To accurately calculate a mammary gland content in the mamma in a mammary gland content acquisition device, method and program.SOLUTION: A subject information acquisition part 37 of a mammary gland content calculation part 32 acquires a thickness and a mammary gland content of the mamma M based on a low voltage image GL. An absorption coefficient acquisition part 38 acquires an absorption coefficient of fat and an absorption coefficient of a mammary gland with reference to relationships between the thickness of the mamma M and an absorption coefficient of an X-ray calculated beforehand according to the energy distribution and substances composing the mamma M. A calculation part 39 calculates a new thickness R of the mamma M and a new mammary gland content based on the low voltage image GL, a high voltage image GH, a tube voltage in imaging, the absorption coefficient of the fat, and the absorption coefficient of the mammary gland.SELECTED DRAWING: Figure 3【課題】乳腺量取得装置、方法およびプログラムにおいて、乳房の乳腺量を精度よく算出する。【解決手段】乳腺量算出部３２の被写体情報取得部３７が、低圧画像ＧＬに基づいて、乳房Ｍの厚さおよび乳腺量を取得する。吸収係数取得部３８が、エネルギー分布および乳房Ｍを構成する物質に応じて予め算出された、乳房Ｍの厚さとＸ線の吸収係数との関係を参照して脂肪の吸収係数および乳腺の吸収係数を取得する。算出部３９が、低圧画像ＧＬ、高圧画像ＧＨ、撮影時の管電圧、脂肪の吸収係数および乳腺の吸収係数に基づいて、新たな乳房Ｍの厚さＲおよび新たな乳腺量を算出する。【選択図】図３
