MRI INTERPOLATION - A Follow Up

MRI INTERPOLATION - A Follow Up
In this video I’m going to do a follow up from my previous video ( • BACK TO BASIC - INTERP... ) where I look deeper into two questions from the comments. I will also give an explanation on how to calculate pixels sizes. I’m very surprised by the results, and I think I found a pitfall by using interpolation.
Also in the video I kept saying rectangular fov and square voxels, but what I mean are rectangular pixels and square pixels. Forgive me for that and don’t get confused.
I hope this video can be value for you, and thanks for tuning in and supporting.
#S_MAGNETIC_VLOG #MRI #SIEMENSHEALTHINEERS #INTERPOLATION #MEDICAL_IMAGING #MRI_TECHNOLOGIST #MEDICINE #MRI_RADIOGRAPHER #MRIRADIOGRAPHER #RADIOLOGY
References:
• MRI Interpolation - A better understanding - • BACK TO BASIC - INTERP...
• Upbeat happy : bit.ly/3zgGa8T
• Markvard - Spring: bit.ly/3bVtF74

[@Pendergeist]

Hi Bac, one year later and I still found this video really valuable. I was doing my own testing and it was driving me crazy why the interpolated images sometimes look worse and more blurry than the original, even though I can see there are visibly more pixels. Thank you very much for this follow up video and I hope to see more!

[@Nguyen_MRI]

Thanks for the feedback.

[@ryandraeger6392]

Thanks for the follow up Bac! Great info. Glad to see I wasn't going crazy

[@Nguyen_MRI]

Thanks for the ongoing discussion on my videos. Very helpful and I do learn myself. 👍

[@yosef8101]

Thank you so much for this follow up video and addressing my question. It's very helpful full explanation about interpolation 🙏🙏🙏

[@Nguyen_MRI]

Thanks for the ongoing discussions on my videos. ☺️

[@aleiatar]

Bac you're simply the best!

[@Innobo]

Thank you very much Bac This comparison really clear up my mind when using rectangular voxels Thank you !

[@abrabr6720]

Thank you so much. Follow up video is very good very informative

[@Nguyen_MRI]

Glad to hear it’s useful ☺️

[@blackswun]

Thank you very much,now I know more

[@ParveenTechnologist]

I learned quite a bit from you. 🙏

[@ParveenTechnologist]

Nice 👍

[@aneetaedwards3775]

hi there using phase Fourier like 7/6 i can able to reduce the scan time, but snr is also dropping, which is the best way to use this phase Fourier

[@Nguyen_MRI]

Depends on sequence and parameters used.

[@samanbandara1383]

Great thanks bac....... Can we reconstruct images into interpolation on even after scanned with out interpolation off images

[@Nguyen_MRI]

Yes possible. On older software you should do this almost right away retrospective recon. On newer software as XA you can do this the day after also after turning off and on the scanner. Check this video: kzbin.info/www/bejne/eoGpiqGlrJxkkNk Same procedure on E and older software. Get into the retro recon menu, then only thing you need to do is to turn interpolation factor 1 (means off) to 2 (means on). Then you have a new image set with interpolation on. This is a smart way to check if you can see any different in optimising instead of doing two scans.

[@samanbandara1383]

Thank you

[@safwanbinshazzad2127]

Thank you so much

[@divyank.t.5710]

Hi.. Could u plz put up a video about spine and extremities with implants.. (metal artifact suppression).. Thanks.

[@Nguyen_MRI]

That’s very interesting topic. I will whenever having the chance. 👍

[@divyank.t.5710]

@@Nguyen_MRI Thanks a lot.. & thanks in advance! 🙂

[@badrlinux6786]

Nice job Bac ❤❤👌

[@klompmer]

Hmm interesting. In my case, i mostly use square aswell.. But there are some 3D scans, were i want to save time and raise the SNR, which leads to a bit rectangular pixles. Wonder how much impact this has on 3D 🤔

[@Nguyen_MRI]

A further test need to be carried out 😂👍

[@danilopetricic356]

From my expirience you get much more blurry images when turning interpolation on on 3d than on 2d sequence with rectangular pixels. Even with the smallest changes on phase resolution. But with 100% phase res. always use interpolation.

[@Sold_a_dummy]

This is perfect. More follow up, the better. What's the advantage of using a square voxel on 2d images v a higher frequency?

[@Nguyen_MRI]

Voxels is the basic of spatial resolution. So using square pixels vs rectangular pixels are just based on experience on having sharper images.

