Hi Tamara, 

first you need to make sure that this is not just a viewing setting, so in 
freeview copy the brightness setting to all inputs (there is buttons for that, 
like copy setting and apply to all, underneath the list of images). 

If you still see differences, check the original inputs. If they don’t show 
this, then it is something in our stream and I would need to look into it. If 
they do, then you need to figure out why that is the case. Make sure 
acquisition protocols and scanners are exactly the same for both time points.

Best, Martin

> On Dec 8, 2016, at 11:09 PM, Tamara Tavares <ttav...@uwo.ca> wrote:
> 
> Hello,
> 
> I am in the process of checking the alignment of my participant's baseline 
> and followup scans to the template scan using the norm.mgz files. I notice 
> that sometimes the image appears brighter in the first scan vs. the second 
> follow up scan. Is this problematic? I don't see any clear distortions or 
> translations when I compare the participant's scan to the template.
> 
> Thank you in advance for your help!
> Tamara
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