Are brain movements and brain topographic maps a matter of time?

Accurately speaking, it is not two kinds of equipment, the electroencephalograph is a mechanical equipment, and the brain topography instrument is an electronic equipment. They are all used for EEG examination, one is to generate brain wave shape, and the other is to show the topographic map (three-dimensional) analyzed by brain wave shape.

However, at present, in China, the two names actually refer to the same equipment, because mechanical EEG machines are rarely used now, and they are all computer-based EEG workstations, which can record brain waves and analyze EEG topographic maps, so they are the same equipment, just two names, and the domestic medical market is not very standardized and the division is not very clear.