MR images are composed of a three-dimensional grid of voxels that are assigned signal values throughout the image. Since voxel values in MRI scans have arbitrary units (unlike CT scans, which are characterized by pixel values that are directly proportional to the density of the imaged tissue),...
The Hunger Games. She’s read all the books, seen all the movies and episodes. She can’t remember what they were about, but that just makes it better. Each time she rereads or rewatches something, it’s like experiencing it for the first time. (Here’s another thing to envy about...
题目In ancient China,when friends or relatives were separating,they would pick a willow twig(柳条) and give it to the person who was leaving.This was to express their wish for him to stay.In Chinese,the word for"willow"is pronounced the same as the word for"stay."...