Cone-Beam Computed Laminography Dataset of a Keyboard Circuit Board

Summary This dataset contains X-ray projection images of a keyboard circuit board acquired using a cone-beam computed laminography (CBCL) scanner. The dataset also includes the corresponding .pca metadata file, which contains the essential scanning parameters required for image reconstruction. Description Sample Information: The sample is a section of a keyboard circuit board that was affixed to a flat carbon panel using transparent plastic tape to ensure stability during the scanning process. Maximal dimensions of the circuit board are 39 x 25 x 3,5 mm. Scanner: The computed laminography was performed using a Phoenix Microme|x Neo scanner from Waygate Technologies. The inspection was managed using the Phoenix|x-ray x|act software, with scanning performed using its PlanarCT module. This scanner is equipped with flat panel detectors and utilizes a cone-beam geometry for the X-ray source. The scanner is capable of scanning at 45- and 60-degree tilt angles and is located at the LUT School of Energy Systems (LES) at the Lappeenranta campus of Lappeenranta-Lahti University of Technology LUT. For more technical specifications and details on the scanner, please refer to the Waygate Technologies product page: https://www.bakerhughes.com/waygate-technologies/industrial-radiography-and-ct/electronics-xray-inspection-axi/micromex-nanomex-neo Scan Settings: The scan was conducted at a 45-degree tilt angle. The object was rotated 360 degrees horizontally on the carbon panel to acquire a full set of projections. The X-ray source was operated at a voltage of 100 kV and a current of 80 µA, resulting in a total power of 8 W. The detector exposure time was set to 200 ms, and a total of 758 projection images were acquired. To ensure accurate data acquisition, several calibrations were performed before the scan. First, the center of rotation was precisely determined. Following this, the manipulator was calibrated, which involved establishing the exact position of the manipulator's axis relative to the detector. Finally, the detector was calibrated by performing flat-field and dark-field corrections. This process determines the offset image, the gain image, and the mean free ray gray scale value. More information about the scan settings can be found from the .pca metadata file. Abbreviations in the metafile: FOD: Focus-to-Object Distance in mm (same as Source-to-Origin Distance) FDD: Focus-to-Detector Distance in mm (same as Source-to-Detector Distance) Tilt: Angle of the X-ray source relative to the object's axis of rotation in degrees NumberImages: Total number of projection images (angles) DimX: Horizontal pixels of the projection DimY: Vertical pixels of the projection PixelsizeX: Detector pixel width in mm PixelsizeY: Detector pixel height in mm TimingVal: Exposure time of the detector in seconds Voltage: Voltage of the source in kV Current: Current of the source in µA FreeRay: Initial X-ray photon intensity determined by the scanner software Research Group The dataset was produced by the Applied Mathematics Research Unit in the Department of Computational Engineering at LUT University, Finland: https://www.lut.fi/en/research-groups/applied-mathematics-0 Additional Links For processing this dataset and performing reconstructions, we recommend using the Core Imaging Library (CIL), an open-source framework for tomographic image reconstruction. A practical example of working with CBCL data using CIL can be found in this Jupyter notebook: https://github.com/TomographicImaging/CIL-Demos/blob/main/demos/2_Iterative/05_Laminography_with_TV.ipynb Contact Details For more information about the dataset, please contact Tommi Heikkilä at tommi.heikkila[at]lut.fi or Toni Karvonen at toni.karvonen[at]lut.fi.概述 本数据集包含采用锥束计算层析成像（cone-beam computed laminography, CBCL）扫描仪采集的键盘电路板X射线投影图像，同时附带对应的.pca元数据文件，该文件包含图像重建所需的核心扫描参数。 数据集说明 样本信息： 本次样本为一段键盘电路板，为确保扫描过程中的稳定性，采用透明塑料胶带将其固定于平面碳板上。该电路板的最大尺寸为39 × 25 × 3.5 mm。 扫描仪信息： 本次计算层析成像扫描采用的是Waygate Technologies旗下的Phoenix Micromex Neo扫描仪。扫描检测工作通过Phoenix|x-ray x|act软件完成，并使用其PlanarCT模块执行扫描。该扫描仪搭载平板探测器，X射线源采用锥束几何构型，支持45°与60°倾斜扫描角度，部署于芬兰拉彭兰塔-拉赫蒂理工大学（Lappeenranta-Lahti University of Technology, LUT）拉彭兰塔校区能源系统学院（LUT School of Energy Systems, LES）内。 如需了解该扫描仪更多技术规格与详细参数，请参阅Waygate Technologies官方产品页面：https://www.bakerhughes.com/waygate-technologies/industrial-radiography-and-ct/electronics-xray-inspection-axi/micromex-nanomex-neo 扫描设置： 本次扫描采用45°倾斜角度。将样本在碳板上水平旋转360°以采集完整的投影图像集。X射线源工作电压设为100 kV，电流设为80 µA，总功率为8 W。探测器曝光时长设置为200 ms，共采集758张投影图像。 为确保数据采集精度，扫描前开展了多项校准工作：首先精确确定旋转中心；随后对机械臂进行校准，即明确机械臂轴线相对于探测器的精确位置；最后通过平场与暗场校正完成探测器校准，该流程可得到偏移图像、增益图像以及平均自由射线灰度值。有关扫描设置的更多详细信息，请参阅.pca元数据文件。 元数据文件缩写说明： FOD：焦距至物体距离（单位：mm，与源至原点距离同义） FDD：焦距至探测器距离（单位：mm，与源至探测器距离同义） Tilt：X射线源相对于样本旋转轴的倾斜角度（单位：°） NumberImages：投影图像（角度）总数量 DimX：投影图像水平像素数 DimY：投影图像垂直像素数 PixelsizeX：探测器像素宽度（单位：mm） PixelsizeY：探测器像素高度（单位：mm） TimingVal：探测器曝光时长（单位：s） Voltage：X射线源工作电压（单位：kV） Current：X射线源工作电流（单位：µA） FreeRay：扫描仪软件确定的初始X射线光子强度 研究团队： 本数据集由芬兰拉彭兰塔-拉赫蒂理工大学计算工程系应用数学研究单元制作：https://www.lut.fi/en/research-groups/applied-mathematics-0 补充链接： 为处理本数据集并完成图像重建，我们推荐使用核心成像库（Core Imaging Library, CIL），这是一款用于断层图像重建的开源框架。利用CIL处理CBCL数据的实操示例可参阅该Jupyter Notebook：https://github.com/TomographicImaging/CIL-Demos/blob/main/demos/2_Iterative/05_Laminography_with_TV.ipynb 联系方式： 如需了解本数据集更多相关信息，请联系Tommi Heikkilä（邮箱：tommi.heikkila[at]lut.fi）或Toni Karvonen（邮箱：toni.karvonen[at]lut.fi。