How can I slice head volume, given by mri slices of images, in half?

So, i have done the tutorial at

http://www.mathworks.com/help/techdoc/visualize/f5-3291.html

and now I just want to slice this head to half vertically or horizontaly.

I have tried with Slice Planes, but have no luck.

Thanks in advance.

[Image Analyst]

I don't understand. Do you just want to extract out the slice midway down your volume and display it? With or without one of the other half-volumes attached to it like in the demo? If so, I don't know why you can't figure out how to adapt it to indicate the slice you want. Or do you just want to get a new volumetric image that's half the volume of the original, like

lastSlice = floor(size(fullVolume, 3)/2);
halfVolume = fullVolume(:,:, 1:lastSlice);

Explain what you mean by you "want to slice this head to half".

[Tomislav]

Hi,

I will explain the full problem. I have to take two points from the edge of the head. One from the front, and one from the back. Done. Further, have to connect that dots with a line which penetrates the head. Done. And now i have to get slices again but this time i need to see where did that line penetrate each slice.

Next I have to repeat the same procedure, but this time take one point from somewhere inside the head and second on the outside. That is why I need to chop the head in the first place.

Thank you for your time.

[Tomislav]

btw, i would appriciate some more help about this, becouse solution mentioned in comment didnt worked for me.

Tnx