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Bug 1325 - positive z-axis points downwards after ft_volumerealign

Reported 2012-02-13 10:18:00 +0100
Modified 2012-07-07 20:24:50 +0200
Product: FieldTrip
Component: core
Version: unspecified
Hardware: PC
Operating System: Linux
Importance: P3 normal
Assigned to: Jan-Mathijs Schoffelen
Depends on: 1295
See also:

Stan van Pelt - 2012-02-13 10:18:55 +0100

when using ft_volumerealign to realign an anatomical MRI to CTF coordinates, the z-axis points downwards occasionally (i.e., in some subjects).

Jan-Mathijs Schoffelen - 2012-02-13 10:26:21 +0100

Hi Stan, Which particular structural MRI gives the problem? Could you provide details about where I can get the dicoms? I will then generate a mat-file for testing Does the problem persist after defining an auxiliary point (positive z-coordinate) in ft_volumerealign?

Stan van Pelt - 2012-02-13 11:25:18 +0100

(In reply to comment #1) the DICOMs can be found on /home/coherence/stavpel/Data/Attention/Att_final/attfinal01/attfinal01_MRI. The problem is resolved (only) when defining an auxiliary point (positive z-coordinate) in ft_volumerealign.

Jan-Mathijs Schoffelen - 2012-07-04 14:54:37 +0200

confirmed. It only works with a z-coordinate.