The following content has been provided by the University of Erlangen-Nürnberg.
I get that all the possible to see it because you just need the time between, for example,
the QRS to move a little bit further for the next picture.
Yes, but then the overall procedure takes way longer than 30 seconds?
Yes, it should still be the same.
Why?
Because it takes 30 seconds for one to turn around.
Yes, but the...
The limit of the turning of the CT.
Okay, thanks for the question.
Let's continue, okay?
Okay.
Let's continue.
So, what you can do, and that's what he was actually asking in a certain sentence, we
have the following, we have here the rotation angle of the CM device, so we have 180 degrees
plus the angle of the perspective projection.
What was that?
Is there somebody on the roof?
Okay.
Okay.
And here we have the heart phase.
So, we say within this interval, for instance, we are between the PQ peak or something like
that in the ECG.
So, we can now consider two things, and your question was very smart, I have to say.
We have two things we have to deal with.
One is we need to have images that belong to the same heart phase.
So, we take our ECG and say, okay, at this peak, the heart is in this state, and for
this state, I collect data.
Okay?
And the other second force that we have to consider is we need to have a dense sampling
from very, very, or from most viewing directions.
So, we want to have this heart state we have selected, and we need projection images from
as many possible directions or as many directions as possible.
So, we have to find the heart state, and then we need to make sure that our system captures
from each angle that we want to consider images belonging to this heart state.
Okay?
So, we have now the situation.
Can you do this?
This is the beating heart.
This is the C-arm device.
This is the X-ray tube, and I have to rotate like this.
Yeah?
I have to rotate like this.
So, I have the rotation and the beating heart.
And that means while I'm rotating, the heart is in positions that are not considered to
be the position I want to have, like this interval that is a certain heart state with
a little motion, but it's acceptable.
In this angle range here, I capture images that exactly show the heart in this state
I want to have it.
Yeah?
Presenters
Zugänglich über
Offener Zugang
Dauer
01:07:10 Min
Aufnahmedatum
2012-07-09
Hochgeladen am
2012-07-10 15:29:58
Sprache
en-US