The orthogonal MPR window
Multiplanar reconstruction (MPR) is the simplest method of reconstruction. A volume is built by stacking the axial slices one behind the other. Multi-planar reconstruction (MPR) involves generating perspectives to the stack of axial slices so that coronal and sagittal images can be generated. Coronal and sagittal reconstructions are referred to as Orthogonal MPRs because the perspectives generated are from planes of image data which are at right angles to each other.
In a coronal reconstruction, an image stack is rotated so that the z-axis becomes the vertical axis and a stack of images is reconstructed using parallel planes of voxels arranged from the patient's anterior to posterior surface. The reconstructed slices are displayed from the patient's anterior to their posterior surface with the patient's head towards the top of the slices and their right hand side on the left of the slices.
In a sagittal reconstruction, additional rotations of the image stack are performed so that a patient's left-to-right slice sequence can be generated. The reconstructed slices are displayed from the patient's left to right side, with their head towards the top and their anterior surface towards the left of the slices.
The orthogonal MPR window is accessible via the menu "Utilities
AdvancedOrtho MPR Window".The Othogonal MPR Window
The orthogonal MPR window contains three viewports. The first one displays the axial view, the second one displays the coronal view and the third one displays the sagittal view. The displayed planes are indicated by lines. The user can change these planes by moving the lines.