[@Sold_a_dummy]

@@Nguyen_MRI spines for example, a sagittal T2 at my place is done at 384 by 224 or something similar. Though it would be longer, potentially, would a 320 x 320 or even 256 by 256 be better?

[@Nguyen_MRI]

Depends on your fov. But higher matrix as mention here 320 x 320 should be better, BUT only if having enough snr. Smaller voxels gives more details, but also less snr. Thereby compensate with more snr and pitfall added scantime. This is the golden triangle of basic MRI; spatial resolution , snr and scan time. Always give and take

[@ahmedabdelmoniem812]

sure

[@avinashabhi5502]

We may get video regarding MRI cartilage maping

[@9cobil299]

Hello, Bac! Regarding using interpolation in relation to square vs. rectangular voxels, do you have any literature that explains the phenomenon? I cant seem to find any online.

[@Nguyen_MRI]

Good questions. No unfortunately I don’t have or seen. It’s very much based on experience using this function. Thanks.

[@raspberrypi3892]

There is a lot of ringing artefact on those without interpolation! Do you have any sharpening filter applied? Also, are you interpolating by a factor of 2 or something else?

[@Nguyen_MRI]

No filter was used on this test. Ringing is due to Gibbs artefact. It’s also there on the interpolated images but not so visible. Interpolation on siemens is either on or off. That means factor of 2 is used.

[@davidbrown7932]

Bac David Brown from Detroit, I have been doing MRI for years and I love it . What is a great new book 📕 for MRI ce credits , a great refresher book or trade offs do you have any ideas God Bless thanks 🙏

[@thusharaweerakoon3451]

What book sir

[@Nguyen_MRI]

hi david, thanks for reaching out, i have a few in my mind and this just came out as preorder now: www.amazon.com/Handbook-MRI-Technique-Catherine-Westbrook/dp/1119759331/ref=mp_s_a_1_2?crid=7VDC5HJ7QMAU&dchild=1&keywords=handbook+of+mri+technique&qid=1632856339&sprefix=handbook+of+mri&sr=8-2 besides that there is also: www.amazon.com/MRI-Practice-Catherine-Westbrook/dp/1119391962/ref=sr_1_1?crid=1BD6EZKYBHZDM&dchild=1&keywords=mri+in+practice+5th+edition&qid=1632860493&sprefix=mri+in+pra%2Caps%2C249&sr=8-1 www.amazon.com/MRI-Picture-Proton-Donald-McRobbie/dp/1107643236/ref=sr_1_1?crid=10GZJZC6J8JP8&dchild=1&keywords=mri+from+picture+to+proton+3rd+edition&qid=1632860512&sprefix=from+picture+to+proton+%2Caps%2C251&sr=8-1 www.amazon.com/Artifacts-Technical-Solutions-Diagnostic-Imaging/dp/1728734924/ref=sr_1_12?dchild=1&keywords=mri+artifacts&qid=1632860526&sr=8-12 please take a look at those links :)

[@SC-gh6gd]

Great video! Can interpolation be used on all 3D and 2D imaging? Or just Spin Echo imaging? Thanks.

[@Nguyen_MRI]

Yes sure. Interpolation is also an option available on 3D sequences.

[@SC-gh6gd]

@@Nguyen_MRI Nice. Thanks! 👍

[@TheBeastSoul]

Hello Bac! I have one intersting case, how i can contact you?

[@Nguyen_MRI]

[e-mail]

[@user-un3yw6ek9p]

Hallo Bac. 1.Couldn´t it be interresting when you do this trial with a phantom with fat inside. Can interpolation do an effect in the quality of the Fatsat? 2. Are the squares in the squares (in the picture without interpolation) real?

[@Nguyen_MRI]

Thanks for the comment. 1. Interpolation do provide better images with or without fat sat. At least clinical images. Plantom i don't have the possibilities to try. 2. Yes.

[@user-un3yw6ek9p]

OK, but when they are real, it is realy not good, that you nearly can´t see them in the interpolated images @@Nguyen_MRI

[@Nguyen_MRI]

@@user-un3yw6ek9p i think i misunderstood your question regarding squares. Please explain again to me your question ?

[@Nguyen_MRI]

You mean acquired vs reconstruction (interpretation)?

[@user-un3yw6ek9p]

I mean that you can see squares inside each square, in the interpolated picture you can see only a square. Is this less information? In the No-interpolated pictures you can see more inside the squares. @@Nguyen_MRI

[@kenanoreaj9148]

????Who do it abdomen mri simense

[@6digitsman]

Please I do I contact you so u teach me mri very well…

[@23232Bing]

Yo. I'm second