[Announcements] Important Bug Report for Landmarker

[support at mristudio.org]

Dear MriStudio users,



Recently, it came to our attention that there is a bug in the registration
algorithm of Landmarker. It is related to the tensor re-orientation and affects
the tensor/vector data after tensor transformation. As a result, the vector data
can not be used for fiber tracking. The bug does not affect scalar values such
as FA and eigen-values generated from the transformed tensor data. We have fixed
the bug and uploaded the updated version on the server for you to download.
Below, we copied the description in the "ChangeLog" in the site. We are sorry
for this inconvenience and hope this bug will not affect your research
significantly. Should you have any questions, please contact us.



Sincerely,



Susumu Mori



ChangeLog Description:


IMPORTANT:

A bug was found in the tensor / vector reorientation algorithm of all the
previous Landmarker versions, Version 1.0.1, Version 1.1.1, Version 1.1, Version
1.2 and Version 1.3.

1) A bug affects the linear and non-linear registration of tensor data (*.d).

2) When the transformation involves shearing operations, the tensor orientation
was not properly re-oriented.

3) This affects tractgraphy after registration.

4) This does not affect scalar values such as FA, ADC, and eigenvalues.

5) We strongly encourage you to download Version 1.4 and reprocess your
registered images. For the reprocessing, you simply need to reapply the stored
transformation matrices using the new version (Version 1.4) because
transformation matrices are not affected by the bug.