Preprocessing

In neuroimaging studies, a number of preprocessing steps are often applied to MRI data to correct for artifacts that arise during acquisition. This chapter discusses the main options for arterial spin labeling (ASL) data, along with some of the specific ways in which these can improve the data, but can also interact with subsequent analysis steps. The chapter focuses on motion correction, distortion correction, registration, and spatial filtering as the main preprocessing options commonly applied to perfusion images.