Introducing MRI: Hardware - Gradient Magnetic Fields (20 of 56)

www.einstein.yu.edu - The twentieth chapter of Dr. Michael Lipton's MRI course covers Hardware - Gradient Magnetic Fields. Dr. Lipton is associate professor radiology at Albert Einstein College of Medicine and associate director of its Gruss Magnetic Resonance Research Center.

[@ElMundodeLiu]

These classes gave me a better understanding about the Magnetic Resonance Image. I really love it. Thanks you so much professor.

[@jacobvandijk6525]

The last 4 minutes clarified a lot for me about the fieldlines.

[@abdulraufade142]

You have broken the MRI technology into pieces-to the simplest level for a dummy. Albert Eisenstein said if you can not explain well enough it means you don't understand it well enough. Thank you

[@TheSkapieratt]

+1. This dummy is very grateful.

[@manirs2308]

could you please elaborate something about "gradient performance", as inscribed in Grainger and Allison's Radiology - 6th edition- page- 102. Would be grateful.

[@KurikuShoTto]

Yeah I'm pretty sure the right hand rule direction for those electromagnets are wrong

[@quarksarranged]

Can confirm from a physics point of view. I think this is a medical course though so I'm not sure they have to actually reproduce the physics perfectly. It's probably sufficient if they understand the concept. They are expected to use the MRI machines not build them ahah.

[@georgiosmenikou8893]

Not if you consider that the current direction is the direction of flow of POSITIVE CHARGES and not electrons !!!!!

[@shekharnarayanan8955]

@@georgiosmenikou8893 The current is always considered in the direction of positive charges i.e. opposite to the flow of electrons.

[@GabrielCsillaz]

Is that right hand rule correct? I think that he chose the wrong direction on those currents

[@jay_carraway]

Thought the same...

[@syuhaidah1999]

ya think right hand rule that he applied is not correct. i was confusing that part.. please help me asap.

[@seiji7363]

He is right but his drawing is kind of wrong. He drew the bore in wrong direction if that makes sense.

[@Rain-Dirt]

I don't understand why he would put two pairs of coils to create a gradient in the Y-direction? Why not one coil on top and bottom and skip the extra step, like many other textbooks do? Anyone know? I thought perhaps this was due to having all the fieldlines in the same direction of B0, and have only the RF perpendicular on the fieldlines?

[@Iwillfightcauseigotnothing]

bruh this dude is my hero احبك في الله

[@user-ol1xv2gy1v]

Thank you sososo much

[@zixuanwang6480]

This is so damn helpful. it is so concise and easy to understand. thank you soo much

[@Problemsolver434]

If the magnetic field of b0 has significant homogeneity, Why do we limit it to one spot using the gradient

[@Rain-Dirt]

Because there is not really any other way I think as it happens to be an effect of how all the gradients are set up in the way we need them => And we need gradients to locate where a particular signal comes from. In the end each "voxel" has 1 unique phase and 1 unique frequency.

[@botney420]

LOVE&LIGHT. ALLONE! TODO'S SOMO'S UNO!

[@rajendrakumai8964]

Descete is sim8lar digital ok

[@adriancato1531]

Chhgnn-

[@georgen9755]

Albert ??? you guys want a break ....already the classes are intervened by politics ......