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The state of the art MRI stuff uses "compressed sensing" -- essentially image completion in some domain or another. Presumably, carefully designed to not hallu
by nullc 2y ago
The state of the art MRI stuff uses "compressed sensing" -- essentially image completion in some domain or another. Presumably, carefully designed to not hallucinate details or one would hope.
There isn't necessarily a particularly neutral choice here: the MRI scan isn't in the pixel domain, artifacts are going to be 'weird' looking-- e.g. edges that move during the scan ringing across the whole image.
- CooCooCaCha 2y agoCompressed sensing is far more mathematically rigorous.
- nullc 2y agoI don't think we know what's in the black box here. It could be an equivalent relatively unopinionated regularizer ("the pixel domain will be locally smooth, to the extent it has edges they're spatially contiguous") or it could be "just look up the most similar image from a library and present that instead" or anywhere in between. :)
- CooCooCaCha 2y agoThey specifically said they use deep learning which implies a sizeable neural network.
- phkahler 2y agoBut they're using it to eliminate stray or environmental EMI from the RF signals. That might not create fake stuff at the voxel level. Depends on the specifics.