Stochastic level set evolution for nonlinear phase contrast tomography

[摘要] A stochastic pertubation of a level-set regularization method to find stable inverses for the nonlinear reconstruction of the complex refractive index in in-line phase tomography is presented under the assumption that the index is piecewise constant. The stochastic algorithm is tested on a multi-material object. It is useful to escape the local minima with decrease of the reconstruction errors localized on the boundaries.

[发布机构] CREATIS, INSA-Lyon; Inserm, U1044; CNRS UMR 5220, Université Lyon 1, Université de Lyon, Lyon; 69621, France^1

[效力级别] 计算机科学 [学科分类] 计算机科学（综合）

[关键词] Complex refractive index;Level-set evolution;Non linear reconstruction;Phase tomography;Piece-wise constants;Reconstruction error;Regularization methods;Stochastic algorithms