Where a model looks is not why it decides
Explainability tools tell you which features a model used. They rarely tell you which ones mattered.
TPE: finding the turning point in disease progression
Disease trajectories are not lines. They bend, and the bend is where the clinical meaning hides.
From noise to PET: diffusion is winning, but is it really?
Diffusion methods have overtaken GANs for generating images. Turning MRI into PET is within reach, yet a realistic picture is not a trustworthy one.
Cerebral Microbleeds
A handful of dark specks, a few millimeters across, scattered anywhere in the brain. That is a cerebral microbleed, and it is one of the hardest things in neuroimaging to pin down. …
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