Okay, so welcome to the Monday session, just 45 minutes on medical image processing.

And now I have the first problem here is the pencil.

So we are now digging into a new chapter.

And that is basically on cardiac imaging.

Cardiac imaging is a very, very important field for interventional image processing.

Because in cardiac imaging, you know, you have moving heart, you have unknown motion,

and the circumstances are rather difficult.

And open surgery is usually not a good option if somebody has a heart problem because to

open the thorax and all the related issues are rather tough.

And last Tuesday, we started to look into one problem that is very important and that's

the atrial fibrillation.

And that's the jittering of the heart and its irregular beating.

And what you can do in such a situation using interventional techniques is you can bring

special catheters and you can more or less destroy some tissue in the inner of the heart

and hope and the doctor hopes that the problem is fixed by then.

We have seen a few videos how these catheter procedures work.

And also we have discussed, you know, the different diseases that are related to that.

About treatment, we talked a little bit about using pharmaceutical elements, how to use

heart surgery and the more important thing for the image processing researcher is the

catheterization, where basically a catheter is in the inner of the vessels and all the

control of this catheter is basically driven by image information that is provided by us,

you know, those guys who built the system or who are supposed to build the system.

And this is wrong here, that's already fixed in the final slides for a pacemaker, you do

not need an open heart surgery.

So we have seen the catheter, how the catheter looks like and for us it's important that

this catheter has an elliptic structure.

Still too fat here, I have to reduce the size to small and now you don't see it anymore,

right, the point here.

A little arrow or something like that would have been or would be nice here.

Let me just check whether I find something here.

Hey, but no I cannot write, okay.

That's cool.

Maybe one solution is that I just write on the slides.

So we have here an elliptic structure, so here you see the ellipse and if we now capture

with our C-ARM system two images from two different directions of the ellipse here,

we can look at the projection images, we get here an ellipse and here an ellipse and the

question is how can I compute out of the 2D projections the 3D structure of the ellipse.

That's a very concrete problem and a very important problem for the practical application.

And if you surf the web to find these catheters, I mean it's very interesting to sit with a

glass of wine, your girlfriend is watching some TV show, Desperate Housewives or something

like that and you can have your computer and surf the web and look for things like catheters

and companies who build catheters.

Very interesting.

What type of catheters exist, very, very interesting.

It's also interesting to know if you go to a conference on interventional medicine or

interventional imaging, usually the companies who build the catheters invite doctors for

dinner and so on.

So there seems to be a lot of money involved, maybe even much more than with the devices

to visualize these things.

So the catheter business is quite a strong business and it seems that there is a lot