Phase Contrast MRA and Velocity Encoding (VENC) | MR angiography | MRI Physics Course #26

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Phase contrast magnetic resonance angiography utilises the differences in spin phase effects between moving and stationary spins. Here we discuss the use of bipolar gradients to induce phase differences along multiple planes in the slice.
We then discuss velocity encoding (VENC) and it's role in imrovinjg accuracy and preventing aliasing.
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[@pvbb7893]

Before starting CT physics there are many other MR topics to tackle.😅 Looking very much forward to it. Great content!

[@golumathurm2009]

Omg...I can't thank you enough for this video🤗🤗🤗

[@7126871]

Flawlessly explained, thank you very much for this content!

[@onweumahi]

Can’t wait for you to start videos on Ct physics 😊

[@kayk928]

Please go over functional MRI when you have the chance! Thanks for all your amazing contents.

[@rubyamir5245]

@9:49 isn’t it counter-intuitive that stationary spins will not give any signal although they have more potential to be in phase and so can give bright signal? While the opposite should be true for the moving spins that experienced phase shift? I am sorry I m confused… specially after going through the “diffusion weighted imaging physics” where the basic theme was that stationary protons will give brighter signal (restricted diffusion)… please help !!

[@golumathurm2009]

Sir what's the best method for quantification of CSF.?

[@MuhammadIbrahim-ip7nq]

Sir when u r going to start CT physics

[@anumfarooq9431]

Doesn't this oppose the concept you have taught all along..that it's the in phase spins which provide signal??