SE-EPI DWI is predominantly T2-weighted because of the 180-degree refocusing pulse, which corrects for dephasing due to field inhomogeneities. T2* effects from the EPI readout are minor.
@freinoeselmejor
6 ай бұрын
I wanted to ask this, because he repeatedly stated that the image was T2*-weighted. But it should be T2-weighted because of the rephasing 180° RF Pulse, right?
@mcwolke
6 ай бұрын
I had the same understanding.
@natasha5423
3 ай бұрын
Same question
@bparadise2
3 күн бұрын
Same question ~ In the previous lecture, he said it includes both T2* and T2. I didn’t fully understand, but I assumed it was beyond our scope.
@sohailkohri72698 ай бұрын
Most awaited lecture❤❤
@corina1967Күн бұрын
Thank you!!❤
@parsleyg78327 ай бұрын
🤦 I FINALLY understand this! Thank you so much!
@radiologytutorials
7 ай бұрын
Wow! Thank you so much. That’s very generous. So glad this helped!
@AsifKhan-mw4mwАй бұрын
Thanks brother...because of you I understand MRI Physics...keep it up❤
@sanawarhussain8 ай бұрын
Thank you, much awaited
@stanyjerosha17457 ай бұрын
Why is B0 a T2* W image when there is a 180 degree pulse applied at TE/2, shouldn’t it be a T2WI ?
@rg9428 ай бұрын
Excellent series, your videos have been invaluable for FRCR revision. Do you mind sharing whether the question bank will be made available to radiopaedia all access pass holders, and roughly what time frame this might be? Thanks
@johannarumenapp53728 ай бұрын
Thank you for your great explanations! Helps a lot!! Could you please do a video about diffusion tensor imaging?
@rachelcullens19114 ай бұрын
Can you do a SWI susceptability weighted imaging tutorial please? Thanks so much for your work, or ngaa mihi nui as we say in Aotearoa, NZ.
@RahulGupta-lk3qw8 ай бұрын
Please can u make a detail lecture on ct scan...❤
@asmaajlasimranmaqbool48556 ай бұрын
Excellent series Really helpful
@architpatel7008 ай бұрын
Thank you so much! This was very helpful
@umeshchandrabehera92428 ай бұрын
Nicely understood…..please make a video on ct and mri anatomy of orbit
@LilMissSqueak5 ай бұрын
Why is the B0 a T2* image if there is a 180 degree RF pulse used and a longer TE? - would the 180 degree RF pulse counter the T2* effects and make a T2 image?
@abosaleh33182 ай бұрын
Should I learn this as an aspiring neurosurgeon?
@anumfarooq94317 ай бұрын
Kindly make videos of nuclear imaging.stay blessed.
@ayaansingh12498 ай бұрын
After a long time, thnks a lot for the lectures. Love from india
@dylanropert7 ай бұрын
B0 creates T2 not T2* because of 180 pulse, correct?
@local938 ай бұрын
Even though we confirm with ADC that restriction is true why do we still value dwi more than ADC and dwi together? Like in pirads we can count high signal on dwi even with normal ADC. In general hyperintensity on dwi even without hypo on ADC should be at least suspicious.
@pvbb78936 ай бұрын
Simply the best. As always.
@radiologytutorials
6 ай бұрын
Thank you ☺️
@brightugwueze45128 ай бұрын
Thank you so much Dr
@DJMaster268 ай бұрын
Thank you very much indeed!
@radiologytutorials
8 ай бұрын
My pleasure 👍🏼
@EllieRad20238 ай бұрын
Wonderful
@sahajkaur85538 ай бұрын
How many videos are there going to be in the MRI series?
@amellayouni15718 ай бұрын
you're genius
@aaqibzyt8 ай бұрын
Ive a question . How do Diffusion gradients in same directions lead to rephasing? If they were in opposite directions id get it cuz laggers become leaders but it is in the same direction so the leader will still be going faster than the lagger on the second gradient? I am considering a voxel with all in phase and then gradient along one plane in my model and applying the previous leader lagger model.
