4 ms·
> Bigger magnetic fields have been made before, but they aren’t practical or reliably reproducible, because they rely on rather dangerous amounts of TNT. TNT a
by wumms 8y ago
> Bigger magnetic fields have been made before, but they aren’t practical or reliably reproducible, because they rely on rather dangerous amounts of TNT.
TNT aside, would one survive a MRI at 1200 T? I estimate the resolution would be around 1/10th of a nerve fiber - would that be small enough to _really_ scan a brain?
- bcaa7f3a8bbc 8y agoCurious about it, too. A quick search got this from the WHO. > For static magnetic fields, acute effects are only likely to occur when there is movement in the field, such as motion of a person or internal body movement, such as blood flow or heart beat. A person moving within a field above 2 T can experience sensations of vertigo and nausea, and sometimes a metallic taste in the mouth and perceptions of light flashes. Although only temporary, such effects may have a safety impact for workers executing delicate procedures (such as surgeons performing operations within MRI units). > Static magnetic fields exert forces on moving charges in the blood, such as ions, generating electrical fields and currents around the heart and major blood vessels that can slightly impede the flow of blood. Possible effects range from minor changes in heartbeat to an increase in the risk of abnormal heart rhythms (arrhythmia) that might be life-threatening (such as ventricular fibrillation). However, these types of acute effects are only likely within fields in excess of 8 T. https://www.who.int/peh-emf/publications/facts/fs299/en/ https://www.who.int/peh-emf/publications/facts/fs299/en/