A system for displaying a curved planar reformation plane, comprising: - an imager configured to provide imaging data of an anatomical structure; - a determiner configured to determine a line through the anatomical structure; - a curved planar reformatter configured to: - determine the curved planar reformation plane at a plurality of positions along the line; and - determine for one or more voxels in the imaging data the likelihood that the voxel(s) will be comprised in more than one location of the reformation plane; - a display configured to display a representation of the anatomical structure in the reformation plane, and further configured to distinguish on the display the one or more voxels if the likelihood deviates from a predetermined value or range of values, wherein: - the curved planar reformatter is further configured to: - determine a plurality of distances between the one or more voxels and a plurality of positions along the line, and determine the likelihood using the number of positions where the distance deviates from a second predetermined value or range of values. - an imager configured to provide imaging data of an anatomical structure; - a determiner configured to determine a line through the anatomical structure; - a curved planar reformatter configured to: - determine the curved planar reformation plane at a plurality of positions along the line; and - determine for one or more voxels in the imaging data the likelihood that the voxel(s) will be comprised in more than one location of the reformation plane; - a display configured to display a representation of the anatomical structure in the reformation plane, and further configured to distinguish on the display the one or more voxels if the likelihood deviates from a predetermined value or range of values, wherein: - the curved planar reformatter is further configured to: - determine a plurality of distances between the one or more voxels and a plurality of positions along the line, and determine the likelihood using the number of positions where the distance deviates from a second predetermined value or range of values. - determine the curved planar reformation plane at a plurality of positions along the line; and - determine for one or more voxels in the imaging data the likelihood that the voxel(s) will be comprised in more than one location of the reformation plane; - a display configured to display a representation of the anatomical structure in the reformation plane, and further configured to distinguish on the display the one or more voxels if the likelihood deviates from a predetermined value or range of values, wherein: - the curved planar reformatter is further configured to: - determine a plurality of distances between the one or more voxels and a plurality of positions along the line, and determine the likelihood using the number of positions where the distance deviates from a second predetermined value or range of values. - the curved planar reformatter is further configured to: - determine a plurality of distances between the one or more voxels and a plurality of positions along the line, and determine the likelihood using the number of positions where the distance deviates from a second predetermined value or range of values. - determine a plurality of distances between the one or more voxels and a plurality of positions along the line, and determine the likelihood using the number of positions where the distance deviates from a second predetermined value or range of values.