[vtkusers] vtkResliceImage and appending slices

[zarko.milosevic]

So you think that I can consider dimensions of entities on sliced oblique image as accurate ? For example, if I measure diameter of blood vessel  on oblique sliced image that diameter should have correct dimensions ?

 

From: David Gobbi [via VTK] [mailto:ml-node+s1045678n5729502h93 at n5.nabble.com] 
Sent: Wednesday, November 19, 2014 12:15 AM
To: zarko.milosevic
Subject: Re: vtkResliceImage and appending slices

 

On Tue, Nov 18, 2014 at 4:09 PM, zarko.milosevic <[hidden email]> wrote:

When 3d image is sliced with arbitrary, oblique slice than all sliced voxels would not have same spacing. Right ? But if I assume some output spacing then I will get inaccurate dimensions.

 

Whatever output spacing you set, vtkImageReslice will take it into account when it does the reslicing.

 

 

 

From: David Gobbi [via VTK] [mailto:[hidden email] <http://user/SendEmail.jtp?type=node&node=5729501&i=0> ] 
Sent: Tuesday, November 18, 2014 11:56 PM
To: zarko.milosevic
Subject: Re: vtkResliceImage and appending slices

 

On Tue, Nov 18, 2014 at 3:40 PM, zarko.milosevic <[hidden email] <http://user/SendEmail.jtp?type=node&node=5729500&i=0> > wrote:

Hi David again,

It`s been a while. I`m getting back to the same problem. If I put my own
spacing for the output image then the resulted image will have wrong
dimensions. If i try to measure something on the resulted oblique sectioned
image those measures will not be realistic. Am I right ?

 

If you set the output voxel spacing, then you _know_ the output voxel spacing.

And in fact VTK knows the output voxel spacing too, because it is stored with

the vtkImageData.

 

You are always taking the voxel spacing into account when you are making

your measurements, aren't you?  If you do so, then all the measurements

should be accurate.

 

 - David 

 


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