专注型Ptycho-Tomography (APT) 用于以最小的数据采集和计算时间进行三维纳米X射线成像
Iksung Kang1,2, Ziling Wu3,4, Yi Jiang5
1Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
Light, science & applications
|May 29, 2023
概括
注意型心电图 (APT) 使用机器学习显著加快纳米级物体的X射线成像,如集成电路. 这种新方法大大缩短了扫描时间,同时保持了高质量的3D重建.
科学领域:
- 纳米尺度成像成像技术
- 在X射线显微镜中使用X射线显微镜.
- 计算机成像成像技术
背景情况:
- 纳米物体的非侵入性3DX射线成像,例如集成电路 (IC),通常需要广泛的图解和断层扫描.
- 这种多角度数据采集是耗时的,限制了材料科学和半导体检查的吞吐量.
研究的目的:
- 开发一种基于机器学习的方法,即注意力皮电图 (APT),以加速ICs的3DX射线成像.
- 为了减少对断层扫描重建所需的角扫描,而不会影响图像保真度.
主要方法:
- 在Ptycho-Tomographic重建的机器学习框架内,APT使用了轴向自我注意力.
- 该模型使用基于典型的IC模式和X射线物理学的调节先验进行训练,从而从不完整的角度数据进行重建.
- 物理辅助的深度学习整合了对IC结构和X射线相互作用的先前知识.
主要成果:
- APT实现了与传统方法 (SART) 相比的重建保真度,使用的角度显著减少 (×12减小).
- 在相同的缩小角度设置下,APT的性能优于FBP,SIRT和SART等传统算法.
- APT将复杂IC的总数据采集和计算时间从67.96小时减少到38分钟,这是一个显著的加速.
结论:
- 注意型Ptycho-Tomography提供了一个高效和准确的方法,用于纳米结构的3DX射线成像.
- 该框架能够在大幅减少扫描时间的情况下进行重建,这对半导体分析和其他纳米级成像领域有广泛的影响.
- 这种以物理辅助,基于注意力的机器学习方法适用于材料科学和生物成像中的应用.
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