1. A method for selecting a seed area for tracking nerve fibers in a brain, the method comprising: performing a registration of an atlas which shows a plurality of areas which are included in the brain and image data which relates to the brain; displaying a brain area list with respect to the plurality of areas; selecting a first area from the atlas based on a first user input with respect to the brain area list; extracting, as the seed area, an area of the image data which corresponds to the first area, based on a result of the performing the registration; and generating a first image which corresponds to the seed area from the image data, and displaying the generated first image, wherein the generating and displaying the first image comprises: sequentially calculating a plurality of nerve fibers which pass through the seed area; and updating the first image based on a result of the calculating, wherein the first image includes image data which corresponds to at least one of the calculated plurality of nerve fibers.