MRI Physics | Magnetic Resonance and Spin Echo Sequences - Johns Hopkins Radiology

Поділитися
Вставка
  • Опубліковано 23 гру 2024

КОМЕНТАРІ • 144

  • @michaelblankenau6598
    @michaelblankenau6598 9 місяців тому +111

    The people who designed and engineered MRIs are geniuses . All these analogies don’t scratch the surface on the deep understanding one must have to make sense of this technology.

  • @hermanyuen4046
    @hermanyuen4046 Рік тому +86

    Please do more of these videos to explain other MRI sequences. Your analogies made the concepts so much more easier to understand! Please keep up the good work.

  • @jjajja-24
    @jjajja-24 Рік тому +44

    What a PERFECT explain it is!! I’m a student studying MRI in South korea where there are a lot of headmasters who lecture MRI poorly… Thank you for your high quality video and I’ll come back when I need your help thanks a lot!!

  • @supaahflyy
    @supaahflyy 6 місяців тому +7

    Explanation 10/10
    Video 10/10
    This is how you learn things. Use of analogies and clear cartoon videos. This video not only taught me the basics of MRI but it has taught me how i learn best rather than just read words in a textbook

  • @ThamizhanDaa1
    @ThamizhanDaa1 2 роки тому +128

    This video is soo good. Like my professor tried explaining this over 3 lectures, but I didn't understand. This video made it so crystal clear. Well Done!!

  • @x0xNOVAx0x
    @x0xNOVAx0x 2 роки тому +202

    Animator is god.

  • @common1028
    @common1028 10 місяців тому +3

    I was struggling to understand the spin echo sequence with the complicated formulas taught in class, but this just made my day :) So easy to understand with the super cute animations! Thank you sooo much!!

  • @easyMRI
    @easyMRI Рік тому +10

    The best explanation of the MRI basics ever!!!

  • @thadreimagined9391
    @thadreimagined9391 2 роки тому +14

    You brought me back from the brink of panic. Thank you.

  • @edwardhayes5229
    @edwardhayes5229 11 місяців тому +2

    That was incredible. I loved that you still used useful analogies for such a complex topic.

  • @17x30__
    @17x30__ 11 місяців тому +1

    At 1:58 in the video, the explanation was well done and allowed me to grasp the principles behind SPIN UP and SPIN DOWN effectively.

  • @14renukakadu28
    @14renukakadu28 Рік тому +2

    BEST VIDEO ON MRI AND NMR. I have been trying to understand this concept for hours. I have a much more clear understanding now. Thank Youuuu!

  • @daltonbryer3171
    @daltonbryer3171 Рік тому +3

    Huge help thanks nobody ever explains what axis things are spinning in. Please make more of these!

  • @heddaisbingingyoutube
    @heddaisbingingyoutube 11 місяців тому

    I am amazed over how much more understandable this concept just became, with your illustrations and great explanations. Thank you so much!!

  • @subiraa814
    @subiraa814 Рік тому +1

    Brilliant! Simply brilliant! Please make more videos like this, Dr. Erin Gomez and Emily Wu!

  • @MrTian1212
    @MrTian1212 Рік тому +10

    Please keep more coming!! This is so good!

  • @shujatali642
    @shujatali642 2 роки тому +5

    Super, can't have a better explanation than this. Amazing

  • @diegosoriavivas
    @diegosoriavivas Рік тому +7

    What an amazing job you have done! Thank you so much! This is a phenomenal video. You made this very easy to understand.

  • @dinaalmiari264
    @dinaalmiari264 Рік тому +1

    great video ! just summarized 105 slides of MRI in 10 minutes . Thank you

  • @SandMan_86
    @SandMan_86 29 днів тому

    This is an excellent video to explain the broad concept to physicians. Thank you.

  • @Gealamusic
    @Gealamusic 2 роки тому +7

    Thank you , this is so helpful, really impressive animation :O

  • @delfipotters3161
    @delfipotters3161 2 роки тому +20

    at 0:24 you say a hydrogen atom is just a proton, one positron and one electron. I'm very confused why you said that. There is no positron in a hydrogen atom

    • @HemaSalam
      @HemaSalam Рік тому

      Me too

    • @MyNotSoHumbleOpinion
      @MyNotSoHumbleOpinion Рік тому

      She probably meant "positive proton"...

    • @delfipotters3161
      @delfipotters3161 Рік тому +4

      @@MyNotSoHumbleOpinion Protons always have a positive charge. She hopefully meant proton, but saying positron is very wrong.

