Some volumes on `spider-challenge-2023` have wrong spacing and strange dimensions.

A lot of volume spacings look weird, here's the three most flagrant examples :

sub-221_acq-lowresSag_T1w
sub-186_acq-lowresSag_T1w
sub-058_acq-lowresSag_T2w 

Here an image of the visualisation (take a look at the spacing / dimensions) :

<img width="894" height="1253" alt="Image" src="https://github.com/user-attachments/assets/e10a426b-2e80-461e-a114-2663950e1767" />