Blind deblurring of spiral CT images - comparative studies on edge-to-noise ratios

被引:11
作者
Jiang, M [1 ]
Wang, G
Skinner, MW
Rubinstein, JT
Vannier, MW
机构
[1] Univ Iowa, Dept Radiol, CT Micro CT Lab, Iowa City, IA 52242 USA
[2] Peking Univ, Sch Math, Dept Informat Sci, Beijing 100871, Peoples R China
[3] Washington Univ, Dept Otolaryngol Head & Neck Surg, St Louis, MO 63110 USA
[4] Univ Iowa, Dept Otolaryngol, Iowa City, IA 52242 USA
[5] Univ Iowa, Dept Radiol, Iowa City, IA 52242 USA
关键词
spiral (helical) CT; Gaussian blurring; edge-to-noise ratios; blind deblurring (deconvolution);
D O I
10.1118/1.1470500
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
A recently developed blind deblurring algorithm based on the edge-to-noise ratio has been applied to improve the quality of spiral CT images. Since the discrepancy measure used to quantify the edge and noise effects is not symmetric, there are several ways to formulate the edge-to-noise ratio. This article is to investigate the performance of those ratios with phantom and patient data. In the phantom study, it is shown that all the ratios share similar proper-ties, validating the blind deblurring algorithm. The image fidelity improvement varies from 29% to 33% for different ratios, according to the root mean square error (RMSE) criterion; the optimal iteration number determined for each ratio varies from 25 to 35. Those ratios that are associated with most satisfactory performance are singled out for the image fidelity improvement of about 33% in the numerical simulation. After automatic blind deblurring with the selected ratios, the spatial resolution of CT is substantially refined in all the cases tested. (C) 2002 American Association of Physicists in Medicine.
引用
收藏
页码:821 / 829
页数:9
相关论文
共 15 条
[1]   Total variation blind deconvolution [J].
Chan, TF ;
Wong, CK .
IEEE TRANSACTIONS ON IMAGE PROCESSING, 1998, 7 (03) :370-375
[3]   MAXIMUM LIKELIHOOD FROM INCOMPLETE DATA VIA EM ALGORITHM [J].
DEMPSTER, AP ;
LAIRD, NM ;
RUBIN, DB .
JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES B-METHODOLOGICAL, 1977, 39 (01) :1-38
[4]   BLIND DECONVOLUTION OF QUANTUM-LIMITED INCOHERENT IMAGERY - MAXIMUM-LIKELIHOOD APPROACH [J].
HOLMES, TJ .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 1992, 9 (07) :1052-1061
[5]  
JIANG M, IN PRESS IEEE T MED
[6]  
Ketten DR, 1998, ANN OTO RHINOL LARYN, V107, P1
[7]  
KETTEN DR, 1994, CURR OPIN OTOLARYNGO, V2, P401
[8]   Blind image deconvolution [J].
Kundur, D ;
Hatzinakos, D .
IEEE SIGNAL PROCESSING MAGAZINE, 1996, 13 (03) :43-64
[9]   Blind image deconvolution revisited [J].
Kundur, D ;
Hatzinakos, D .
IEEE SIGNAL PROCESSING MAGAZINE, 1996, 13 (06) :61-63
[10]   Objective picture quality scale (PQS) for image coding [J].
Miyahara, M ;
Kotani, K ;
Algazi, VR .
IEEE TRANSACTIONS ON COMMUNICATIONS, 1998, 46 (09) :1215-1226