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宁夏大学 物理与电子电气工程学院, 宁夏 银川 750021
Received:25 September 2020,
Revised:13 November 2020,
Published:2021-05
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Yan JIANG, Yu MA, Yue LU, et al. Comparative study of the multi-atlas segmentation algorithm based on ANTs registration[J]. Chinese journal of liquid crystals and displays, 2021, 36(5): 723-732.
Yan JIANG, Yu MA, Yue LU, et al. Comparative study of the multi-atlas segmentation algorithm based on ANTs registration[J]. Chinese journal of liquid crystals and displays, 2021, 36(5): 723-732. DOI: 10.37188/CJLCD.2020-0251.
为提高海马体多图谱分割的精度和时间效率,提出基于高等标准化工具(Advanced Normalization Tools,ANTs)配准的多图谱分割算法。为降低数据规模,在预处理阶段,提取以海马体为中心的立方体box。在配准阶段,提出用ANTs代替重采样环节,再利用微分同胚Demons算法的平滑性、拓扑保持性以及连续性进行精配准。在标签融合阶段,采用加权平均(Majority Voting,MV)算法、基于生成模型约束的GraphCut标签融合(Generative Model,GM)算法、度量学习(Metric Learning,ML)算法以及半监督标签传播随机森林(Integrating Semi-Supervised Label Propagation and Random Forests,RF-SSLP)算法做对比。实验结果表明,用ANTs代替重采样后,可分别提高MV、GM、ML以及RF-SSLP四种融合算法的精度,同时,通过以上4种融合算法的对比发现,基于ANTs配准的半监督标签传播随机森林算法分割精度最高,相较于MV、GM和ML三种融合算法精度提高了3%~5%。
In order to improve the accuracy and time efficiency of hippocampus multi-atlas segmentation
an algorithm based on Advanced Normalization Tools (ANTs) registration was proposed. In order to reduce the data size
a box with hippocampus as the center was extracted in the preprocessing stage. In the registration stage
ANTs were used to replace the resampling link
and the smoothness
topological retention and continuity of the differential Diffeomorphic Demons algorithm were used to perform accurate registration. In the tag fusion stage
four fusion algorithms including weighted average (Majority Voting
MV) algorithm
GraphCut tag fusion (Generative Model
GM) algorithm based on generated model constraints
metric learning (Metric Learning
ML) algorithm and semi-supervised tag propagation random forest (Integrating Semi-Supervised Label Propagation and Random Forests
RF-SSLP) algorithm were compared. The experimental results show that after replacing resampling with ANTs
the accuracy of four fusion algorithms including MV
GM
ML and RF-SSLP can be improved
respectively. Meanwhile
through the comparison of the above four fusion algorithms
it is found that the semi-supervised random forest algorithm based on ANTs registration has the highest segmentation accuracy
which is improved by 3%~5% compared with MV
GM and ML fusion algorithms.
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