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冠状动脉CT血管造影图像标注方法的研究 被引量:1
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作者 尹燕伟 朱敏 +2 位作者 董祥梅 胡嘉航 李永生 《中华消化病与影像杂志(电子版)》 2022年第5期281-285,共5页
医学图像的分割和标注问题是目前医学图像处理方向研究的难点和热点。目前对于冠状动脉CT医学图像人工标注的标准尚未有统一的定义和一致的标注方法。为此根据医学影像中的器官位置探讨冠状动脉CT血管造影的图像标注方法,本文讨论了冠... 医学图像的分割和标注问题是目前医学图像处理方向研究的难点和热点。目前对于冠状动脉CT医学图像人工标注的标准尚未有统一的定义和一致的标注方法。为此根据医学影像中的器官位置探讨冠状动脉CT血管造影的图像标注方法,本文讨论了冠状动脉CT血管造影图像标注格式、原则和策略。结合分段标注原则在标注时将整个冠状动脉CT血管造影图像细化为十二段。结合具体实例阐述了右冠状动脉支分段和右后降支分段图像的具体标注方法,即选择标注、如何标注、标注形式等。这种针对医学影像器官位置的CT血管造影分段标注方法可以为医学图像的自动标注构建高效统一的训练数据集,提高以监督学习或者半监督学习方式为基础的自动图像标注的效率。 展开更多
关键词 冠状动脉 CT血管造影 CT图像标注 医学图像处理
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Establishment of the fundamental phase-to-polarization link in(ft)classical optics
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作者 Xiaoyu Weng Xiumin Gao +4 位作者 Guorong Sui Qiang Song xiangmei dong Junle Qu Songlin Zhuang 《Fundamental Research》 CAS 2021年第5期649-654,共6页
Vector polarization induced by a change in the scalar phase is far beyond our understanding of the relationship between polarization and phase in classical optics due to the entanglement of the inherent polarized mode... Vector polarization induced by a change in the scalar phase is far beyond our understanding of the relationship between polarization and phase in classical optics due to the entanglement of the inherent polarized modes of light beams.To overcome this limitation,we establish this miraculous relationship by the principle of phase vectorization,which can transform three particular phases into linear,circular and elliptical polarizations.A polarized-spatial light modulator based on the principle of phase vectorization can be achieved using a phase-only spatial light modulator,which not only enables pixel-level polarization manipulation of light beams in a real-time dynamic way but also simultaneously retains complete phase control.This work demonstrates the phase-to-polarization link and reports the creation of a polarized-spatial light modulator,which will transform our view of the natural properties of light beams and pave the way for the era of vector optics. 展开更多
关键词 POLARIZATION Vector optics Polarized-spatial light modulator
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