MEDICAL OBSERVATION SYSTEM, MEDICAL OBSERVATION DEVICE AND MEDICAL OBSERVATION METHOD

A three-dimensional information generation unit (14) generates a three-dimensional map (D(X, Y, Z)) (three-dimensional information) regarding a surgical field, based on a surgical field image (K(x, y)) captured by an imaging device (42a). A region-of-interest setting unit (20) (setting unit) then sets at least one region-of-interest in the surgical field image (K(x, y)) captured at a predetermined timing. Based on the three-dimensional map (D(X, Y, Z)) and the position of the region-of-interest set by the region-of-interest setting unit (20), a region-of-interest estimation unit (22) (estimation unit) estimates an existence position of the region-of-interest from within the surgical field image (K(x, y)) captured at a timing different from the predetermined timing. Subsequently, a zoom processing unit (26) (magnified image generation unit) generates a magnified surgical field image (L(x, y)) in which the estimated region-of-interest is magnified by a predetermined magnification, and a display control unit (40) outputs at least the magnified surgical field image (L(x, y)).