Isotropic Voxel - Tips & Tricks

  Рет қаралды 3,477

Everything MRI

Everything MRI

Күн бұрын

Isotropic Voxel - Tips & Tricks
Hello MRI Community,
After a break of several months, I am happy to share with you some new education material MRI related. As anticipated from the title, this time the discussion will involve isotropic voxels in MRI, specifically in neuro examinations. We will first introduce the concept of voxel, explaining when this can be defined as "isotropic", for then moving to the evaluation of some specific brain sequences acquired with different voxel sizes to understand the impact on the image quality.
If you want hear more about 𝑬𝒗𝒆𝒓𝒚𝒕𝒉𝒊𝒏𝒈 𝑴𝑹𝑰 please subscribe to the channel and follow us on our social media platforms: linktr.ee/everythingmri 🔔
Thanks for supporting me. Let's continue to increase the knowledge of the MRI community together 🧲
#MRI #MRIradiographer #Magnetic #Resonance #Imaging #Neuroimaging #Radiographer #Radiology #Radiologist #3Tesla #Resolution #Voxel #Anatomy #Brain #Siemens #KZfaq #LinkedIn #MRIcommunity

Пікірлер: 23
@yvar77
@yvar77 4 ай бұрын
Complimenti, fai dei video di buona qualità. Come già commentato sopra, sarebbe ideale se tu potessi mostrare le immagini a schermo intero e sopratutto, nella comparazione delle differenti acquisizioni, utilizzare la sincronizzazione quando "sfogli" le immagini tra le due sequenze. Inoltre sarebbe stato interessante introdurre qualche nozione riguardante la differenza tra voxel d'acquisizione e voxel di ricostruzione, a livello macchina. Anche qualche accenno al doping dell'interpolazione 😅. Ancora complimenti
@everything-mri
@everything-mri 4 ай бұрын
Grazie mille per il commento davvero utile. Siamo sempre al lavoro per migliorare la qualità dei video, questi suggerimenti fanno davvero comodo. Per quanto riguarda gli spunti inerenti al voxel, essendo un argomento abbastanza corposo spero di poterci tornare su in futuro e toccare tutte quelle tematiche da te menzionate. Nel frattempo, grazie ancora per il contributo 🙏🏻
@nouray4658
@nouray4658 Жыл бұрын
Please do more
@shastriramroop4815
@shastriramroop4815 Жыл бұрын
Love it. Looking forward to more and learning
@everything-mri
@everything-mri Жыл бұрын
Thank you so much for the support
@shastriramroop4815
@shastriramroop4815 Жыл бұрын
Welcome man.
@muzammilbhat3321
@muzammilbhat3321 Жыл бұрын
Quite helpful. Please do more of this.
@everything-mri
@everything-mri Жыл бұрын
Thank you so much for the support. Much appreciated
@TAHA-TOUABA-RADIOGRAPHER
@TAHA-TOUABA-RADIOGRAPHER Жыл бұрын
Thank you so much pro
@karenfarino3027
@karenfarino3027 10 ай бұрын
I share the same passion for Mri and the number 1 fan of you . Please can you do more videos for resolution , thank you
@everything-mri
@everything-mri 10 ай бұрын
Thank you so much. We will dicuss more about resolution in the future 👌🏻
@interwebzful
@interwebzful Жыл бұрын
very well done but the comparisons should be more zoomed in
@everything-mri
@everything-mri Жыл бұрын
Thank you. It is something actually we are working on it. So please take the feedback as acknowledged 👌🏻
@alisuleiman3069
@alisuleiman3069 Жыл бұрын
Thank you a lot for all your lectures But can 8 ask you how to use the respiratory trigger in siemens mri cause I can't activate it by physico approach
@everything-mri
@everything-mri Жыл бұрын
Have a look at this video realised by the dear colleague Bac: kzfaq.info/get/bejne/r8idjbV5r7CVZ3U.html you will find some very useful info about triggering
@darkengine5931
@darkengine5931 Жыл бұрын
Is there any practical use for anisotropic voxels in volumetric imaging? I can't really think of any in the context of MRIs. Isotropic just makes so much more sense to me given that we can generally reduce the data to 1/6th or less and I can't think of any reason why an MRI voxel's rendering data would have to vary based on viewing angle.
@everything-mri
@everything-mri Жыл бұрын
I agree. I mainly adopt only isotropic voxels for 3D imaging routinely. Especially considering the advantage of high quality MPRs
@darkengine5931
@darkengine5931 Жыл бұрын
​@@everything-mri I see! I am coming at this as a computer graphics dev who inadvertently stumbled into your video looking for rendering techniques of anisotropic voxels. But then I became curious and fascinated that there are anisotropic options for MRI voxel rendering! Isotropic voxels just make so much more sense to me in the vast majority of use cases, but especially for participating media that don't have any clear notion of a surface/normal given how much less data they require and also how their uniformity lends themselves exponentially better-suited for fast compression and decompression. Anyway, I hope you'll forgive a CG programmer's tangent! It's interesting to me that MRIs not only have but largely had anisotropic voxel options when I think anisotropic voxels are so much more costly in general. Might as well stick to rasterizing image slices sorted by depth fragments in those cases if the voxel rep can't be represented in an isotropic fashion.
@everything-mri
@everything-mri Жыл бұрын
@@darkengine5931 wow, thank you do much. Your contribution is great!! This bring the discussion to the next level 👏🏻
@darkengine5931
@darkengine5931 Жыл бұрын
​@@everything-mri Cheers! Also maybe our terminology is a bit different rewatching the video. I think in CG, we generally consider voxels anistropic even if they aren't uniform in size or directional outputs when viewed from a certain direction/angle, provided that their properties are uniform/constant across all voxels. For example, if all voxels are twice as tall as they are wide or thick, we would generally still call that isotropic in CG provided that all voxels (not just some) are twice as tall or wide, since we can unify their data representations regardless and just scale them all uniformly without having to store the scale differences on a per-voxel basis. Mostly we're analyzing this from a data-oriented standpoint: per-voxel directional data that requires being stored individually per-voxel is anisotropic, while anything else isn't. I don't know if this is of any interest to you or not since I'm in such a different industry focusing on voxels for mostly entertainment purposes (films, games, etc), but there are engines now that can render billions of voxels (ex: 2048^3 voxel space and 100,000^3+ on powerful desktops) at real-time frame rates on a modest computer including real-time manipulation of the voxels, even possibly on mobile phone. Of particular interest to me is the sparse voxel DAG (some really interesting papers and videos there), which is basically just a compressed sparse voxel octree that compresses away the redundant portions of the voxel hierarchy. It's actually an extremely simple concept but can take an engine like Minecraft from being limited to a million voxels to easily rendering, manipulating, and storing hundreds of millions of voxels to billions or even trillions of voxels at the same frame rates. But unlike Minecraft, getting that level of compression usually requires isotropic voxels, but in exchange we can store way more (easily to the level of what Minecraft stores at the texel level and beyond).
@everything-mri
@everything-mri Жыл бұрын
@@darkengine5931 wow!! That's great. I think all the people reading this will find this piece of information extremely interesting. Again, thank you for sharing
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