An imaging method for microcalcification displays microcalcification distribution by acquiring and overlapping a photoacoustic image of microcalcification and an ultrasonic image of tissue. The image acquired by the present invention, in comparison to images acquired by ultrasonic and X-ray mammography, has advantages, such as no speckle noises, higher optical contrast, higher ultrasonic resolution, and so on. The present invention also has advantage in safety by adopting a light source having no ionizing radiation. In addition, an imaging method for microcalcification is also herein provided. An imaging system for microcalcification is also herein disclosed.一種鈣化點成像方法,其藉由取得鈣化點光聲影像及組織超音波影像並將其重疊,藉以成像鈣化點於組織的分佈情形。本發明之影像相較於超音波及X光乳房攝影,具有無斑點雜訊、高光學吸收對比、高超音波空間解析度的優點,而且其使用的光源為非游離輻射,因此具有更高的安全性。本發明亦揭示一種鈣化點成像系統。S11~S16...鈣化點成像步驟