    • @MyNotSoHumbleOpinion
      @MyNotSoHumbleOpinion Рік тому

      @@delfipotters3161 yes, I know about positive charges of protons! But considering that luckily we live without positrons, "positive proton" seems to me the homophonic word that could match the erroneous "posi-tron"!

    • @acluster3411
      @acluster3411 Рік тому

      I guess that was jus slip of the tongue, she meant proton. She seems to know her stuff very well!

  • @ashidubey5225
    @ashidubey5225 Рік тому +1

    This is hands down the best explanation i've seen for this..!!!!

  • @REGINAESGUERRA
    @REGINAESGUERRA Рік тому

    Thank you! Makes so much sense for a visual learner like me! Give the animator a big applause!

  • @TheLadyskittles
    @TheLadyskittles Рік тому +1

    Best MRI video ever!!! Please make more of thesee

  • @trentmccauley2396
    @trentmccauley2396 3 місяці тому

    Needed to learn MRI basics quickly, and this was perfect. Thanks so much!!!

  • @selgomezbabe135
    @selgomezbabe135 2 роки тому +19

    This is super helpful!! is there another video for T2 and T2* weighting?

    • @yannickhs7100
      @yannickhs7100 Рік тому

      Was about to say that 🙏 would even pay for that !

  • @jakobv8
    @jakobv8 Рік тому +2

    Very interesting. I recently saw a 101 video of how MRI works and it's been lingering in my mind. This gave me a reminder and further depth. It is tricky stuff, really needs to explained several times to a layman.

    • @ew7512
      @ew7512 Рік тому

      Yes! I'm a layperson too, but really want to get a grasp on this technology because it's so fascinating and revolutionary. Watching a variety of videos explaining it is helping me to get a good understanding.

    • @brendawilliams8062
      @brendawilliams8062 Рік тому

      Me too, is there attractors involved. Deep stuff

  • @VikrantSingh-se2zb
    @VikrantSingh-se2zb 3 місяці тому

    Thanks for solid fundamental articulation of hidden underlying dynamics mechanisms about spin echo sequence imaging using directional RF Pulses.😊❤

  • @akekalukardjnaphai464
    @akekalukardjnaphai464 2 роки тому +5

    Your video is very great. I’ve just understand what the multiple line symbol in phase diagram means.

  • @thabangmoarabi2419
    @thabangmoarabi2419 2 роки тому +3

    You are very comprehensive. Thank you.

  • @hollumsss
    @hollumsss 2 роки тому +21

    Is there a second video yet? Thank you!! This is very informative

  • @chuanwu6118
    @chuanwu6118 9 місяців тому

    This is amazing!!!! Looking for more of these!

  • @sehrishmomin865
    @sehrishmomin865 2 роки тому +3

    Excellent explanation

  • @JWentu
    @JWentu 7 місяців тому +1

    0:26 ...I hear you mentioning a "positron"... where would that be? A positron is an antimatter particle, an electron with positive charge.... right?

  • @cloudsky997
    @cloudsky997 Рік тому +3

    Cutest explanation ever seen😆

  • @sophiaramos770
    @sophiaramos770 Рік тому +1

    This is amazing!! I wish there were more videos

  • @ianlewis4383
    @ianlewis4383 Рік тому

    I’ve met dr Gomez before and can attest that she’s a great person in general ❤ happy to hear her voice on a UA-cam vid

  • @viktorgotz1098
    @viktorgotz1098 Рік тому +1

    great explanation.. finally. Thank you so much!

  • @sitinurzahirahzamri8492
    @sitinurzahirahzamri8492 Місяць тому

    This is a really good explanation! Thank you!!

  • @ashleynicoleg770
    @ashleynicoleg770 Рік тому +3

    This is soooo good!

  • @larawagner2389
    @larawagner2389 Рік тому

    Wow this is so good! We need more

  • @princetamrac1180
    @princetamrac1180 10 місяців тому

    4:33 in what dimension is the spiraling along the z-axis happening? One axis is the tranverse magnetization, on the other longitudinal. What is the 3. axis to create a 3d spiraling effect? Also does the transverse magnetization flip from the "negative side" to the "positive side" back and forth in the spiral? How does that happen? Also, is the initial free induction decay with the 90° pulses not registered by the MRI and only the following 180° pulses? Thank you so much for the video. Cute little protons :D

  • @ShiraRachlin
    @ShiraRachlin Рік тому +2

    It says more on that later at the end- is there another video in this series?

