A multicenter dataset for lymph node clinical target volume delineation of nasopharyngeal carcinoma

We retrospectively collected 440 computed tomography (CT) images from 262 patients with different imaging modalities, disease stages and treatment strategies. To protect the patients' private information, we first blurred the face region and removed all metadata about clinical and personal. Then, all files are stored with the format NIfTI-1 (32-bit floating point). Each cohort is stored as a folder and named "Internal\_Cohort", and "Testing\_Cohort\_X" ("X" is from 1 to 4), Raw CT images in the training or testing sets are stored in the "imagesTr" or "imagesTs" folders of each cohort with the name "lnctvseg\_cx\_xxxx\_yyyy.nii.gz", respectively, where "cx" denotes the center number x is the digit number from 1 to 4, "xxxx" is the index number of each patient the range is 1 to the total number of patients in "cx", "yyyy" is set to "0000" (non-contrast CT) or "0001" (contrast-enhanced CT). The corresponding labels are stored in the "labelsTr" and "labelsTs" folders with the name "lnctvseg\_cx\_xxxx.nii.gz", respectively.

本研究回顾性收集了262例具有不同成像模态、疾病分期及治疗方案的患者的440幅计算机断层扫描（CT）图像。为保护患者隐私信息，研究团队首先对图像中的面部区域进行模糊化处理，并移除了所有临床与个人相关的元数据。随后所有文件均采用NIfTI-1（32位浮点）格式存储。所有数据集队列均以文件夹形式组织，分别命名为「Internal_Cohort」与「Testing_Cohort_X」（X取值范围为1至4）。训练集与测试集的原始CT图像分别存储于各队列的「imagesTr」与「imagesTs」文件夹内，文件命名格式为`lnctvseg_cx_xxxx_yyyy.nii.gz`；其中，`cx`代表扫描中心编号，取值为1至4的整数，`xxxx`为患者索引编号，取值范围为1至对应中心的总患者数，`yyyy`用于区分扫描类型，设为「0000」时代表平扫CT，「0001」时代表增强CT。与之对应的标注标签分别存储于「labelsTr」与「labelsTs」文件夹中，文件命名格式为`lnctvseg_cx_xxxx.nii.gz`。