PROBLEM TO BE SOLVED: To correctly indicate an observation range of an observation device such as an endoscope.SOLUTION: A medical device comprises: an imaging part which is disposed on an insertion part, images a surface of inside of a subject, and outputs an imaged image a target point setting part for setting plural target points on the image, on the imaged image a distance calculation part for determining for every actual target point, a distance between a view point of the imaged image, and each actual target point on the surface in inside of the subject corresponding to each of the plural target points on the image a view range calculation part for determining a coordinate of each actual target point in which the view point is standard, and determining a coordinate of the imaging range on the surface in inside of the subject based on a plane to which three or more actual target points belong, and the view angle of the imaging part a coordinate system conversion part for converting the coordinate of the imaging range determined by the view range calculation part into a coordinate system of a model image in inside of the subject and an image creation part for creating an image for displaying an index which indicates the imaging range, on the model image.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】内視鏡等の観察装置の観察範囲を正確に示す。【解決手段】 医療装置は、挿入部に設けられ被検体内部の表面を撮像して撮像画像を出力する撮像部と、撮像画像上において複数の画像上対象点を設定する対象点設定部と、前記撮像画像の視点と前記複数の画像上対象点にそれぞれ対応する前記被検体内部の表面上の複数の実対象点との間の距離を前記実対象点毎に求める距離算出部と、前記視点を基準とした前記実対象点の座標を求めると共に、3点以上の前記実対象点が属する平面と前記撮像部の視野角とに基づいて前記被検体内部の表面上における撮影範囲の座標を求める視野範囲算出部と、前記視野範囲算出部が求めた撮影範囲の座標を前記被検体内部のモデル画像の座標系に変換する座標系変換部と、前記モデル画像上に前記撮影範囲を示す指標を表示するための画像を生成する画像生成部と、を具備する。【選択図】図1
