PROBLEM TO BE SOLVED: To reduce amount of data to be stored for extracting an internal organ region and also accurately extract the internal organ region.SOLUTION: When an internal organ name of a desired internal organ to be extracted is inputted (S71), a medical image processing apparatus 3 retrieves a dividing condition table 51 of a storage device 13 by an input internal organ name of the desired internal organ to be extracted as a key to decide a dividing condition (S72), decides a threshold for extracting an internal organ region so that the number of pixels included in a first dividing region is maximum and/or the number of pixels included in a second dividing region is minimum for a medical image 2 divided based on the decided dividing condition (S73), and conducts the threshold processing according to the decided threshold to extract the internal organ region of the medical image 2 (S74).COPYRIGHT: (C)2012,JPO&INPIT【課題】臓器領域を抽出するために記憶するデータ量を削減し、かつ正確に臓器領域の抽出を行う。【解決手段】所望の抽出対象臓器の臓器名が入力されると(S71)、医用画像処理装置3は、入力された所望の抽出対象臓器の臓器名をキーとして記憶装置13の分割条件テーブル51を検索し、分割条件を決定し(S72)、決定された分割条件に基づいて分割される医用画像2に対して、第1の分割領域に含まれる画素数が最大、および/または第2の分割領域に含まれる画素数が最小となるように、臓器領域を抽出するための閾値を決定し(S73)、決定された閾値に従って閾値処理を行い、医用画像2の臓器領域を抽出する(S74)。【選択図】図7