@radiologytutorials
8 ай бұрын
The 180 degree RF pulse causes the ‘leaders’ to become the ‘laggers’. If there was no RF pulse the diffusion gradients would need to be in opposite directions. However the 180 degree RF pulse means that the two diffusion gradients will effectively be equal and opposite.
@aaqibzyt
8 ай бұрын
@@radiologytutorials somehow it makes sense now. Thank you. Master Sorcerer.
Пікірлер: 43
SE-EPI DWI is predominantly T2-weighted because of the 180-degree refocusing pulse, which corrects for dephasing due to field inhomogeneities. T2* effects from the EPI readout are minor.
@freinoeselmejor
6 ай бұрын
I wanted to ask this, because he repeatedly stated that the image was T2*-weighted. But it should be T2-weighted because of the rephasing 180° RF Pulse, right?
@mcwolke
6 ай бұрын
I had the same understanding.
@natasha5423
3 ай бұрын
Same question
@bparadise2
3 күн бұрын
Same question ~ In the previous lecture, he said it includes both T2* and T2. I didn’t fully understand, but I assumed it was beyond our scope.
Most awaited lecture❤❤
Thank you!!❤
🤦 I FINALLY understand this! Thank you so much!
@radiologytutorials
7 ай бұрын
Wow! Thank you so much. That’s very generous. So glad this helped!
Thanks brother...because of you I understand MRI Physics...keep it up❤
Thank you, much awaited
Why is B0 a T2* W image when there is a 180 degree pulse applied at TE/2, shouldn’t it be a T2WI ?
Excellent series, your videos have been invaluable for FRCR revision. Do you mind sharing whether the question bank will be made available to radiopaedia all access pass holders, and roughly what time frame this might be? Thanks
Thank you for your great explanations! Helps a lot!! Could you please do a video about diffusion tensor imaging?
Can you do a SWI susceptability weighted imaging tutorial please? Thanks so much for your work, or ngaa mihi nui as we say in Aotearoa, NZ.
Please can u make a detail lecture on ct scan...❤
Excellent series Really helpful
Thank you so much! This was very helpful
Nicely understood…..please make a video on ct and mri anatomy of orbit
Why is the B0 a T2* image if there is a 180 degree RF pulse used and a longer TE? - would the 180 degree RF pulse counter the T2* effects and make a T2 image?
Should I learn this as an aspiring neurosurgeon?
Kindly make videos of nuclear imaging.stay blessed.
After a long time, thnks a lot for the lectures. Love from india
B0 creates T2 not T2* because of 180 pulse, correct?
Even though we confirm with ADC that restriction is true why do we still value dwi more than ADC and dwi together? Like in pirads we can count high signal on dwi even with normal ADC. In general hyperintensity on dwi even without hypo on ADC should be at least suspicious.
Simply the best. As always.
@radiologytutorials
6 ай бұрын
Thank you ☺️
Thank you so much Dr
Thank you very much indeed!
@radiologytutorials
8 ай бұрын
My pleasure 👍🏼
Wonderful
How many videos are there going to be in the MRI series?
you're genius
Ive a question . How do Diffusion gradients in same directions lead to rephasing? If they were in opposite directions id get it cuz laggers become leaders but it is in the same direction so the leader will still be going faster than the lagger on the second gradient? I am considering a voxel with all in phase and then gradient along one plane in my model and applying the previous leader lagger model.
@radiologytutorials
8 ай бұрын
The 180 degree RF pulse causes the ‘leaders’ to become the ‘laggers’. If there was no RF pulse the diffusion gradients would need to be in opposite directions. However the 180 degree RF pulse means that the two diffusion gradients will effectively be equal and opposite.
@aaqibzyt
8 ай бұрын
@@radiologytutorials somehow it makes sense now. Thank you. Master Sorcerer.
You are my hero
😊😊
❤❤
Yay! :)))
❤❤
❤❤
❤❤