Focus on MR Optimisation - Acceleration Techniques

𝙂𝙧𝙖𝙥𝙥𝙖? 𝘾𝙤𝙢𝙥𝙧𝙚𝙨𝙨𝙚𝙙 𝙎𝙚𝙣𝙨𝙞𝙣𝙜?! 𝙒𝙝𝙖𝙩 𝙖𝙧𝙚 𝙩𝙝𝙚 𝙗𝙚𝙨𝙩 𝙖𝙘𝙘𝙚𝙡𝙚𝙧𝙖𝙩𝙞𝙤𝙣 𝙩𝙚𝙘𝙝𝙣𝙞𝙦𝙪𝙚𝙨 𝙞𝙣 𝙈𝙍𝙄???

Dear MRI Community,

It’s time for a new video dedicated to optimising image quality on our MR scanners. Today, we are shifting our focus towards acceleration techniques, not only evaluating them based on the image quality they can produce but also considering their impact on scan time. Some acceleration techniques may perform better than others when it comes to reducing scan time, but at what cost to image quality?! Let’s explore this together in our latest educational video.

Thank you for your continued support, and we look forward to connecting with you on all of our platforms 🧲

#MRI #MagneticResonanceImaging #Radiographer #Radiologist #MRIradiographer #MRItechnologist #Acceleration #ParallelImaging #CompressedSensing #ImageOptimisation #MRIcommunity

[dvalled]

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!

[vladimirtt]

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.

[scottgloverjohnson]

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.

[عباسالنويره]

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.

[anniesshenanigans]

Thank you. But it's frustrating when the rads want the longer sequences because they are 'old school'.