Introduction to MRI: Basic Pulse Sequences, TR, TE, T1 and T2 weighting

Поділитися
Вставка
  • Опубліковано 31 гру 2024

КОМЕНТАРІ •

  • @karaashley9519
    @karaashley9519 10 місяців тому +2

    wow this helped me so much… that rephasing example with the cars was so simple but i am mindblown at how much it made it make sense!! thank you!!

  • @anncampbell6766
    @anncampbell6766 2 роки тому +3

    NOW I CAN CHANGE MY CAREER CHOICE, THANK YOU!

  • @sajjadN1
    @sajjadN1 Рік тому +1

    Thank youuuuuu this is the best video of playlist. Helped me a lot.

  • @CatMedy
    @CatMedy 2 роки тому +4

    thank u so much for the videos, you're best at explaining such complicated themes!😍

  • @ienjoysandwiches
    @ienjoysandwiches 2 місяці тому

    PD is best to discern tears in MSK because it cancels out all the signal from the cartilage and menisci, allowing fluid to really stand out. Perhaps more because of contrast (ie high SNR) between the tear and the surrounding connective tissue than true T2 signal, as the TE is shorter.

  • @fumulaninkhoma3627
    @fumulaninkhoma3627 2 місяці тому

    Thanks bro ur videos really helped

  • @RohitPant04
    @RohitPant04 2 роки тому +1

    Got it finally! Thanks.

  • @jejojoje9521
    @jejojoje9521 2 роки тому +1

    But, if T2 is shorter than T1, in ohter words, T2 effect decays earlier than T1 effect, how does a long TE emphasize T2 in detriment of T1?
    By following the logic that T2 is shorter than T1, so the more the time passes, the greater would be T1 effect in comparison with T2, right?

  • @نهىيوسف-ل6ث
    @نهىيوسف-ل6ث Місяць тому

    are there any other mri physics vodeos?

  • @mohammadshahjad1637
    @mohammadshahjad1637 Рік тому +1

    Thank you 🙂

  • @KirtiSharma-tm2qr
    @KirtiSharma-tm2qr Рік тому

    sir , when fat have short longitudinal relaxation time then why they relax quicker on z-axis in short TR

  • @rianshala3565
    @rianshala3565 Рік тому

    How does fat and water appear in gradient sequences?

  • @iimeo1363
    @iimeo1363 2 роки тому +2

    Thank u ❤️

  • @mrkarn8241
    @mrkarn8241 2 роки тому

    is it safe to say to fire immediately a 180 pulse to have a shorter TE?

  • @Mars_Man21
    @Mars_Man21 2 роки тому

    Great video

  • @destynhernandez-bravo6057
    @destynhernandez-bravo6057 2 роки тому +1

    Hi! These have been so helpful! By chance, do you know when the video for Fat Saturation will be posted?

    • @LaserPeow
      @LaserPeow 2 роки тому +1

      isn't fat saturation just some inversion recovery, where you give a 180° RF impulse with specific timing for fat and apply a 90° RF puls when the fat is at a 90° angle so it wont be affected? thus the 90° RF impulse only affects every other proton that is not parallel to this impulse?

  • @BrettCarpenter-f1m
    @BrettCarpenter-f1m 26 днів тому

    starting classes in january!

  • @Sabrina-cs8cl
    @Sabrina-cs8cl 2 роки тому

    Thank you very much!!

  • @JflyG
    @JflyG 2 роки тому +1

    From an R1, thanks

  • @RinkooGupta-u5x
    @RinkooGupta-u5x 2 місяці тому +1

    Wow

  • @MetalAndor
    @MetalAndor 2 роки тому

    Tissues usually have a much slower T2 time vs T1. So how come short TE isnt better for T2 times?

    • @9cobil299
      @9cobil299 2 роки тому +4

      If im not mistaken, it is because we want some amount of dephasing, such that fat and water will give of different signal intensity. If they are all in phase (short te), it will be harder to tell the difference in tissue composition.

    • @esthermaina3825
      @esthermaina3825 Рік тому

      @@9cobil299 You are right Well out

  • @Kormadiku
    @Kormadiku 2 роки тому

    Amezing !

  • @WaqasAhmed-sh4cr
    @WaqasAhmed-sh4cr 9 місяців тому

    Man ,its just too difficult 😢

  • @thepluginate
    @thepluginate Рік тому

    MRIPETCTSOURCE

  • @MrSlawkie
    @MrSlawkie 2 роки тому +6

    But wtf is echo? :(

    • @amartinezsilberstein
      @amartinezsilberstein 2 роки тому +8

      An RF pulse is transmitted to the tissue. The tissue absorbs part of the energy of this RF pulse. Then the tissue releases this energy in the form of another RF pulse (that has a different shape). I think this is what is referred to as "echo". It's the echo of the RF pulse transmitted by the MRI machine, that comes from the tissue that is being scanned. The tissue abrorbs the RF pulse and (kind of) releases it back so it can be received by the MRI machine.

    • @LaserPeow
      @LaserPeow 2 роки тому +1

      the echo is the frequency of the precession of the protons that if you activate the antenna at a specific time (TE) will net you a current in the coils, which can be interpreted via an algorithm

    • @TC-dw6wg
      @TC-dw6wg 2 роки тому +4

      The echo is the rf signal received back into the coil from the body. This signal is what we use to create images

    • @truongvinh3108
      @truongvinh3108 11 місяців тому +1

      ​@@amartinezsilberstein your comment is all i need today 😭

  • @anarbay24
    @anarbay24 Рік тому

    Meh, video!