Provided are a medical image processing method, device, system, and program for extracting a linear-tissue probability image, while taking into consideration spatial continuity. With respect to a 3D medical image which is an acquired 3D image (S101), a processing unit: determines a probability Pf which indicates whether the pixel value of each pixel is likely to be linear, on the basis of local shape analysis executed in accordance with the pixel value of each pixel (S103) determines a probability Pi which indicates whether each pixel is likely to represent a target organ, on the basis of the pixel value of each pixel and determines a probability Pc by accumulating the probabilities that surrounding linear-tissue pixels pass over a processing-target pixel, such determination made on the basis of the continuity of each pixel. The processing unit adds, or weights and adds, the product of probability Pi and probability Pc with probability Pf, and thereby determines a linear-tissue probability P which indicates whether each pixel is likely to be linear, and the processing unit generates a linear-tissue probability image in accordance with the linear-tissue probability P, and displays the same on a display unit and/or stores the same in a storage unit.Linvention concerne un procédé, un dispositif, un système, et un programme de traitement dimages médicales qui permettent dextraire une image de probabilité de tissu linéaire, tout en tenant compte de la continuité spatiale. Par rapport à une image médicale en 3D qui est une image 3D acquise (S101), lunité de traitement : détermine une probabilité Pf qui indique si la valeur de pixel de chaque pixel est susceptible dêtre linéaire, sur la base de lanalyse de forme locale effectuée en fonction de la valeur de pixel de chaque pixel (S103) détermine une probabilité Pi qui indique si chaque pixel est susceptible de représenter un organe cible, en fonction de la valeur de pixel de chaque pixel et détermine une probabilité Pc p
