Thank you Robert, Reggie and Katie. Matt Rederer, is very very knowledgeable and very humble down to earth. I really appreciate his input to the mri world. He is the founder of riteadvantage very helpful tool for mri registry mrso mrse image optimization cardiac and so more… I wish if we can have more episodes with him. Thank you again Robert, Reggie and Katie...
Great video, thanks! In Philips scanners Scanwise is great. You just clik 'implant' when typing patient in to the scanner and then follow instructions. Put in SAR limit or B1+RMS limit, spatial gradient-limit and it shows you where the implant can't touch in bore or can you do the scan. You dont' have to search SGP-maps in muptiple viewangles. Also you can feed slew rate-limit and db/dt-limit, if given from implant manufacturer. And just start scanning. Well-of course scans are longer than normally. Matt mentioned that in Siemens scanners it is easiest to use low SAR-mode. I have noticed that Siemens-users use that a lot, but there is downside of that and I think that it is longer echo spacing and changing also TE in the middle of k-space. Also users might not notice to lower TF and the chain moves easily too long-blurring. Problem is also that Siemens don’t show you what k-space filling it uses (linear, asymmetric) or is the TE-time it shows the equivalent or effective? Or maybe I haven’t found them or just don’t have knowledge.. For example in blade-sequences you want high turbofactor to widen the blade and also want low ES- otherwise it won’t work correctly, artefacts. If you have normal SAR-mode and 180 refocusing pulse you can lower SAR-mode to low, that reduces SAR about 33% ( 1ms/1,5ms=0,67). Reducing flip to 140 and keeping normal SAR mode reduces SAR more, about 39,5% ( (140^2):(180^2)=0,605 ) and you can keep lower Echo spacing. Reducing Flip to 140 lowers signal only to 94% of it’s maximum (sin70). I have a question to Matt, about hyperecho. Using it in Siemens mri I don’t have a clue when choosing hyperecho, what the refocusing flip angle means then? If I put 100. Is it lowest , middle or highest flip in the tf-chain? In normal TSE if I lower re-flip under 120 it automaticully puts hyperecho on, but like I mentioned- what does angle mean then?
Thanks for Watching and for providing feedback about Scanwise on philips. As for HyperEcho thats a great question. We know that Flip angle of the refocusing pulse varies across the echo train, forming the hyperecho but how does that effect the flip angle that is selected? Great question we have to see if we can get an answer for that for you. Thanks again for the engagement and great questions.
In reference to conversations at the 29 min mark…. Some active implants actually require you to make sure a patient doesn’t have a temperature higher than xx and they are say no blankets.
Thank you Robert, Reggie and Katie.
Matt Rederer, is very very knowledgeable and very humble down to earth. I really appreciate his input to the mri world. He is the founder of riteadvantage very helpful tool for mri registry mrso mrse image optimization cardiac and so more…
I wish if we can have more episodes with him. Thank you again Robert, Reggie and Katie...
Great video, thanks! In Philips scanners Scanwise is great. You just clik 'implant' when typing patient in to the scanner and then follow instructions. Put in SAR limit or B1+RMS limit, spatial gradient-limit and it shows you where the implant can't touch in bore or can you do the scan. You dont' have to search SGP-maps in muptiple viewangles. Also you can feed slew rate-limit and db/dt-limit, if given from implant manufacturer. And just start scanning. Well-of course scans are longer than normally.
Matt mentioned that in Siemens scanners it is easiest to use low SAR-mode. I have noticed that Siemens-users use that a lot, but there is downside of that and I think that it is longer echo spacing and changing also TE in the middle of k-space. Also users might not notice to lower TF and the chain moves easily too long-blurring. Problem is also that Siemens don’t show you what k-space filling it uses (linear, asymmetric) or is the TE-time it shows the equivalent or effective? Or maybe I haven’t found them or just don’t have knowledge.. For example in blade-sequences you want high turbofactor to widen the blade and also want low ES- otherwise it won’t work correctly, artefacts. If you have normal SAR-mode and 180 refocusing pulse you can lower SAR-mode to low, that reduces SAR about 33% ( 1ms/1,5ms=0,67). Reducing flip to 140 and keeping normal SAR mode reduces SAR more, about 39,5% ( (140^2):(180^2)=0,605 ) and you can keep lower Echo spacing. Reducing Flip to 140 lowers signal only to 94% of it’s maximum (sin70).
I have a question to Matt, about hyperecho. Using it in Siemens mri I don’t have a clue when choosing hyperecho, what the refocusing flip angle means then? If I put 100. Is it lowest , middle or highest flip in the tf-chain? In normal TSE if I lower re-flip under 120 it automaticully puts hyperecho on, but like I mentioned- what does angle mean then?
Thanks for Watching and for providing feedback about Scanwise on philips. As for HyperEcho thats a great question. We know that Flip angle of the refocusing pulse varies across the echo train, forming the hyperecho but how does that effect the flip angle that is selected? Great question we have to see if we can get an answer for that for you. Thanks again for the engagement and great questions.
Such a great episode
This was great! Very informative! Thank you.
I can't wait to hear what you do next
Matt this was very informative!!
Awesome show
Very nice
this is soo goo!
In reference to conversations at the 29 min mark…. Some active implants actually require you to make sure a patient doesn’t have a temperature higher than xx and they are say no blankets.
its great
good...
Keep it up
Great episode fellas!
lol matt is one of my instructors
OH YEAH
wow so deep
Killing I love it ????
Magic.... ✨????
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