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You can view and download these images on the Cancer Imaging Archive by selecting the TCGA-GBM collection. If you are unsure how to download this Collection view our quick guide on Searching by Collection or you can refer to our The Cancer Imaging Archive User's Guide for more detailed instructions on using the site.
CIP TCGA
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Radiology Initiative
The Cancer Imaging Program has begun multiple projects to collaborate with the academic community to encourage cross disciplinary research which utilizes the data provided in these resources. Much more can be learned about this effort on the TCGA Glioma Phenotype Research Group page.