MATLAB Central Newsreader - How to create 3D mesh model?

How to create 3D mesh model?

Tong — Tue, 14 Jul 2009 19:55:03 -0400

I have segmented meniscus images from MRI that is created in about 3mm slices. How would I combine these slices together to create a 3D model of the meniscus?

Re: How to create 3D mesh model?

Luigi Giaccari — Tue, 14 Jul 2009 20:49:03 -0400

Please send me that models of yours, I am plannig to build a surface recostructor for sliced cloud. Send to : giaccariluigi@msn.com

In the mean time look for:

http://www.mathworks.com/matlabcentral/fileexchange/22185
http://giaccariluigi.altervista.org/blog/

and related

Re: How to create 3D mesh model?

Brad Henrie — Fri, 17 Jul 2009 21:45:18 -0400

"Tong " <celticbaseball06@gmail.com> wrote in message <h3inqn$ni5$1@fred.mathworks.com>...
> I have segmented meniscus images from MRI that is created in about 3mm slices. How would I combine these slices together to create a 3D model of the meniscus?

First place all of your slices into a 3-d matrix. This will give you a cube of data. You can then view it from multiple planes by using this format variable(:,:,a) where a is the slice position in a direction directly into your displayed image. Using the same format you can display other planes variable(:,a,:). Converting your image to greyscale will allow you to display it using implay.

I'm sure that since you are working with MRI you have access to the image processing toolbox.

While viewing images in a plane where the pixels are not square you need to scale your image. (if you have a 3x3x5 voxel and display the 3x5 pixel representation) Also remember your slice separation if you don't have 3-d k-space.

Re: How to create 3D mesh model?

Image Analyst — Sat, 18 Jul 2009 04:02:35 -0400

"Tong " <celticbaseball06@gmail.com> wrote in message <h3inqn$ni5$1@fred.mathworks.com>...
> I have segmented meniscus images from MRI that is created in about 3mm slices. How would I combine these slices together to create a 3D model of the meniscus?
----------------------------------------
I'm not sure what you mean by "model," but you can combine 2D images together to form a 3D image by using the cat(3, slice1, slice2, slice3, slice4, slice5,......) function.

Re: How to create 3D mesh model?

Tong — Mon, 20 Jul 2009 18:36:02 -0400

"Image Analyst" <imageanalyst@mailinator.com> wrote in message <h3rhgr$of5$1@fred.mathworks.com>...
> "Tong " <celticbaseball06@gmail.com> wrote in message <h3inqn$ni5$1@fred.mathworks.com>...
> > I have segmented meniscus images from MRI that is created in about 3mm slices. How would I combine these slices together to create a 3D model of the meniscus?
> ----------------------------------------
> I'm not sure what you mean by "model," but you can combine 2D images together to form a 3D image by using the cat(3, slice1, slice2, slice3, slice4, slice5,......) function.

What about when I am using regions of interest, not images?

Re: How to create 3D mesh model?

fabio freschi — Mon, 20 Jul 2009 21:06:01 -0400

you can try iso2mesh in FE
fabio