Thread Subject: image of head

I have brain data that I would like to overlay on an image
of a head. The head can be translucent and should be 3D so
that I can rotate the head in space and see structures
within. Can someone please tell me how or direct me to
references on how to create this type of head image. Thank
you, Jon Hauris

"Jon " <jon.f.hauris@baesystems.com> wrote in message
<fsudkj$ctq$1@fred.mathworks.com>...
> I have brain data that I would like to overlay on an image
> of a head. The head can be translucent and should be 3D so
> that I can rotate the head in space and see structures
> within. Can someone please tell me how or direct me to
> references on how to create this type of head image. Thank
> you, Jon Hauris

do you have two volumetric datasets that are of the same
head? if so, there are many examples of how to do this in
the functional mri literature. there is even a relevant
example in the matlab documentation. just look for "mri
image visualization" in the documentation, and you will find
something that will help. the help document title is
"Techniques for Visualizing Scalar Volume Data." this is
not exactly what you asked for, but a slight modification
will get you to what i think is your desired result.
basically, what you want is to draw a set of 'nested'
isosurfaces of your data, assuming they are registered (i.e.
in the same coordinate system). to do this, you will need
to find an 'isovalue' that gives you a good representation
of the surface of the head, and an isovalue that gives you a
good representation of the surface of the brain (or any
brain structure you wish to visualize). it would look
something like this:

p1 = patch(isosurface(headImage, headIsoValue),
'edgecolor','none','facealpha',.25); hold on

p2 = patch(isosurface(brainImage, brainIsoValue));


obviously you will want to modify the 'facecolor' properties
of p1 and p2 to suit your needs.

bryan

On Apr 1, 6:40=A0pm, "Jon " <jon.f.hau...@baesystems.com> wrote:
> I have brain data that I would like to overlay on an image
> of a head. =A0The head can be translucent and should be 3D so
> that I can rotate the head in space and see structures
> within. =A0Can someone please tell me how or direct me to
> references on how to create this type of head image. =A0Thank
> you, Jon Hauris
---------------------------------------------------
Jon:
Use Amira. It's the best volume visualization program available.
http://www.amiravis.com/

ImageAnalyst <imageanalyst@mailinator.com> wrote in message
<1c2cba86-7b52-428b-bae6-012d1cfbf662@b1g2000hsg.googlegroups.com>...
> ---------------------------------------------------
> Jon:
> Use Amira. It's the best volume visualization program
available.
> http://www.amiravis.com/

i most certainly agree... but it costs about $6K (USD)! not
that matlab is any cheaper (i am continually amazed at the
price of a commercial matlab licesne), i assume jon already
has matlab, and the cost of amira might make it unavailable.

bryan

On Apr 1, 9:32=A0pm, "Bryan " <cssm...@gmail.com> wrote:
> ImageAnalyst <imageanal...@mailinator.com> wrote in message
>
> <1c2cba86-7b52-428b-bae6-012d1cfbf...@b1g2000hsg.googlegroups.com>...
>
> > ---------------------------------------------------
> > Jon:
> > Use Amira. =A0It's the best volume visualization program
> available.
> >http://www.amiravis.com/
>
> i most certainly agree... but it costs about $6K (USD)! =A0not
> that matlab is any cheaper (i am continually amazed at the
> price of a commercial matlab licesne), i assume jon already
> has matlab, and the cost of amira might make it unavailable.
>
> bryan

You may or may not be right because of your assumption. That was an
assumption I didn't make. Because he didn't mention anything about
his budget I didn't make any assumptions about it. But I agree that
for most us $5-6k is not pocket change.