of Nomenclature and Positioning

Figure 54 Tomographic planes.

A sagittal section denotes any section parallel to the median section. The median section is sometimes denoted the mid-sagittal section.

A paramedian section is a sagittal section close to the median section.

A frontal section (Figure 54B) denotes any vertical section perpendicular to the median section. In diagnostic imaging, frontal sections are commonly denoted coronal sections, because they are about parallel to the plane of the coronal suture.

A transversal section (Figure 54C) is perpendicular to both the coronal and the sagittal sections. It is sometimes denoted a horizontal section, but the established term in radiology is an axial section, so denoted because it is the image that would be produced if a transversal slice of the body was conventionally imaged by an X-ray beam oriented along the axis of the body.

In axial MR scanning of the head, the standard tomographic planes are parallel to the orbitomeatal plane

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