Recent Update Log

October 2026

Added T1w distortion correction ([Corrections][T1w Distortion Correction…], correct_by_t1w) for AP–PA acquisitions without reverse-phase data. It replaces the previous T2w-based correction; correct_by_t2w remains as an alias.

September 2026

Improved AI-agent interaction and visualization controls, including more reliable chat/session updates and tract/region metric coloring.
Corrected the intersect volume calculation in the tract-to-region connectome. In earlier versions, the value was divided by voxel volume instead of multiplied, so the absolute intersect-volume value is incorrect when voxel volume is not 1 mm³. This affects only the absolute scale; relative trends and comparisons are not affected.

August 2026

Expanded AI Agent automation with Fiber Data Hub access, connectometry commands, command-history replay/batch processing, and broader tract/rendering control.
Expanded Linux distribution support with universal x86-64 and ARM64 CPU/CUDA builds and broader compatibility testing across Linux releases.

July 2026

Released the Sun generation of DSI Studio. The current release is 2026.7.25.
Added AI Agent integration for Codex and Claude Code. The agent can inspect the current DSI Studio state and operate workflows such as reconstruction, fiber tracking, image processing, and connectometry from natural-language requests.

May 2026

Added U-Net based segmentation in DSI Studio for structural MRI.
Added support for compact segmentation models for T1w/T2w images, allowing users to run brain MRI segmentation directly in DSI Studio without installing Python, PyTorch, or external segmentation packages.
Improved the segmentation workflow so that model selection, inference, and output label generation can be handled within the DSI Studio interface.

April 2026

March 2026

Revised the automatic fiber tracking function by reducing the default TIP iteration count and adding debugging features.
Added a comprehensive set of tract-to-region connectome quantification outputs.

Issues

Please check whether your version is affected by the following issues and update accordingly.

[versions >= 08/08/2025 <= 08/11/2025] A bug affected automatic fiber tracking and QSDR reconstruction, causing them to fail.
[versions >= 06/04/2025 <= 06/20/2025] A bug may cause crashes when making SRC files isotropic. Another bug may create corrupted .sz and .fz files when saving. Any affected .sz and .fz files should be removed.
[versions >= 04/15/2025 < 05/06/2025] Converting DICOM files to NIfTI may create left-right mirrored T1w images.
[versions >= 02/01/2025 <= 03/10/2025] AutoTrack may produce incorrect results due to a normalization error.
[versions < 05/01/2025] Bug fixes include: (1) medial lemniscus tracts were incorrectly treated as MNI-space tracts, (2) a multithreading error may cause incorrect tract statistics in the connectometry database, and (3) a bug may cause alignment problems between .tck files and structural images.

2025

Added issue checking, the multi-metric database .dz format, QA-ISO ratio (QIR), command-line T1w tissue segmentation, and support for NDA restricted datasets.
Improved differential tractography, connectivity matrix computation, image registration, mask generation, multithreading efficiency, FIB averaging, bias field correction, and phase-distortion correction using T2w images.
Updated correlational tractography p-value estimation, the Julich Brain atlas, built-in neonate template, and ICBM152 T1w/T2w templates.
Added command history, empty-tract save/load support, expanded tract-to-region metrics, and restored --action=vis.

2023-2024

Introduced the Hou generation of DSI Studio with new .fz/.sz formats, the DSI Studio Data Hub, updated registration tools, and a revised GUI.
Updated tractography atlas organization and automated fiber tracking support for multiple tractography atlases.

2020-2022