k-space trajectory

K-space trajectory describes the path that data points follow in the process of magnetic resonance imaging (MRI) as they are collected. Think of it as a map that guides how the MRI scanner samples signals from the body in frequency space, which is then transformed into detailed images. Different trajectories—like lines, spirals, or circles—affect the speed and quality of image acquisition. Properly designed trajectories ensure accurate, high-resolution images while optimizing scan times, balancing the efficiency of data collection with the clarity of the resulting MRI images.