Dorr atlas blog (#399)

* automated target selection docs

* Dorr atlas blog

* delete automated target selection docs

* Update docs/source/blog/dorr-mouse-mri-atlas-added.md

Co-authored-by: Adam Tyson <[email protected]>

* Update docs/source/blog/dorr-mouse-mri-atlas-added.md

Co-authored-by: Adam Tyson <[email protected]>

* change image to 2d

* annotation and ref image

* Update docs/source/blog/dorr-mouse-mri-atlas-added.md

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Co-authored-by: Adam Tyson <[email protected]>

Author: saarah815

docs/source/blog/dorr-mouse-mri-atlas-added.md

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+---
+blogpost: true
+date: November 6, 2025
+author: Saarah Hussain
+location: London, England
+category: brainglobe
+language: English
+---
+
+# A new mouse MRI atlas been added to BrainGlobe
+[Dorr et al. (2008)](https://doi.org/10.1016/j.neuroimage.2008.03.037) created a high-resolution, three-dimensional MRI-based atlas of the adult C57Bl/6J mouse brain, providing  comprehensive anatomical coverage of the cerebrum, cerebellum, and brainstem. 
+
+The atlas was constructed from within-skull, T2-weighted MR images acquired at 32 μm isotropic resolution from forty 12-week-old mice scanned at 7T. Following normalisation, registration, and averaging of individual scans, 62 distinct brain structures were manually delineated.
+
+This atlas is now available through BrainGlobe as `dorr_mouse_mri_32um`.
+
+![Dorr atlas annotations](images/dorr_annotation_and_reference.png)
+
+**Figure 1. Two-dimensional view of the Dorr mouse MRI brain atlas: annotations (left) and reference (right).**
+
+## How do I use the new atlas?
+You can use the Dorr mouse MRI atlas like all other BrainGlobe atlases. To visualise the atlas, you could follow the steps below:
+* Install BrainGlobe ([instructions](/documentation/index)).
+* Open Napari and follow the steps in our [download tutorial](/tutorials/manage-atlases-in-GUI.md) for the `dorr_mouse_mri_32um` atlas.
+* Run `napari -w brainrender-napari` and visualise the different parts of the atlas as described in our [visualisation tutorial](/tutorials/visualise-atlas-napari).
+
+The end result will look something like Figure 2.
+
+![Dorr atlas visualised in napari](images/dorr_brainrender_visualisation.png)
+
+**Figure 2: The Dorr mouse MRI atlas visualised with `brainrender-napari`.**
+
+## Why are we adding new atlases?
+A fundamental aim of the BrainGlobe project is to make various brain atlases easily accessible by users across the globe. If you would like to get involved with a similar project, please [get in touch](/contact).