An overlapping subzone technique for MR-based elastic property reconstruction

Autor:	E E, Van Houten, K D, Paulsen, M I, Miga, F E, Kennedy, J B, Weaver
Rok vydání:	1999
Předmět:	Male Finite Element Analysis Image Processing Computer-Assisted Brain Humans Female Breast Magnetic Resonance Imaging Algorithms Elasticity
Zdroj:	Magnetic resonance in medicine. 42(4)
ISSN:	0740-3194
Popis:	A finite element-based nonlinear inversion scheme for magnetic resonance (MR) elastography is detailed. The algorithm operates on small overlapping subzones of the total region of interest, processed in a hierarchical order as determined by progressive error minimization. This zoned approach allows for a high degree of spatial discretization, taking advantage of the data-rich environment afforded by the MR. The inversion technique is tested in simulation under high-noise conditions (15% random noise applied to the displacement data) with both complicated user-defined stiffness distributions and realistic tissue geometries obtained by thresholding MR image slices. In both cases the process has proved successful and has been capable of discerning small inclusions near 4 mm in diameter. Magn Reson Med 42:779-786, 1999.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=pmid________::2f7f2837d9bb2ba01d1706b6619e0cb0 https://pubmed.ncbi.nlm.nih.gov/10502768 Zobrazit plný text záznamu Plný text