Conventional MR images are two-dimensional representation of intensities occurring at a given level or slice. These images may be presented in axial, coronal and sagittal planes. The most frequent plane used in fMR is the axial plane which shows the localization of structures or activation in a X (right to left) and a Y (anterior to posterior) axes. Since these images are usually obtained in oblique planes it is difficult to know the precise level in the remaining Z (cranio-caudal) axis.

3D rendering allows us to present images with a volumetric appearance. These images have proven to be useful to guide surgical resections.

Types of 3D rendering

Orthogonal Views are the simultaneous presentation of a structure in the X, Y and Z axes.

Surface Rendering is the presentation of a structure as if it were seen by an external observer.

3D-Rendering + Orthogonal View is the combination of orthogonal views and surface rendering.

Triple Rendering is when 3 procedures are superimposed on each other, such as MRV, fMR and surface rendering.

Animation of 3D volumes