MR SPECTROSCOPY - “HOW I DO IT”
Vložit
- čas přidán 8. 07. 2024
- After request from my viewers I’m happy to break down a difficult topic such as Spectroscopy. I will try to show you how to perform this along with post processing and tips/tricks to avoid pitfalls.
Tune in and check it out.
Thanks for watching, following and supporting.
#S_MAGNETIC_VLOG #MRI #SIEMENSHEALTHINEERS #SPECTROSCOPY #MEDICAL_IMAGING #MRI_TECHNOLOGIST #MEDICINE #MRI_RADIOGRAPHER #MRIRADIOGRAPHER #RADIOLOGY
References:
• Adventures - A Himitsu music: bit.ly/2D2Kuk2
• MRI Spectroscopy RADIOPAEDIA.ORG: bit.ly/3vZoIEo
• Clinical pitfalls…. Cianfoni.A., et.al: bit.ly/34QHNwL
• A practical guide…. Essig,M., et.al: bit.ly/3z7kfS4
Thanks for this.
very interesting and informative thank you Bac
You are amazing
Thank you so much
Thanks, I required best information
Thank you for sharing, Mr Bac (y)
Been waiting for this!
For localizer , we will use the post contrast sequence. Some tumours will be enhanced and it is more easier to put the small boxes in CSI sequence to include the tumour . The curve will be much better. Besides, we will reformat the MPRAGE 3D sequence into sagittal and coronal plane and use SCROLL NEAREAST to help to put the box more precise.
Yes. Smart move and agreed. We also use post gd sequences to position and tune in using the planes we got. The “little” extra time you put in to be as perfect as possible, you will get a better curve and save rescanning.
Thank you Bac, another great video :)
Wow haha what a coincidence! I was doing MR spec when I see the vid popped up into my feed. Awesome!
That’s awesome ☺️
Thank U soooooooo much :)
Agree with you Bac 👍🏻 very difficult topic, is a diffiucult practice to do. You need time and must be focused on the lesion to study. Great job.
Thank you. I’m not familiar with other vendors when it comes to spectroscopy. I guess “to do” is more a like the same. But the physics is just palm sweating ☺️.
Thanks for the video!
Perhaps, in the next spectroscopy video some tips on the water suppresion and chemical shift displacement artifact would also be worth mentioning
Thanks. It’s a large topic to cover.
🔥🔥🔥🔥
Great explanation, once again thanks for sharing!!!!
What about fMRI?
Thank you Bac. I believe the FWHM max on a 3T is 20.
Yes,are mostly correct there. THANK YOU. ☺️
For a single voxel yes. If you use a csi i think you could work
I have seen someone adding lots of sat bands around the multi voxel white square (makes FWHM closer to 15) but when I tried to add sat band today it was not allowed. Are the sat bands necessary? Also for some reason I cant get the confirm frequency adjustment window to show during the multi voxel one. How do I adjust that? I did tick the adjust line when setting up. Thanks
Podrias traducir tus videos, al español, seria fantástico, gracias
Sir could you make a post processing video for alanine peak in spectroscopy
Can you do CSF and post process please
Could you make a video how to do tractography? post processing ✌️
Was about to ask for the same. Thanks for all the videos Bac! Take care
Super thanks
Hey Bac, these months ive already had a couple of cases which required spectroscopy and I found your tips pretty helpful. One thing that always pops into my mind is you saying that the voxels are covering bone and fluid so the image quality wont be good. Ive tried lowering the FOV and VOI but as always SNR reduces quite a bit and makes me unsure if Id waste my precious 7min. For example in cortical lesions would you prefer going with SVS? Thanks again like always.
Good question. Dropping the voxels will kill the snr for sure. Yes some sites prefer svs. I recommend you to talk with your radiologist whenever they are post processing these spects and also a physician if they are around. Spectroscopy itself is challenging and difficult for sure. Nevertheless, thanks for finding value in the video. 😊
Hi Bac, nice video! Could you shed us some light on the difference between csi slaser and csi se? Thanks!
www.cmrr.umn.edu/spectro/
Love your video man. Great stuff. Do you have tips on the Spectroscopy on the XA software?
Thanks. No i haven't made a video for that yet.
Brasil 🌺
Please uplode a video about step by step MRI scan.
