<classify> MRI gyina abɔde ho nimdeɛ a wɔferɛ no nuclear magnetic resonance NMR gyinapɛn so, na Felix Bloch ɔyɛ adwuma wɔ Stanford University ne Edward Purcell ofi Harvard University na wɔ huu ho ade wɔ 1930s mu.  <topic>: sciencetechnology 