The 3D nature of volume images, when isotropic, allows for simple and efficient computation of images that lie along the nonacquired orthogonal orientations of the volume [16,54]. This is demonstrated in Fig. 1 for a 3D volume image of the head from a 3D MRI scan acquired in the transaxial plane. Implementations of multiplanar reformatting techniques on modern computers allow interactive generation and display of coronal and sagittal images, as well as the transverse images. Display of multiplanar images usually consists of multipanel displays, as demonstrated in Fig. 1. Display of a sequence of adjacent planar images without position change on the screen provides an effective mechanism for visualization of section-to-section change in structures, often augmenting the visual synthesis of the 3D structures. Other useful techniques for displaying orthogonal sections of a volume image are depicted in Fig. 2. The left panel shows intersecting orthogonal sections, with interactive slider control of intersection point, viewing angle, slice number, and scale. In the right panel the volume image is displayed as if visualizing the actual cube of data at a particular orientation and dissection level. This volume image can also be manipulated interactively with sliders to control orientation while also specifying which image along each orthogonal direction (dissection) is displayed.
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