Interactive Transcript
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So I'm going to show you a case of multi-phase imaging,
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and we'll talk a little bit about the acquisition
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and also the point of the acquisition method.
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So this was obtained retrospectively gated.
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It's low pitch, somewhere around 0.25.
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7 00:00:29,540 --> 00:00:36,910 And the purpose was to assess aortic valve motion.
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And therefore, we wanted to get the aortic
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valve, aortic annulus, which is this plane here.
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We ended up getting a little bit of a ventricle.
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So the first thing is that you can work this out
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like a standard sequence and play around with it
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until you get the cardiac planes that you want.
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And I'm just going to demonstrate
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the short axis plane here.
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And the other thing you can do
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is you can play a cine loop.
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And that's what I'm doing over here.
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And so I can look at wall motion, I
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can look for function, wall thinning,
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and aneurysms and stuff like that.
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So this, in particular, this study was acquired
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retrospectively, and for all positions of the heart,
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such as this position here, we have information
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throughout the cardiac cycle, and we reconstruct
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at certain intervals, such as 5% or 10%.
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Here we are reconstructing at 5%
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intervals, and so, like this anterior wall
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here, we have information in all the phases.
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This is how we used to do all our coronaries in
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the past, because we were worried that we didn't
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get the right data, that we might need another
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phase to look at another portion of the heart.
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That's now being supplanted by various forms
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of what almost approaches perspective imaging.
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And instead, we use this when we need multi
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phase data, such as of the valve here.
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So this is a nice three-dimensional
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cross-sectional view of the valve.
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And we can now look at the valve.
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Here it is systole.
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The valve opens, but may not open
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as much as we would want it to open.
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Stenosis.
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And here is diastole.
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And in diastole, the valve is closed.
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And you can see that there is nice closure.
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There is good acquisition.
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So this particular study was done as a planning
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for pre-TAVR, which is a way of placing a valve
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endovascularly, a very popular method at the moment.
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We end up choosing the best phase that shows us
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the annulus with the least amount of motion so that
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we can select that for our measurement purposes.
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Thank you.
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