In the 1990s, it was discovered you could use the same machines in a different mode, and in that mode, you could make microscopic blood flow movies from hundreds of thousands of sites independently in the brain.
上世纪90年代，人们发现 可以在不同模式下运用MRIs 在这一模式下，我们可以分别纪录大脑内 成千上百个小区域中任何一个的微观血液流动