Hi, Not an MRI Tech, but I build them for a living and im a nerd. Wicked happy to find this channel!
@Zone3Podcast
3 жыл бұрын
Thank you for your Support. 😁
@reginaldbattle3723
3 жыл бұрын
This is the good stuff! Please keep them coming, Z3P guys. 👍
@Zone3Podcast
3 жыл бұрын
We really appreciate you. Thanks for sticking with us. We have plenty more to come.
@breakfastjak
2 жыл бұрын
Love the animations and concise explanations. Subscribed!
@Zone3Podcast
2 жыл бұрын
Thank you for you kind words and support. 😁
@SpinUpDownUnder
3 жыл бұрын
Noise is the same form as Signal Signal is information about the object, but noise has no information. Nooise with information is an artefact
@Dr_FeelG00d12
3 жыл бұрын
Great video guys
@Zone3Podcast
3 жыл бұрын
Thank you, we really appreciate the feedback and love. 😁
@charliemcintyre6902
3 жыл бұрын
Great illustration
@badrlinux6786
3 жыл бұрын
well done 👌
@Zone3Podcast
3 жыл бұрын
Thank you so much 😀
@TAHA-TOUABA-RADIOGRAPHER
10 ай бұрын
thank you so much pro
@speeddrift5011
3 жыл бұрын
Very nice animations, looks great! Based on you last example why would we not decrease the rBW always?
@Zone3Podcast
3 жыл бұрын
That is a Great Question. The short Answer is too narrow of a rBW could create artifact issue. A narrow rBW can lead to spatial distortion and chem shift artifact. If you have the 5th edition of MRI in Practice, in Ch 7 on page 220-221, there’s a Scanning Tip that goes into this with much more detail. If you do not have it, I highly recommend it. It has a lot of "Scan Tips" and "Learning Tips" that you just can’t google. Thanks for the question and support. Hope this helps.
@Zone3Podcast
3 жыл бұрын
That's was the text book answer. Here the MRI technologist practical answer. Usually the vendors will have the sequence parameters like receive BW already optimize for that pulse sequence type, in their Tree. If I'm going to deviate from that, it's a minimal decrease for a slight boost in signal. ( Which depending on the vendor that can be from 50 kHz to 30kHz or 500Hz/Px to 350Hz/Px) Realistically we find ourselves increasing rBW for metal artifact reduction more often the decreasing it to boost the signal. I think the flashlight example just make it easier to visualize this trade-off.
@bobby9794
3 жыл бұрын
@@Zone3Podcast Yeah didn't make any sense to me why Signal went down when I increased my bandwidth but seeing it like that totally helped. Thanks Guys.
@cobydollar390
3 жыл бұрын
@@Zone3Podcast Come man Give us the Juice!! What does page 220-221 say. How can I utilize rBW to better optimize my Sequences?
@Zone3Podcast
3 жыл бұрын
Ok here comes the 🧃 . Lol It's always good to befriend an MRI physicist. Thank you Dr. Bryan for this info below. So here are things to look for with respect to optimizing bandwidth: If you see too much T2 or T2* blurring then you need to reduce echo train duration -> increase BW. Alternatives: RF fast, gradients fast, reduce turbo factor, increase partial Fourier. If you see too much noise then you need to improve SNR -> decrease BW. Alternatives: increase averages, increase phase OS, increase TR, decrease TE. If you see too much in plane distortion then you need to increase gradients -> increase BW. Alternatives: use iPAT, reduce FOV, increase base resolution, use WARP. If you see too much chemical shift then you need to increase BW. Alternatives: fat suppression. If you need to reduce TE or TR for other reasons then you need to increase BW. Alternatives: way too many to list, most of them will be more effective than changing BW except when you are doing very short TE gradient echo sequences. If you don’t see any of the above issues, then your bandwidth is good enough.
@mihaimoldo
9 ай бұрын
Noise is our limited capacity to measure information accurately.
Пікірлер: 20