithms implemented on a remote massively parallel computer [J].
Formiconi, AR ;
Passeri, A ;
Guelfi, MR ;
Masoni, M ;
Pupi, A ;
Meldolesi, U ;
Malfetti, P ;
Calori, L ;
Guidazzoli, A .
INTERNATIONAL JOURNAL OF MEDICAL INFORMATICS, 1997, 47 (1-2) :125-138