SPIDER - Lumbar spine segmentation in MR images: a dataset and a public benchmark

This is a large publicly available multi-center lumbar spine magnetic resonance imaging (MRI) dataset with reference segmentations of vertebrae, intervertebral discs (IVDs), and spinal canal. The dataset includes 447 sagittal T1 and T2 MRI series from 218 studies of 218 patients with a history of low back pain. The data was collected from four different hospitals. There is an additional hidden test set, not available here, used in the accompanying SPIDER challenge on spider.grand-challenge.org. We share this data to encourage wider participation and collaboration in the field of spine segmentation, and ultimately improve the diagnostic value of lumbar spine MRI.
Which MRI studies are assigned to the training and validation sets can be found in the overview file. This file also provides the biological sex for all patients and the age for the patients for which this was available. It also includes a number of scanner and acquisition parameters for each individual MRI study. The dataset also comes with radiological gradings found in a separate file for the following degenerative changes:
1.    Modic changes (type I, II or III)
2.    Upper and lower endplate changes / Schmorl nodes (binary)
3.    Spondylolisthesis (binary)
4.    Disc herniation (binary)
5.    Disc narrowing (binary)
6.    Disc bulging (binary)
7.    Pfirrman grade (grade 1 to 5). 
All radiological gradings are provided per IVD level.

本数据集为一款公开可用的多中心大型腰椎磁共振成像（Magnetic Resonance Imaging, MRI）数据集，包含椎体、椎间盘（intervertebral discs, IVDs）及椎管的参考分割标注。该数据集涵盖218例腰痛患者的218项检查，共447组矢状位T1及T2加权MRI序列。数据采集自四家不同的医院。另有一套隐藏测试集未随本数据集一同发布，该测试集用于配套的SPIDER挑战赛，赛事网址为spider.grand-challenge.org。我们公开此数据集旨在推动脊柱分割领域的更广泛参与与协作，最终提升腰椎MRI的临床诊断价值。
训练集与验证集对应的MRI检查分配情况可查阅概述文件。该文件同时提供了所有患者的生物学性别，以及可获取年龄信息的患者的年龄数据。此外，还包含每项独立MRI检查的多项扫描仪及采集参数信息。本数据集还附带一份独立文件，其中收录了针对以下退行性改变的放射学分级结果：
1. 莫德奇改变（Modic changes，分为I型、II型或III型）
2. 上下终板改变/施莫尔结节（Schmorl nodes，二分类）
3. 腰椎滑脱（Spondylolisthesis，二分类）
4. 椎间盘突出（Disc herniation，二分类）
5. 椎间隙狭窄（Disc narrowing，二分类）
6. 椎间盘膨出（Disc bulging，二分类）
7. 皮尔曼分级（Pfirrman grade，1至5级）。
所有放射学分级结果均按椎间盘节段提供。