Provided is an image diagnostic device comprising a plurality of transceiver units, whereby, on the basis of either a difference in distance in the axial direction or a difference in angle in the circumference direction between each of the transceiver units, it is possible to correct the location of a generated tomographic image. The present invention is an image diagnostic device which, using signals which are obtained by the axial movement of a transceiver unit wherein an ultrasound transceiver unit and an optical transceiver unit are positioned while said transceiver unit rotates within a lumen of a body to be measured, generates an ultrasound tomographic image and an optical tomographic image, said image diagnostic device generating ultrasound tomographic image data and optical tomographic data of a corrective jig having a reflecting unit computing, on the basis of location information of the reflecting unit included in the generated ultrasound tomographic image data and location information of the reflecting unit included in the generated optical tomographic image data, a difference in angle in the circumference direction about the axis between the ultrasound transceiver unit and the optical transceiver unit and using same as a correction value when location correcting and displaying either the ultrasound tomographic image or the optical tomographic image.La présente invention porte sur un dispositif de diagnostic dimage comprenant une pluralité dunités démetteur-récepteur, par lesquelles, sur la base de soit une différence de distance dans la direction axiale, soit une différence dangle dans la direction de circonférence entre chacune des unités démetteur-récepteur, il est possible de corriger la position dune image tomographique générée. La présente invention porte sur un dispositif de diagnostic dimage qui, à laide de signaux qui sont obtenus par le déplacement axial dune unité démetteur-récepteur dans laquelle une unité démetteur-récepteur ultrasonore et un
