Maximum-likelihood estimation of Rician distribution parameters

被引：270

作者：

Sijbers, J ^{[1
]}

den Dekker, AJ ^{[1
]}

Scheunders, P ^{[1
]}

Van Dyck, D ^{[1
]}

机构：

[1] Univ Antwerp, Dept Phys, B-2020 Antwerp, Belgium

来源：

IEEE TRANSACTIONS ON MEDICAL IMAGING | 1998年 / 17卷 / 03期

关键词：

maximum likelihood (ML); magnetic resonance (MR) images; parameter estimation; Rician distribution;

D O I：

10.1109/42.712125

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

The problem of parameter estimation from Rician distributed data (e.g., magnitude magnetic resonance images) is addressed. The properties of conventional estimation methods are discussed and compared to maximum-likelihood (ML) estimation which is known to yield optimal results asymptotically. In contrast to previously proposed methods, ML estimation is demonstrated to be unbiased for high signal-to-noise ratio (SNR) and to yield physical relevant results for low SNR.

引用

收藏

页码：357 / 361

页数：5

相关论文

共 21 条

[1] Analysis of noise in phase contrast MR imaging [J].

Andersen, AH ;

Kirsch, JE .

MEDICAL PHYSICS, 1996, 23 (06) :857-869

[2] IMPROVED DETECTABILITY IN LOW SIGNAL-TO-NOISE RATIO MAGNETIC-RESONANCE IMAGES BY MEANS OF A PHASE-CORRECTED REAL RECONSTRUCTION [J].

BERNSTEIN, MA ;

THOMASSON, DM ;

PERMAN, WH .

MEDICAL PHYSICS, 1989, 16 (05) :813-817

[3] T-2 maximum likelihood estimation from multiple spin-echo magnitude images [J].

Bonny, JM ;

Zanca, M ;

Boire, JY ;

Veyre, A .

MAGNETIC RESONANCE IN MEDICINE, 1996, 36 (02) :287-293

[4]

Garnier S. J., 1995, Journal of Mathematical Imaging and Vision, V5, P7, DOI 10.1007/BF01250250

[5] NONLINEAR ANISOTROPIC FILTERING OF MRI DATA [J].

GERIG, G ;

KUBLER, O ;

KIKINIS, R ;

JOLESZ, FA .

IEEE TRANSACTIONS ON MEDICAL IMAGING, 1992, 11 (02) :221-232

[6] THE RICIAN DISTRIBUTION OF NOISY MRI DATA [J].

GUDBJARTSSON, H ;

PATZ, S .

MAGNETIC RESONANCE IN MEDICINE, 1995, 34 (06) :910-914

[7] MEASUREMENT OF SIGNAL INTENSITIES IN THE PRESENCE OF NOISE IN MR IMAGES [J].

HENKELMAN, RM .

MEDICAL PHYSICS, 1985, 12 (02) :232-233

[8] MEASURING SIGNAL-TO-NOISE RATIOS IN MR IMAGING [J].

KAUFMAN, L ;

KRAMER, DM ;

CROOKS, LE ;

ORTENDAHL, DA .

RADIOLOGY, 1989, 173 (01) :265-267

[9] AN UNBIASED SIGNAL-TO-NOISE RATIO MEASURE FOR MAGNETIC-RESONANCE IMAGES [J].

MCGIBNEY, G ;

SMITH, MR .

MEDICAL PHYSICS, 1993, 20 (04) :1077-1078

[10] THE USE OF POWER IMAGES TO PERFORM QUANTITATIVE-ANALYSIS ON LOW SNR MR-IMAGES [J].

MILLER, AJ ;

JOSEPH, PM .

MAGNETIC RESONANCE IMAGING, 1993, 11 (07) :1051-1056