A single measurement is that you magnetize the body in a particular pattern, then watch how that magnetic pattern fades. Then do it again in another pattern and repeat. Think of the patterns as being terms in a Fourier series, which you eventually will do a Fourier transform on to get the original thing.
The name of the game, therefore, is to be able to get away with as few measurements as possible, and to be able to perform measurements here while still recovering from measurements there. Oh, and while we're at it, let's try not to be thrown off from things that tend to move around. Like arteries do every time another heartbeat comes through.
So yes..there is a lot of interactivity in an MRI measurement.
A single measurement is that you magnetize the body in a particular pattern, then watch how that magnetic pattern fades. Then do it again in another pattern and repeat. Think of the patterns as being terms in a Fourier series, which you eventually will do a Fourier transform on to get the original thing.
The name of the game, therefore, is to be able to get away with as few measurements as possible, and to be able to perform measurements here while still recovering from measurements there. Oh, and while we're at it, let's try not to be thrown off from things that tend to move around. Like arteries do every time another heartbeat comes through.
So yes..there is a lot of interactivity in an MRI measurement.