I angle like image 2 (AC/PC line). This was how we did it with CTAs too. Also, our radiologists require us to scan lower to include the basilar/vertebral arteries, and include the anterior cerebral arteries. It's pretty much the entire head. Thank you for the video!
I set my TOF like image 2 that you eluded to. Thank you so much for another excellent video, Bac ! I really enjoy, appreciate and learn so much from your teachings. Blessing to you for taking the time to help others.
Hi Bac I use to angulate the other way around , just to put the plane perpendicular to the flow of the vessels, avoiding the void artifact. It's an average to the flow direction of arteries. but I will do that experiment with diferent angulations;)
Ideal angle in 2D&3D TOF is 90 degrees to flow (slice/slab perpendicular to flow), otherwise blood flow is too long inside a slice or slab and it get's too much RF and get's saturated> signal fades (in plane saturation).. Of course techniques like Motsa and tone helps.
@@Nguyen_MRI Much less angulation, almost straight, but of course there is always some arteries that are flowing too much time in slab. Years ago it was more angulation, but now when seq's are faster, more straight and more slabs.
My hospital often uses contrast for their MRA studies. I need to see an MRI angiogram head with contrast using flouro trigger and with smart prep. Thanks
very good question. i was taught like this since i started working with mri. nonethless. i tested both image 1 and image 2, i can see that with image 1 i get more of the superior part of circle of willis. how do you do it?
Hi Bac@@Nguyen_MRI. I do mine without angulation. However to get the superior portion of the COW, I increase the number of stacks just to cover more area. Penalty? Yes of course! Increased scan time 😃.
very good question. i was taught like this since i started working with mri. nonethless. i tested both image 1 and image 2, i can see that with image 1 i get more of the superior part of circle of willis.
Here is the question, you can do with no anglulation or with some angulation that you always will have artifacts due to the curve of the vessels loosing the direction of the flow of the blood , causing to a decrease of nucleons inside of that slice that are excited . Once the plane must be perpendicular to the direction of the vessels flow. Right ?
I angle like image 2 (AC/PC line). This was how we did it with CTAs too. Also, our radiologists require us to scan lower to include the basilar/vertebral arteries, and include the anterior cerebral arteries. It's pretty much the entire head. Thank you for the video!
Thanks for the input ☺️
Great information and beautiful explanation! Thank you Bac as always!
Thanks for kindly words.
Thank You!
I set my TOF like image 2 that you eluded to. Thank you so much for another excellent video, Bac ! I really enjoy, appreciate and learn so much from your teachings. Blessing to you for taking the time to help others.
Thanks for kindly words. ☺️
very good
Amazing.. informative video. Thank you.
Hi Bac I use to angulate the other way around , just to put the plane perpendicular to the flow of the vessels, avoiding the void artifact. It's an average to the flow direction of arteries. but I will do that experiment with diferent angulations;)
Thanks for sharing your input. Very interested. It's strange just a "small" thing as angulation and yet we do things so differently ☺️
Ideal angle in 2D&3D TOF is 90 degrees to flow (slice/slab perpendicular to flow), otherwise blood flow is too long inside a slice or slab and it get's too much RF and get's saturated> signal fades (in plane saturation).. Of course techniques like Motsa and tone helps.
@@nookenieminen5826 indeed. How do you do it in practice?
@@Nguyen_MRI Much less angulation, almost straight, but of course there is always some arteries that are flowing too much time in slab. Years ago it was more angulation, but now when seq's are faster, more straight and more slabs.
@@nookenieminen5826 thanks for your input 👍
Nice video. I've learnt more about post processing from the MIP thin side.
Thanks @Nguyen_MRI.
My hospital often uses contrast for their MRA studies. I need to see an MRI angiogram head with contrast using flouro trigger and with smart prep. Thanks
Thank you! Can you please show us how to do MRA Neck (Carotid) and post processing (MIP). Thank you very much!
Hi Bac
Do you use any image filters i.e. sharpening on this sequence?
No i dont think so.
Please make a video on acceleration factor
And specially focused on GRAPPA , SENSE ,SMS , AND SEPARATE TSE FACTOR ,
Great job
Can you explain video MRA without contrast upper limb؟
Bac, do you usually use compressed sensing on your TOF routine protocol?
Yes when ever i can. Do you?
@@Nguyen_MRIyes, we usually use a tof sequence with an acceleration factor of 6 with great spatial resolution in 3.30 min with our Vida
👍🏻
1
Yes image 1
Any specific reason why you prefer to angulate like image 1? Just out of my curiosity. 😊
very good question. i was taught like this since i started working with mri. nonethless. i tested both image 1 and image 2, i can see that with image 1 i get more of the superior part of circle of willis. how do you do it?
Hi Bac@@Nguyen_MRI. I do mine without angulation. However to get the superior portion of the COW, I increase the number of stacks just to cover more area. Penalty? Yes of course! Increased scan time 😃.
Always something with mri isn't. Trade off🤣
Please upload more videos of this software I think this is the latest version in Siemens. thanks
It's the latest yes.
@@Nguyen_MRI could you please upload brain MRS post processing ?
@@izharkhan1549 th-cam.com/video/ygIVwA97XEc/w-d-xo.htmlsi=5D8TSMhiBqlqoe_r
Hi, Bac We do image 2 for tof angulation..
Do you hv any specific reason to do angle with image 1?
Really curious~ 🧐
very good question. i was taught like this since i started working with mri. nonethless. i tested both image 1 and image 2, i can see that with image 1 i get more of the superior part of circle of willis.
I'm gonna try your way next time👍
@@Nguyen_MRI
I angle parallel to the hard palate in order to be perpendicular to the carotid...
Thanks for your input. ☺️
Here is the question, you can do with no anglulation or with some angulation that you always will have artifacts due to the curve of the vessels loosing the direction of the flow of the blood , causing to a decrease of nucleons inside of that slice that are excited . Once the plane must be perpendicular to the direction of the vessels flow. Right ?
Slab includes the distal ACA by angulation...? 🤔
Saludos crack 🩻✔️
Line going from genu and splenium, just like regular brain 🧠
We do ours the second way
hello can you give us subtitles in French
Thanks
Non of that 😅