5. Imaging study schema. An imaging study consists of one or more MRI exams, and possibly an FMRI study. An MR Exam consists of one or more MR Series, each of which consists of a set of MR Slice. The slices can be assembled into an Aligned 3-D Volume. The volumes are used to fit a radial model containing knowledge of expected shape, which is then used to derive a surface model. A Scene consists of several surface models showing anatomy, veins and arteries. A Rendering is a 2-D snapshot of a surface model.