It’s a huge field. I already made a lot of video on certain examinations. Check those videos also.
Hello there. Can you do MR perfusion and mr functional brain video? Thanks for sharing! My device is GE Signa voyager :/
Kha pe job krte ho sir
?
this isn't related but could you do an advanced video on importing new sequences? like with the .dll, .so and .exar1 etc files and how they should be saved in dot cockpit etc? i find the siemens UI super unintuitive and confusing in this way :-/ thanks for considering
czcams.com/video/CabC06rbU44/video.html
Better to do with manual adjustments.
Hello been watching tou in yourube and alao your tips in linkedin. How dis you know so much about mri? Which reference are tou reading
thanks. czcams.com/video/3n-IjT6idA4/video.html . ive been in this game for many years. time flies. but im lucky to have a good workplace with good colleagues around me which keeps me motivated. you never stop learning. i still learn so much in this field :)
Hey Bag... I want to ask you about the 31P MRSpectro... How can I do it? In Siemens 3T vida
hi you mean this? www.siemens-healthineers.com/magnetic-resonance-imaging/options-and-upgrades/clinical-applications/31-p-spectroscopy
Hello thank you for sharing your knowledge By the way, i have questions
Do i have to know chemistry to understand MRS?
Good question. But I don’t think so.
@@Nguyen_MRI Thank you!
Hello, it's really hard to find MRS information online... Since MRS focuses on small tissue and generates spectrum; are there any additional risk from normal MRI? Also, is it efficent to check T2 hyperintensities that does not look like tumor when patient heavily alergic to gd?
Sir bac i have a question, do we need to move also the planning in SAG and COR sir ? Or only the AXL ?
At least two planes from my opinion. There is also good if having the possibilities to do so. Never one alone.
Sir,Can you explain what you mean by 2Distortion and no distortion
pubmed.ncbi.nlm.nih.gov/16757858/
Thank you Bac, why did you choose the 3T spectroscopy presets ?
Oh no. That’s totally wrong. Supposed to be from the folder 1.5T. Thanks for the head up. Actually I’m going to compare when I get to work. Between presets 1.5T and 3T. 😬
@@Nguyen_MRI ;) However , the results that you have seems ok ! That’s weird
@@fafben I just didn’t noticed when I did this video. Strange thing though.
Hello sir,plz give ur wtsapp no
Why we take spectroscopy after contrast injection? Any specific reason? Or can we take before contrast also???
Good question. Take post gd to make the protocol more time efficient. A post gd t1w with enhancement is easier to place the spectroscopy. But of course also possible to do this pre gd.
Can u perform Perfusion on Magnetom?
Yes perfusion can be performed.
tractography please :(
Hi..
What could happen if we reduce the average of spectroscopy from 3 to 1 or 2..
Will that do anything to the results(peaks in the graph)?
Thanks..
@@divyank.t.5710 you can of course save time but might also struggle from low snr
@@Nguyen_MRI thanks for the response..
What could the low Snr do to spectro?
@@divyank.t.5710 i haven't been there to try that. But I'm sure the peaks comes out badly. Doing a single voxel can be helpful in time savings.
Sir how can we choose between SVS and CSI ?
they have their pears and pitfalls. so please check the links i provide. very much good info in those free papers
@@Nguyen_MRI Thanks 💓
How can you do a manual shiming ?
www.mcw.edu/-/media/MCW/Departments/Radiation-Oncology/MRI-Protocols/Siemens-Manual-Shim-Process.pdf?la=en
@@Nguyen_MRI thank you 😊
@@mohamedhabibfezzani1589 you’re welcome.
How to get ratio of choline creatinine
Check the video at around 9min:21sec. Just choose choline creatinine there
How to add Lipid
Bac what's the difference csi 135 to csi 270
good question. depends on your case and what kind of metabolite you want to highlight. please do a futher reading on this paper for a better understanding. @t
@@Nguyen_MRI thank you bac
from where i can get siemens 1.5 T software
In the video at around 3min. You can see where if should be. If not then you don’t have it
@@Nguyen_MRI ok thanks
Rubbish
How come?
Nice!
I have been asked to use single voxel MRI spectroscopy for traumatic brain injury. Do you know of any resources or applications on this
Peace.