Supplemental Materials: Deep denoising for multi-dimensional synchrotron X-ray tomography without high-quality reference data
Supplemental Materials: Deep denoising for multi-dimensional synchrotron X-ray tomography without high-quality reference data
复制标题
补充材料：在没有高质量参考数据的情况下对多维同步加速器 X 射线断层扫描进行深度去噪
DOI：
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发表时间：
2021
期刊：
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通讯作者：
K. Batenburg
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作者：
A. Hendriksen;Minna Bührer;Laura Leone;M. Merlini;N. Viganò;D. Pelt;F. Marone;M. Michiel;K. Batenburg
X射线层析成像数据集是在瑞士维利根保罗·谢勒研究所(PSI)的瑞士光源(SLS)的Tomcat光束线上获得的。此外，在法国格勒诺布尔欧洲同步加速器(ESRF)的ID15A光束线上获得了X射线衍射层析成像(XRD-CT)数据集。静态X射线3D微断层摄影术数据是在TOMCAT BEAMLINE 1上获得的，并公开可用2。数据集包含1001张投影图像，大小为2.75μm，大小为1100×1440平方像素，角度范围为180°，采集时间为1s，曝光时间为1ms，多色光束的平均能量为30keV。动态X射线微层析成像这一数据集是在TOMCAT BEAMLINE 1上获得的，并公开可用2。每0.1s执行一次完全扫描，得到一个跨越大约32秒的180个时间步长的数据集，分为三个6s块，中间有7s停顿。每个时间步长包含300个投影图像，角度范围为180°，大小为2.75μm的1100×1440平方像素，多色束的平均能量为30keV。记录的角度增量为π/300弧度，与每半转300张投影图像的采集结果一致2。在这种情况下，我们观察到了一个小的偏差。角度增量为π/299.924，可通过目测多个时间步长的组合GRIDREC重建确定最多5位有效数字。用单色铅笔束(能量90keV)在ID15A光束线上进行了X射线-CT高能X射线衍射测量。数据采集为3个水平切片，间隔7 mm，每个切片采集时间为20分钟。采集在12 mm的扫描范围内以273个平移步长进行，在180°的角度范围内以225个旋转步长进行。使用pyFAI库3从获取的图像计算正弦图。选择了正弦图形的一个子集，包含3个水平切片，每个切片有11个通道。使用ASTRA-TOOLBOX4用谢普-洛根过滤器计算显示的FBP重建。
X-ray tomography datasets were acquired at the TOMCAT beamline at the Swiss Light Source (SLS) at the Paul Scherrer Institut (PSI), Villigen, Switzerland. In addition, an X-ray diffraction tomography (XRD-CT) dataset was acquired at the ID15A beamline at the European Synchrotron (ESRF), Grenoble, France. Static X-ray 3D micro-tomography The data was acquired at the TOMCAT beamline1, and is publicly available2. The dataset contained 1001 projection images across an angular range of 180° measuring 1100×1440 square pixels of size 2.75 μm. The acquisition took 1s, the exposure time was 1ms, and the mean energy of the polychromatic beam was 30keV. Dynamic X-ray micro-tomography This dataset was acquired at the TOMCAT beamline1, and is publicly available2. A full scan was performed every 0.1s, resulting in a dataset of 180 time steps spanning approximately 32 seconds, divided into three 6s chunks with 7s pauses in between. Each time step contained 300 projection images across an angular range of 180° measuring 1100×1440 square pixels of size 2.75 μm. The mean energy of the polychromatic beam was 30keV. The documented angular increment was π/300 radians, consistent with the acquisition of 300 projection images per half rotation2. We observed a small deviation in this case. The angular increment was π/299.924, which could be determined up to five significant digits by visual inspection of the combined GridRec reconstruction of several time steps. XRD-CT High-energy X-ray diffraction measurements were taken at the ID15A beamline using a monochromatic pencil beam (90keV energy). Data was collected of 3 horizontal slices, spaced 7mm apart, and acquisition of each slice took 20 minutes. Acquisition was performed in 273 translation steps over a scan range of 12mm and in 225 rotational steps over an angular range of 180°. Sinograms were computed from the acquired images using the pyFAI library3. A subset of the sinograms was selected, containing 3 horizontal slices with 11 channels each. The displayed FBP reconstructions were computed with the Shepp-Logan filter using the ASTRA-toolbox4.