Micro-CT tomographic data set of 38 mummy labels from the BNU in Strasbourg (2/2)

Summary This submission contains a tomographic dataset of 38 mummy labels from the BNU in Strasbourg used to perceive the anatomical identification possibilities of the woods used for mummy labels and to carry out ring width measurements. The data will be made available as part of [Blondel et al., 2024]. Apparatus The dataset is acquired using the EasyTom 150/160 X-ray tomograph (RX Solutions). This tomograph is equipped with a sealed X-ray generator with a compact tube and an interchangeable-plane sensor fitted with a CsI scintillator. The CT scanner parameters for the session carried out on the mummy labels were set at 90 Kv with an intensity of 195 mA for an acquisition resolution varying between 11 and 42 µm with 2016 projections (that is about 20 images on average per projection) with a frame rate of 12,5 and a temperature of 28°C. Each image was then reconstructed by filtered retroprojection using the XAct software (RX Solutions). Information on placing mummy labels in the tomograph The installation of the mummy labels was the same for all the different labels, some of which varied in size. They were attached to a plastic clamping vice-type support covered in expanded foam to prevent the labels from being marked during clamping, before being placed on the tomograph's rotating platform. Issues relating to the data collected The data collected for this study were carried out to perceive the possibilities of anatomical identification from tomographic images in the transverse plane. The tangential and radial planes were not of sufficiently high resolution due to the dimensions of the mummy labels, see details in [Blondel et al., 2024]. The other objective was to use tomographic imagery to facilitate the acquisition of ring widths in the transverse plane of mummy labels. The mummy labels were not tomographed in their entirety. Only the central part, a few centimetres high, was tomographed to maximise resolution. The number of projections and the resolution per label are specified in table form in [Blondel et al., 2024], as they vary according to the width and thickness of the mummy labels. All raw tomography image data (i.e. without corrections) are available in .tif format. The post-processing steps are described in the methodology of [Blondel et al., 2024]. List of Contents The content of the submission is divided into 38 data sets corresponding to the 38 mummy labels. Each set is labelled with the inventory number of the BNU mummy label and its resolution. Each set contains:- all the images of the transverse plane in .tif format, the number of projections of which varies from one label to another depending on the resolution of the acquisitions, see details in [Blondel et al., 2024].- The .xls file containing a summary of the scanner metadata for each of the mummy labels.- The three images processed in the transverse plane for each label, including those used to measure ring width for the 7 labels for which ring width measurement was possible, as presented in [Blondel et al., 2024].- Colour photographs of the front and back of each tomographed mummy label including those on which ring width measurements were taken on their surface, unless otherwise stated[1]. All these photographs are marked: Coll._et_photogr._BNU_Strasbourg_OpenLicence, accompanied by the inventory number. Acknowledgments We would also like to thank engineers Damien Favier and Antoine Egele from the Charles Sadron Institute for their work on the tomographic acquisitions carried out on the 38 mummy labels. [1] The photographs of the front and back of mummy label HO255 are not available, as they are currently being studied.摘要 本提交数据集包含来自斯特拉斯堡BNU的38件木乃伊木质标签的断层扫描数据集，旨在探究用于制作木乃伊标签的木材的解剖学识别可能性，并开展年轮宽度测量工作。本数据集将作为[Blondel等人，2024]的附属资料公开。 实验设备 本数据集采用EasyTom 150/160型X射线断层扫描仪（RX Solutions）完成采集。该断层扫描仪配备带有紧凑型X射线管的密封式X射线发生器，以及搭载碘化铯（CsI）闪烁体的可更换平面探测器。本次针对木乃伊标签的扫描会话参数设置如下：管电压90千伏，管电流195毫安，采集分辨率介于11至42微米之间，共采集2016幅投影图像（平均每个投影约20幅图像），帧率为12.5，环境温度控制为28摄氏度。随后通过XAct软件（RX Solutions）采用滤波反投影法完成每幅图像的重建。 木乃伊标签在断层扫描仪中的放置规范 所有待扫描的木乃伊标签均采用统一的安装方式，尽管部分标签尺寸存在差异。首先将标签固定于包覆有发泡海绵的塑料钳式支架上，以避免夹持过程中对标签造成损伤，随后将支架放置于断层扫描仪的旋转平台上。 采集数据相关说明 本研究采集的数据旨在探究通过横断面断层扫描图像实现解剖学识别的可能性。由于木乃伊标签的尺寸限制，其切向与径向平面的扫描分辨率未达到理想水平，详细说明参见[Blondel等人，2024]。本研究的另一目标是借助断层扫描图像，便于获取木乃伊标签横断面的年轮宽度数据。本次扫描并未覆盖所有木乃伊标签，仅采集了高度为数厘米的中央区域以最大化分辨率。各标签的投影数量与分辨率因木乃伊标签的宽度与厚度不同而存在差异，具体信息以表格形式呈现于[Blondel等人，2024]中。所有未经过校正的原始断层扫描图像数据均以.tif格式存储。后续处理步骤详见[Blondel等人，2024]的方法学部分。 数据集内容清单 本次提交的数据集包含38个子数据集，分别对应38件木乃伊标签。每个子数据集以该标签的BNU库存编号及其扫描分辨率进行命名，具体包含以下内容： - 所有横断面断层扫描图像（.tif格式），各标签的投影图像数量因采集分辨率不同而存在差异，详细说明参见[Blondel等人，2024]。 - 包含所有木乃伊标签扫描仪元数据摘要的.xls文件。 - 各标签的3幅横断面处理后图像，其中包括用于年轮宽度测量的7件标签的测量相关图像，具体内容详见[Blondel等人，2024]。 - 每件被扫描木乃伊标签的正面与背面彩色照片，涵盖所有可开展年轮宽度测量的标签表面照片，除非另有说明[1]。所有照片均标注有"Coll._et_photogr._BNU_Strasbourg_OpenLicence"字样，并附带对应的库存编号。 致谢 我们还要感谢查尔斯·萨德隆研究所的工程师达米安·法维耶（Damien Favier）与安托万·埃格勒（Antoine Egele），感谢他们为38件木乃伊标签的断层扫描采集工作提供的技术支持。 [1] 木乃伊标签HO255的正面与背面照片暂未公开，因其目前仍处于研究阶段。