Great into to parallel imaging! I'd like to add that PI techniques, at least for some sequences, can affect your min/max TE selections or selectable options. I think an interesting case, at least on the Siemens scanners, is the HASTE sequence. Watch what happens to your TE's when you swap between Integrated, TSE/Separate, GRE Separate, and different iPAT factors. I find swapping between GRE separate and integrated a helpful move in cardiac cine imaging when patient BH capacity is really limited; you can knock off up to 3-4 seconds sometimes and reduce the total number of heartbeats required for a full retro loop. Still needs a good quality BH, but that's maybe easier to achieve when it's only 5 seconds long and you want to maintain temporal resolution.
@everything-mri
10 күн бұрын
Thank you so much Scott. It is amazing having someone with plenty of experience in the field sharing tips and tricks for workflow optimisation. In regards to acceleration techniques in CMR, I think that may deserve an entire separate video! That I definitely something we will consider for the future, because as you said it can have a lot of implications from the BH perspective, and as a consequence on overall scan time and image quality.
@vladimirtt7553
11 күн бұрын
Hope its just the part one of the accel techniques review. Definitely must introduce the CAIPIRINHA (free for all siemens scanners now), the SMS (opens with the same option package as CS). One important thing wasn’t explained in this vid is that increasing parallel aquisition (and thus speeding up the scan time) increases the motion sensitivity, and increases the possibility of aliasing-like artefacts due to k-space measuring errors in high PAT levels. Especially on old systems and low channel coils.
@everything-mri
10 күн бұрын
Thank you for watching and commenting on the video. There will definitely be a part 2. You are right; this video aims to be an introduction to the topic. It provides examples of some of the most commonly used acceleration techniques routinely. There are many others, which we will cover in future videos, along with new comparisons. Thank you also for bringing up that point. We have personally experienced aliasing-like artifacts when increasing the acceleration factor with relatively older scanners. While this doesn't happen often, we agree it's important to mention. So, thank you for adding it to the discussion. Which scanners are you using if we can ask?
@vladimirtt7553
10 күн бұрын
@@everything-mri I’m application specialist so I have an experience with many different Siemens scanners, from Symphony/Harmony to Vida :)
@everything-mri
10 күн бұрын
@@vladimirtt7553 Oh fantastic! If you have any other useful tips or, if there are things that we did not cover that you believe it may be worth to mention, please feel free to share them here. Many people will benefit a lot from it 🙏
@dvalled18
9 күн бұрын
I use routine TOF with CS and a total factor of 6 with the same voxel size you have in about 3 min with our VIDA and the result is amazing!
@everything-mri
9 күн бұрын
Thank you for sharing this. Would you mind sharing some additional parameters? I think 3 minutes is a great achievement!! Especially with optimal image quality
@dvalled18
3 күн бұрын
@@everything-mri just standard parameters... Phase resolution 100%, slice resolution 80% and voxel size 0,4 x 0.4 x 0,5 in 3min 15sec
@saindreepillay7932
10 күн бұрын
Thank you
@everything-mri
10 күн бұрын
Our pleasure 🙏🏻
@anniesshenanigans3815
11 күн бұрын
Thank you. But it's frustrating when the rads want the longer sequences because they are 'old school'.
@everything-mri
11 күн бұрын
Thank you for watching and sharing your thoughts. We definitely understand your frustration! Many concerns about "shorter" scan times often come from a lack of familiarity with techniques like GRAPPA and compressed sensing. Part of our role is to help educate MR users on the benefits and limitations of these techniques. With more awareness, we hope these practices will be more widely adopted routinely!
@anniesshenanigans3815
11 күн бұрын
@@everything-mri Where I work we have 13 Siemens 3T Skyra scanners. So numerous techs experiencing the same frustrations. Some know the parameters very well and some are just there for a paycheck.
@dvalled18
9 күн бұрын
@@anniesshenanigans3815 13 Skyra?!?! Where do you work if I can ask?
@anniesshenanigans3815
9 күн бұрын
@@dvalled18 Radiology Regional in SWFL
@dvalled18
8 күн бұрын
@@anniesshenanigans3815 Florida?
@عباسالنويره
9 күн бұрын
How do I try to adjust the parameter on an open 0.35 device? I know that it does not work well with MRA in the required way, but I want to get the best image on this device despite its weakness.
@everything-mri
9 күн бұрын
Hello. Thank you for watching. There is a number of factors that we need to consider. First thing which is the manufacturer you are working. Different manufactures have different acceleration techniques which may have slightly dissimilar ways of filling the K-space and, therefore, also different performance. Also, we always need to consider the channels of the coil you are using. The SNR level will play a key role on this. The fact that you are working on a 0.35T may probably limit the range of adjustments that we can make on acceleration without significantly impacting the SNR. For example, on a 3T scanner, since there is an abudance of SNR, you can push the scanner using greater acceleration factors. On a 0.35T we may not have that flexibility, in this sense.
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