BraTS 2021脑肿瘤分割数据集先容

一、背景先容

                         脑肿瘤分割挑衅赛（brain tumor segmentation challenge，BraTS Chanllenge）是国际医学图像计算和计算机辅助干预协会(Medical Image Computing and Computer Assisted Intervention Society，MICCAI）全部比赛中历史最悠久的，已经一连办了10年，是医学图像处置惩罚范畴最热门的比赛之一。
  2017年及之后的每届挑衅赛均包含三个数据集，分别是训练集（Traning data）、验证集（Validation data）和测试集（Test data）
  可以通过官方渠道和Kaggle下载训练集的图像和标签、验证集的图像，地点在文末。验证集标签不公开，但可以在官方平台上传推理结果，平台自动打分。测试集仅在比赛时间内向选手开放下载。
  表1 BraTS挑衅赛积年纪据规模
     

年份	总病例数	训练集病例数	验证集病例数	测试集病例数
2012	50	35	无	15
2013	60	35	无	25
2014	238	200	无	38
2015	253	200	无	53
2016	391	200	无	191
2017	477	285	46	146
2018	542	285	66	191
2019	626	335	125	166
2020	660	369	125	166
2021	2040	1251	219	570

    二、数据形貌

  BraTS每个病例包含四个模态的磁共振成像（Magnetic Resonance Imaging，MRI），每个模态的维度为240×240×155（L×W×H）
  四种模态：
  

• T1
  

  T1成像，利于观察解剖结构，病灶体现不敷清楚
  

• T1ce
  

  在受试者做磁共振之前向血液内注射造影剂，使成像中血流活跃的地域更加显着，是增强肿瘤的重要判据
  

• T2
  

  T2成像，病灶体现较为清楚，判定整颗肿瘤
  

• FLAIR
  

  T2压水像（抑制脑脊液的高信号），含水量大则更亮眼，可以判定瘤周水肿地域
                         <blockquote class="kdocs-blockquote" style="text-align:left;">   图片来自BraTS2021_00068号样本    三、标签形貌

  label 0：背景（background）
  label 1：坏死肿瘤核心（necrotic tumor core，NCR）
  label 2：瘤附近水肿地域（peritumoral edema，ED）
  label 4：增强肿瘤（enhancing tumor，ET）
                         比赛要求按地域进行分割，终极需辨认出三个子地域：整颗肿瘤（包罗label1、2、4）、肿瘤核心（包罗label1、4）以及增强肿瘤（只包罗label4）
  四、评价指标

  赛会官方给出了两个评价指标，dice分数和豪斯多夫间隔。此中，Dice分数比豪斯多夫间隔更重要。
  

• Dice分数
  

  权衡两个聚集的重合程度，是判定推测区间与Ground truth符合程度的重要指标
                         公式为：
  
  

• Hausdorff间隔（HD95）
  

  度量两个点集间的间隔，判定推测边沿与真实边沿的差距
                         公式为：
  
  五、相关链接

  a. 官网链接：BraTS Continuous Evaluation
  注册后可下载BraTS 2021 Traning data的图像和标签以及Validation data中的图像。详情请点击链接，有详细的加入教程。
  b. Kaggle：BRaTS 2021 Task 1 Dataset
  注册后可下载BraTS 2021 Traning data的图像和标签
  c. 赛会原论文：The RSNA-ASNR-MICCAI BraTS 2021 Benchmark on Brain Tumor Segmentation and Radiogenomic Classification

来源：https://blog.csdn.net/CarryEKAIruiui/article/details/129405809
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