Patient-specific hyperparameter learning for optimization-based CT image reconstruction.
Patient-specific hyperparameter learning for optimization-based CT image reconstruction.
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DOI:
10.1088/1361-6560/ac0f9a
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发表时间:
2021-09-20
影响因子:
3.5
通讯作者:
Noo F
中科院分区:
文献类型:
--
作者:
Xu J;Noo F
We propose a hyperparameter learning framework that learns patient-specific hyperparameters for optimization-based image reconstruction problems for x-ray CT applications. The framework consists of two functional modules: (1) a hyperparameter learning module parameterized by a convolutional neural network, (2) an image reconstruction module that takes as inputs both the noisy sinogram and the hyperparameters from (1) and generates the reconstructed images. As a proof-of-concept study, in this work we focus on a subclass of optimization-based image reconstruction problems with exactly computable solutions so that the whole network can be trained end-to-end in an efficient manner. Unlike existing hyperparameter learning methods, our proposed framework generates patient-specific hyperparameters from the sinogram of the same patient. Numerical studies demonstrate the effectiveness of our proposed approach compared to bi-level optimization.
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DOI:
10.1109/tpami.2018.2883941
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影响因子:
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