You need at least 10 picometer percision to go down to the cell level (1.5L &#x2F; 86 billion neurons), MRIs are 1mm according to the talk dcunit3d posted [0].<p>[0] <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=HdrSZtB0uX0" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=HdrSZtB0uX0</a>