Scan Plane

The planes used in MR imaging that can be selected are axial, sagittal, coronal, oblique, or 3-Plane.

Orthogonal planes are perpendicular to one another. Axial, sagittal, and coronal planes are all perpendicular to each other and are therefore referenced as orthogonal planes.

Oblique planes are scan planes prescribed in any orientation other than the axial, sagittal, and coronal planes. A simple oblique is a plane that has been tilted in just one direction from an orthogonal plane. A complex oblique is a plane that has been tilted in two directions from an orthogonal plane. Oblique prescriptions can increase Time to Repeat or Repetition Time (TR), Time of Echo (TE), Field Of View (FOV), and slice thickness, and decrease the matrix selection and number of slices.

The system annotates axial, sagittal, and coronal images as oblique if you select the oblique plane during scan prescription.

The scan plane is selected from the Scan Plane menu. Alternatively, delete the text in the Scan Plane field and type in the following shortcuts: A for axial, C for coronal, or S for sagittal. These entries are not case sensitive.

Table 1. Oblique plane image legend

Number	Description
1	Coronal and coronal oblique plane
2	Axial and axial oblique plane
3	Sagittal and sagittal oblique plane