A medical image processing apparatus and breast image processing method thereof are provided. The processing method at least contains but not limited to the following steps. At least on slice of breast image is obtained. Mammary glandular tissue in each breast image is detected through a mammary glandular tissue detector. The mammary glandular tissue detector is based on texture characteristic analysis. Therefore, the embodiments of the present disclosure would assist density analysis of the mammary glandular tissue and efficiently reduce false positive of computer aided detection. In addition, based on a result of the density analysis of the mammary glandular tissue, the embodiment would further determine lactation yield and present density diagrams of mammary glandular tissue of left and right breasts. Also, breast region in the breast image would be distinguished based on rib information.本發明提出一種醫療影像處理裝置及其乳房影像處理方法。此處理方法至少包括(但不僅限於)下列步驟。取得至少一片段的乳房影像。透過乳腺組織偵測器偵測各片段乳房影像中的乳腺組織。而此乳腺組織偵測器是基於紋理特徵分析。據此,可輔助乳腺組織密度分析且有效降低電腦輔助偵測系統之偽陽性。此外,基於乳腺組織密度分析的結果,本發明實施例更可進一步判斷泌乳量及呈現左右乳房之乳腺組織密度圖。本發明實施例亦可基於肋骨資訊來區分出乳房影像中的乳房區域。S210~S230‧‧‧步驟