Dataset of deformed ultrasound images and signals under controlled indentation

Ultrasound imaging data (RF and scan-converted formats) of custom-made elastography phantoms. The data are robotically-acquired image sequences with controlled and gradually increasing phantom indentation.
The phantom consists of a background medium traversed by a cylindrical inclusion.
The data (images and RF signals) are contained in the 6 folders Acqui1 → Acqui6 corresponding to the 6 acquired image sequences on the phantom.
Each Acqui_i folder contains two subfolders: the RF folder containing RF signals in .mat file format (readable in Matlab), and the folder US_Image containing the images of the sequence in PNG format. Both images and RF signals are numbered, with each index corresponding to an indentation level and a force measured by the force sensor as outlined in the Excel file (Tabulation 1). Each RFi.mat file comprises 3152 rows representing the signal along the temporal axis, and 256 columns corresponding to the number of A lines in the image.
The Excel file has 5 tabs:
-The first tab contains, for each of the 6 acquired image sequences, the frame number in the sequence, the corresponding indentation of the probe (in mm), the recorded voltage value on the force sensor (V), and the corresponding calculated force value (N). Thus, each image in the 6 sequences is identified by a frame number, an indentation, and a force value.
-The second tab provide the acquisition parameters of the ultrasound images (frequency, depth, gain, etc.) performed using the SonixTablet ultrasound system from Ultrasonix (now bk medical).
-The third tab contains stress-strain curves, the mean, and the standard deviation of the Young's modulus for both the inclusion and the background of the phantom. The Young's modulus is obtained through compression tests conducted by an electromechanical testing machine (Bose, Electroforce 3200) on 10 small cylindrical samples taken from the background and the inclusion.
-The fourth tab contains the geometry and dimensions of the phantom.
-The fifth tab contains the recipe used to make the gelatin phantom.

本数据集为定制化弹性成像体模（elastography phantoms）的超声成像数据，包含射频（RF）格式与扫描转换格式两类文件。所有数据均为机器人采集的图像序列，体模的压入深度受控且逐步递增。
该体模由背景介质与贯穿其中的圆柱形夹杂组成。
图像与射频信号数据共分为6个文件夹，命名为Acqui1至Acqui6，分别对应体模上完成的6组采集图像序列。
每个Acqui_i文件夹均包含两个子文件夹：其中RF文件夹内为.mat格式的射频信号文件（可通过Matlab读取），US_Image文件夹内为序列图像，格式为PNG。图像与射频信号均已编号，每个编号对应一个压入深度等级与力传感器采集的力值，具体对应关系详见Excel文件中的表1。每个RFi.mat文件包含3152行与256列：行对应信号的时间轴维度，列对应图像中的A扫描线（A lines）数量。
Excel文件共包含5个工作表：
1. 第一个工作表：针对6组图像序列中的每一组，记录了序列内的帧编号、探头对应的压入深度（单位：mm）、力传感器采集的电压值（单位：V），以及通过计算得到的对应力值（单位：N）。因此，6组序列中的每张图像均可通过帧编号、压入深度与力值进行唯一标识。
2. 第二个工作表：记录了使用Ultrasonix（现隶属于bk medical）公司的SonixTablet超声系统采集超声图像时的各项参数，包括频率、扫描深度、增益等。
3. 第三个工作表：包含体模背景介质与圆柱形夹杂的应力-应变曲线、杨氏模量（Young's modulus）的均值与标准差。杨氏模量通过机电式试验机（Bose Electroforce 3200）对分别取自背景介质与夹杂的10个小型圆柱形试样进行压缩测试得到。
4. 第四个工作表：记录了体模的几何结构与尺寸参数。
5. 第五个工作表：记录了该明胶体模的制备配方。