Abstract: A PC (1) comprises a tomographic image information acquisition section (6), a memory (9), a volume rendering calculator (13), a display unit (2), a mouse (4), and a voxel label setting section (18). The tomographic image information acquisition section (6) acquires tomographic image information. The memory (9) stores voxel information about the tomographic image information. The volume rendering calculator (13) samples voxel information in a direction perpendicular to the line of sight, on the basis of the voxel information. The display unit (2) displays calculation results from the volume rendering calculator (13). The mouse (4) inputs cutting instructions for a liver (22) displayed on the display unit (2). The voxel label setting section (18) displays the status of the liver (22) after cutting using the cutting instructions from the mouse (4), and displays blood vessels (23) inside the liver (22) included in a cut portion (C), in a pre-cut state even after cutting.

Abstract: This resection simulation apparatus comprises a tomographic image information acquisition section (6), a memory (9) that is connected to this tomographic image information acquisition section (6), a volume rendering computer (13) that is connected to this memory (9), a display (2) that displays the computation result of this volume rendering computer (13), and an input section (4) that performs resection designation with respect to a display object displayed on this display (2). The volume rendering computer (13) samples voxel information in a direction perpendicular to the line of sight from the voxel information stored in at least the memory (9), and a depth detector (15) measures the ray casting scan distances for all points found in movement over the resection designated points.