PMID- 16468457
OWN - NLM
STAT- MEDLINE
DCOM- 20060307
LR  - 20061115
IS  - 0278-0062 (Print)
IS  - 0278-0062 (Linking)
VI  - 25
IP  - 2
DP  - 2006 Feb
TI  - Modeling the amplitude statistics of ultrasonic images.
PG  - 229-40
AB  - In this paper, a new statistical model for representing the amplitude statistics 
      of ultrasonic images is presented. The model is called the Rician inverse 
      Gaussian (RiIG) distribution, due to the fact that it is constructed as a mixture 
      of the Rice distribution and the Inverse Gaussian distribution. The probability 
      density function (pdf) of the RiIG model is given in closed form as a function of 
      three parameters. Some theoretical background on this new model is discussed, and 
      an iterative algorithm for estimating its parameters from data is given. Then, 
      the appropriateness of the RiIG distribution as a model for the amplitude 
      statistics of medical ultrasound images is experimentally studied. It is shown 
      that the new distribution can fit to the various shapes of local histograms of 
      linearly scaled ultrasound data better than existing models. A log-likelihood 
      cross-validation comparison of the predictive performance of the RiIG, the K, and 
      the generalized Nakagami models turns out in favor of the new model. Furthermore, 
      a maximum a posteriori (MAP) filter is developed based on the RiIG distribution. 
      Experimental studies show that the RiIG MAP filter has excellent filtering 
      performance in the sense that it smooths homogeneous regions, and at the same 
      time preserves details.
FAU - Eltoft, Torborn
AU  - Eltoft T
AD  - Department of Physics, Faculty of Science, University of Tromso, Norway. 
      torbjorn.eltoft@phys.uit.no
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - United States
TA  - IEEE Trans Med Imaging
JT  - IEEE transactions on medical imaging
JID - 8310780
SB  - IM
MH  - *Algorithms
MH  - Computer Simulation
MH  - Data Interpretation, Statistical
MH  - Humans
MH  - Image Enhancement/*methods
MH  - Image Interpretation, Computer-Assisted/*methods
MH  - Imaging, Three-Dimensional/methods
MH  - Information Storage and Retrieval/methods
MH  - *Models, Biological
MH  - *Models, Statistical
MH  - Reproducibility of Results
MH  - Sensitivity and Specificity
MH  - Ultrasonography/*methods
EDAT- 2006/02/14 09:00
MHDA- 2006/03/08 09:00
CRDT- 2006/02/14 09:00
PHST- 2006/02/14 09:00 [pubmed]
PHST- 2006/03/08 09:00 [medline]
PHST- 2006/02/14 09:00 [entrez]
AID - 10.1109/TMI.2005.862664 [doi]
PST - ppublish
SO  - IEEE Trans Med Imaging. 2006 Feb;25(2):229-40. doi: 10.1109/TMI.2005.862664.