PROBLEM TO BE SOLVED: To provide a medical image processing apparatus, a therapeutic system and a medical image processing method each enabling a fluoroscopic radiation dosage to be reduced.SOLUTION: The medical image processing apparatus according to the embodiment comprises a calculation part and a detection part. The calculation part sets, for every pixel under consideration, a first region including two or more first pixels around the pixel under consideration, and a second region including one or more second pixels different from the two or more first pixels, for a fluoroscopic image obtained through fluoroscopy on the inside of a subject, and calculates the likelihood that the two or more first pixels are closer to one another and the values of which become larger as the pixel values of the two or more first pixels and also the pixel value of the one or more second pixels are farther apart from one another. The detection part detects the position of an object inside the subject on the basis of the likelihood of each pixel under consideration.SELECTED DRAWING: Figure 1【課題】透視用の放射線による被曝量を低減させることができる医用画像処理装置、治療システム及び医用画像処理方法を提供する。【解決手段】実施形態の医用画像処理装置は、算出部と、検出部と、を備える。算出部は、被検体の内部を透視した透視画像に対し、注目画素毎に、注目画素の周辺の２以上の第１画素を含む第１領域と、２以上の第１画素とは異なる１以上の第２画素を含む第２領域とを設定し、２以上の第１画素の画素値が互いに近く、かつ２以上の第１画素の画素値と１以上の第２画素の画素値とが離れているほど、値が大きくなる尤度を算出する。検出部は、注目画素それぞれの尤度に基づいて、被検体の内部のオブジェクトの位置を検出する。【選択図】図１
