Image spaces including processed images in these spaces: ASL space (Ω
ASL), T1w space (Ω
T1w), and the template space (Ω
Template). Transformations between the image spaces are indicated by Q, R, S, T, and U. The arrows are pointing from the fixed to the moving domain. Different subjects are represented by i and j. From all T1wi, a template space image (T1wj) is calculated. In each image space, the dotted boxes represent the processed images.