[Vv] Usage of Window/Level, and fusion of different modality, say, MRI, US?

[Vivien Delmon]

On 10/08/2013 09:08 AM, qi tian wrote:
> Hi
>
> Anyone has used vv to fuse two images of different modalities?
> I am trying to fuse MRI and US images, because the voxel
> intensity range are rather different: MRI image voxel intensity
> can be as high as 1000 while US is less than 100.
>
> When I load US as overlay, it is too dark to see, wonder if
> I need to normalize intensities of two images before
> using vv to fuse? Or is it possible to use two window/level
> setups for MRI and US individually.

Hi Tian,

You can use the overlay functionality, then:
- go in the overlay tab
- uncheck the window/level link box (that link the window/level of both 
images)
- set the window level of the overlay manually or use ctrl+w which will 
try to find the best window/level for the overlay using a little part of 
the image under your mouse.

Most of these functionalities are listed if you press F1

-- 
Vivien Delmon
PhD student at CREATIS, Lyon
Supported by ANRT and ELEKTA
http://www.creatis.insa-lyon.fr/rio