Spatial two‐tissue compartment model for dynamic contrast‐enhanced magnetic resonance imaging
Spatial two‐tissue compartment model for dynamic contrast‐enhanced magnetic resonance imaging
复制标题
用于动态对比增强磁共振成像的空间两组织室模型
DOI:
10.1111/rssc.12057
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Schmid
中科院分区:
文献类型:
--
作者:
Sommer;Schmid
In the quantitative analysis of Dynamic Contrast-Enhanced Magnetic Resonance Imaging (DCE-MRI) compartment models allow to describe the uptake of contrast medium with biological meaningful kinetic parameters. As simple models often fail to adequately describe the observed uptake behavior, more complex compartment models have been proposed. However, the nonlinear regression problem arising from more complex compartment models often suffers from parameter redundancy. In this paper, we incorporate spatial smoothness on the kinetic parameters of a two tissue compartment model by imposing Gaussian Markov random field priors on them. We analyse to what extent this spatial regularisation helps to avoid parameter redundancy and to obtain stable parameter estimates. Choosing a full Bayesian approach, we obtain posteriors and point estimates running Markov Chain Monte Carlo simulations. The proposed approach is evaluated for simulated concentration time curves as well as for in vivo data from a breast cancer study.
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G. Shah;N. Fischbein;D. Gandhi;S. Mukherji
DOI:
--
发表时间:
2012
期刊:
Medical Imaging
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