One additional thing you may have noticed in practice but which I forgot to add to the video... On some MRI exams, you may see DTI was performed instead of DWI, yet you still see an Isotropic or Trace image produced. From the video, hopefully you can now see DTI is somewhat of an overkill version of DWI. These "cheap" DTI sequences typically use the minimum 6 gradients needed to perform DTI imaging and generate FA images yet are not accurate enough to use for Tractography. However, you can still calculate a Trace image from the images produced by the diagonal gradients (Dxx, Dyy, Dzz), as well as an isotropic image (geometric mean) of the images produced from all gradients applied and thus you clinically treat these just the same as the Trace or Isotropic images produced from a standard DWI sequence.
Wow thank you so much!! This lecture was one of the hardest to put together but so glad that we found a way to make it a little more digestible than textbooks. If you liked the technicality of this one then hold tight because the next set of lectures are going to be groundbreaking, stay tuned!
One additional thing you may have noticed in practice but which I forgot to add to the video... On some MRI exams, you may see DTI was performed instead of DWI, yet you still see an Isotropic or Trace image produced. From the video, hopefully you can now see DTI is somewhat of an overkill version of DWI. These "cheap" DTI sequences typically use the minimum 6 gradients needed to perform DTI imaging and generate FA images yet are not accurate enough to use for Tractography. However, you can still calculate a Trace image from the images produced by the diagonal gradients (Dxx, Dyy, Dzz), as well as an isotropic image (geometric mean) of the images produced from all gradients applied and thus you clinically treat these just the same as the Trace or Isotropic images produced from a standard DWI sequence.
This is so good, you explained these concepts way better than my 500-page physics MRI text book 👍.
Wow thank you so much!! This lecture was one of the hardest to put together but so glad that we found a way to make it a little more digestible than textbooks. If you liked the technicality of this one then hold tight because the next set of lectures are going to be groundbreaking, stay tuned!
PROFESSOR Finally the great courses❤❤❤❤thank you for your efforts. I'm a radiation physics student.
Thanks for commenting! Best of luck with your studies and please let me know if there is any way I can further help!
@@MRIPhysicsEXPLAINEDparallel imaging lecture please
@@karthikraju6286 Will look into it!
Thank you for the great lectures
Glad they are helpful and thanks for commenting!