  • @gabby.sanders27
    @gabby.sanders27 10 місяців тому

    this video saved me!!! so clear, thank you

  • @saisrinivas3909
    @saisrinivas3909 Рік тому

    Excellent animation and beautifully explained

  • @alerope6597
    @alerope6597 Рік тому +1

    Thank you very much! It was really helpful. Keep up the good work!

  • @bladox971
    @bladox971 11 місяців тому

    Exam in just a few hours, if i pass, it'll be thanks to you

  • @Npact84
    @Npact84 8 місяців тому

    So, can you use an MRI machine to affect the spin of an entangled particle? And if you could, you use that to potentially send Binary over a great distance faster than light?

  • @silvia9495-j4l
    @silvia9495-j4l Рік тому +2

    thank you so much! you are amazing!

  • @ANASSBOUSSAIDA
    @ANASSBOUSSAIDA 7 місяців тому +2

    5:19 It's 37% not 63%, thank u for this great animation

    • @brianallen2322
      @brianallen2322 4 місяці тому

      T2 time 63% of transverse magnetization to dephase or 37% is left in phase

  • @talesfreitas7873
    @talesfreitas7873 Рік тому +1

    Magnificente, but.. Did you said that a proton components are onde pósitron and onde electron? It's not wrong?

  • @suomynonaanonymous
    @suomynonaanonymous Рік тому +1

    fantastic explanation, wow!!!!!!!!!

  • @ranya1082
    @ranya1082 6 місяців тому

    please we need part 2 !!!!!!!!!!!!
    thank u

  • @annastark9917
    @annastark9917 10 місяців тому

    Very nicely explained

  • @johnandrheyabordo644
    @johnandrheyabordo644 7 місяців тому

    Does that mean that not all protons flip when an RF is applied? Only a few become antiparallel, and those few then undergo free induction decay?

  • @LinusLindén-h1i
    @LinusLindén-h1i 7 днів тому

    What does it mean to be "susceptible to T2* effects"? What kind of effects are those? I've understood T2-weighting to be a result of listening later, a longer TE, so that fat has already relaxed and all we pick up is signals from fluids. So a long TE and and a longer TR would result in a T2-weighted image. But the T2-signal is the first one?

    • @JohnsHopkinsMedicine
      @JohnsHopkinsMedicine  7 днів тому

      Hi, thank you for reaching out to us. Unfortunately, because each person’s medical situation is different, we are unable to provide treatment recommendations or second opinions via this form of communication.
      If you would like to request an appointment at one of our hospitals, please call 888-872-1408. Our specially trained medical concierges can arrange consultations or treatment plans with the most appropriate specialists. Johns Hopkins USA can also provide language interpretation, financial counseling, assistance with travel arrangements and anything else to help make Johns Hopkins feel as close to home as possible.

  • @amarshrivastava5363
    @amarshrivastava5363 Рік тому

    Sublime Explanation!

  • @Ματθαιοςγκ
    @Ματθαιοςγκ 6 місяців тому +1

    I think you misspelled something at 0:27. Hydrogen atom consists of one electron and one proton not positron...

  • @appsenence9244
    @appsenence9244 Рік тому

    Absolutely amazing video😊

  • @hasanghavidel2701
    @hasanghavidel2701 Рік тому

    how these protons are cute 😍, i could understand all concepts.. god bless u

  • @akekalukardjnaphai464
    @akekalukardjnaphai464 2 роки тому +2

    May I ask why T1 have to be 63% of recovery ? Where this number come from ? Is it 50% recover of total energy ?

    • @ozboz1995
      @ozboz1995 2 роки тому +3

      It comes from time constants (please google to learn more if you're interested).. 63% is used because its 1-(1/e) for an 'increasing' constant (where e = exponential function)

  • @bat7797
    @bat7797 Рік тому +1

    Thank you so much

  • @emald7739
    @emald7739 2 роки тому +1

    Two tissue types A
    and B have the same
    proton density and
    the same T1, but A's
    T2 is half as long as
    B's T2. Which of the
    tissues gives the
    highest signal on a
    spin echo image
    taken with TR=2500
    ms and TE = 50 ms?
    And why?

  • @harammuneeb462
    @harammuneeb462 Рік тому

    Excellent description. 😁

  • @michaelkasembeli6074
    @michaelkasembeli6074 8 місяців тому

    This was so helpful

  • @vanshthukral9440
    @vanshthukral9440 8 місяців тому

    Radiologists generally dont dive that deep into the physics of imaging modalities, i am shocked to see this MD knowing everything, she must be a genius

  • @samuelsimukoko3397
    @samuelsimukoko3397 Рік тому

    This is wonderful!!

