A medical image processing apparatus, comprising: a controller including circuitry configured to: receive a first image (R-image) and a second image (L-image) generated by an imaging section of a surface of a surgery region and an important object; generate depth information for each pixel of a medical image of the surgery region by using the first image (R-image), the second image (L-image) and the principle of triangulation, determine a position of a distal end of the important object within the medical image, estimate a region of interest within the medical image adjacent to the important object, control display of the region of interest, characterised in that the circuitry is further configured to: determine positions of the surface of the surgery region using the depth information, and determine a direction pointed by the important object; wherein the region of interest is estimated as an intersection point of an extension line and the positions of the surface of the surgery region, and the extension line is obtained by extending the direction pointed by the important object beyond the position of the distal end of the important object. a controller including circuitry configured to: receive a first image (R-image) and a second image (L-image) generated by an imaging section of a surface of a surgery region and an important object; generate depth information for each pixel of a medical image of the surgery region by using the first image (R-image), the second image (L-image) and the principle of triangulation, determine a position of a distal end of the important object within the medical image, estimate a region of interest within the medical image adjacent to the important object, receive a first image (R-image) and a second image (L-image) generated by an imaging section of a surface of a surgery region and an important object; generate depth information for each pixel of a medical image of the surgery region by using the first image (R-image), the second image (L-image) and the principle of triangulation, determine a position of a distal end of the important object within the medical image, estimate a region of interest within the medical image adjacent to the important object, control display of the region of interest, characterised in that the circuitry is further configured to: determine positions of the surface of the surgery region using the depth information, and determine a direction pointed by the important object; wherein the region of interest is estimated as an intersection point of an extension line and the positions of the surface of the surgery region, and the extension line is obtained by extending the direction pointed by the important object beyond the position of the distal end of the important object. determine positions of the surface of the surgery region using the depth information, and determine a direction pointed by the important object; wherein the region of interest is estimated as an intersection point of an extension line and the positions of the surface of the surgery region, and the extension line is obtained by extending the direction pointed by the important object beyond the position of the distal end of the important object.