Notice the tram-track like cortical hyperdensity in the right parietal lobe.

Answer: cortical laminar necrosis.

1 week is on the short side, but if you have a cortical insult and only the cortex is involved (due to the high metabolic demand of the cortical neurons), you can get MRI and CT changes as shown

reference: https://radiopaedia.org/articles/cortical-laminar-necrosis