  • @martinprochazka5280
    @martinprochazka5280 11 місяців тому

    Damn what a vocab this woman has

  • @jawadalhajj6804
    @jawadalhajj6804 9 місяців тому

    thank you for this great video

  • @HemaSalam
    @HemaSalam Рік тому +2

    How did a positron made it here 0:25 ? Can someone explain?

    • @acluster3411
      @acluster3411 Рік тому +1

      I think she ment proton.

    • @Adadhable
      @Adadhable Рік тому +2

      Yes, I wondering the same thing. What she said in the video is incorrect, and I think what she meant is "a hydrogen atom is a proton and an electron"

  • @nataliabarraza1979
    @nataliabarraza1979 Місяць тому

    Why it is call “90° pulse” if the spin point to the antiparallel and not to the transversal?

  • @mahima5402
    @mahima5402 Рік тому

    beautiful video

  • @Elyrion4409
    @Elyrion4409 9 місяців тому

    that was amazing!

  • @Pharaohmolo
    @Pharaohmolo 10 місяців тому

    Incredible.

  • @mohammadsadeghmanafi2827
    @mohammadsadeghmanafi2827 6 місяців тому

    Thank you

  • @MichelleKim-p9s
    @MichelleKim-p9s 4 місяці тому

    love it!!

  • @fiddlesticks6146
    @fiddlesticks6146 Місяць тому +1

    wheres the T1 vs T2 weighted video :(

  • @YoungDegenerate
    @YoungDegenerate 2 роки тому +1

    Thank you video

  • @CurlyToeHair
    @CurlyToeHair 20 днів тому

    While video was first from many which made me understand principals behind mri shout "crowd go wild, it's a tie" made me rewind clip few times back. It was hard to not start to think about rabbit vs tortoise race 😂

  • @patharnr8569
    @patharnr8569 Рік тому

    This vdo is valuable!

  • @KaptainLuis
    @KaptainLuis Рік тому

    Thank you!

  • @braaitongs
    @braaitongs Рік тому

    When atoms are hit with rf pulse, don't the parallel and anti-parallel fall over and align causing the 90 degree magnetic alignment?
    Anywho, this is extreme close to the method of nullifying gravity.

  • @skybuck2000
    @skybuck2000 Рік тому

    why do mri scan not scan the bottom nerves s2 to s5 ?!

  • @shathiskumargovindaraju1223
    @shathiskumargovindaraju1223 10 місяців тому

    great video. tq very much

  • @нупофакту-ъ4б
    @нупофакту-ъ4б Місяць тому

    I am humanitarian (literature and English) and I was handed out this theme to explore (we have units devoted to physics and I need to give a presentation in English) but English is not my native language and I had bad mark at physics at school.
    How unlucky am I?
    P.S. the video is really good as I start to figure out some things

  • @kaungsithusett9017
    @kaungsithusett9017 Рік тому +7

    not assuming anything about this particular presenter, but if it were an asian mom, the RF mom character would be holding a broom

  • @maximilianriemer2356
    @maximilianriemer2356 2 роки тому

    amazing Video

  • @Blak2blue
    @Blak2blue Рік тому

    I clicked cuz the molecules where so happy! 🥰🥰

  • @alexpaul5a
    @alexpaul5a 10 місяців тому

    What is T1 though?

  • @TheLadyskittles
    @TheLadyskittles Рік тому

    Where is the next one about T1 T2 phase?

  • @fahimandfardinsofficials1312
    @fahimandfardinsofficials1312 9 місяців тому

    Nice ❤

  • @NicholasVincent-ol1zk
    @NicholasVincent-ol1zk 3 місяці тому

    Whose the animater the cpu?

  • @radhaotwani3901
    @radhaotwani3901 Рік тому

    can i get notes form

  • @ViliamF.
    @ViliamF. 4 місяці тому

    0:25 Excuse me what? "Positron"?

  • @aryankhanaryankhan6562
    @aryankhanaryankhan6562 Рік тому +1

    How H pos have poles while having no electron

  • @sierraoneal3501
    @sierraoneal3501 Рік тому

    God bless you 🥲

  • @dhathriprasad7121
    @dhathriprasad7121 Рік тому +1

    Wow

  • @ileniapessotto7211
    @ileniapessotto7211 Рік тому +2

    soooooc cute!!!!

  • @shashikantvairat8073
    @shashikantvairat8073 Рік тому

    What's magnet