A Large Open Access Dataset of Brain Metastasis 3D Segmentations on MRI with Clinical and Imaging Feature Information

We present a dataset of 200 patients with pathological or clinical diagnosis of metastases to the brain. The dataset contains pretreatment T1, T1 post-contrast, T2, and FLAIR MR images in NifTI format along with a NifTI file of manual segmentation masks for each patient. The segmentation masks include peritumoral edema, contrast-enhancing tumor, and necrotic tumor. There are a total of 975 contrast-enhancing lesions, many of which are sub centimeter. An excel sheet of the following clinical and imaging information is also included: age at diagnosis, sex, ethnicity, smoking history, primary tumor origin, presence of extranodal metastasis, survival time, presence of infratentorial involvement, and number/volume of lesions with contrast-enhancement, necrosis, and peritumoral edema.