BraTS-MET 2025 Data and other datasets are 3D images or 2D?
Which datasets are in 3D volumes? Could you let me know?
Created by Aruna V S ARUNA Hi @ARUNA ,
As a short and clarified answer, yes. All the MRI data for the BraTS challenges, including the metastasis challenge (METs), are 3D MRI volumes.
I believe the concepts of data acquisition, image reconstructions, and file formats are quite complicated and beyond the scope of this QA.
You may look the following short [instruction overview](https://encord.com/blog/dicom-and-nifti-comparison/)
/Mehdi Thank you, sir. Why I have this doubt is in the description; it is not mentioned as 3D volumes. So, I want to know whether the dataset was in the 2D array or 3D volumes.
If the file format is in .nii.gz or DICOM, then is it a 3D volume? Also, I have a question What is the file format for a 2D array of MRI images? Hi @ARUNA
Can you please specify what you mean by 2D images?
All the MRI datasets across different BraTS challenges are provided as standard 3D volumes in .nii.gz file format.
In general, as a practical clinical routine, it is quite common to acquire the MRI signals with higher resolution toward a certain orthogonal view (e.g axial).
Nevertheless, all the MRIs were preprocessed and, if necessary, co-registered and provided as standard 3D arrays.
You can find specific details for each task in the relevant Synapse [pages](https://www.synapse.org/Synapse:syn64153130/wiki/).
For example, here, you can find details for the [METs](https://www.synapse.org/Synapse:syn64153130/wiki/631058) challenge.
/Mehdi