Translator Disclaimer
1 October 2007 Partial volume and distribution estimation from multispectral images using continuous representations
Author Affiliations +
When estimating partial volume effects in the presence of noise, using neighboring information improves the estimation. The optimal linear transformation (OLT) is an unbiased minimum variance estimator. However, it does not use neighboring information and thus is sensitive to noise. We employ polynomial and B-spline continuous representations of the data to mathematically incorporate the neighboring information into the OLT. To evaluate the method, we use synthetic and actual images generated by simulation and acquired from phantoms and the human brain. Standard deviations of new estimators are up to 60% less than that of the OLT when the signal-to-noise ratio (SNR) is 25. As the SNR decreases, the proposed method demonstrates more improvements. Overall, B-spline estimators provide larger estimations of the standard deviation compared to polynomials. However, B-spline estimators outperform polynomials, providing an arbitrary degree of continuity. B-spline estimators are up to 10 times faster than polynomials and about 10 times slower than the OLT.
©(2007) Society of Photo-Optical Instrumentation Engineers (SPIE)
Mohammad-Reza Siadat and Hamid Soltanian-Zadeh "Partial volume and distribution estimation from multispectral images using continuous representations," Journal of Electronic Imaging 16(4), 043001 (1 October 2007).
Published: 1 October 2007

Back to Top