大家都知道,及时的識別癌症对于癌症的治療具有多么大的意义。可惜的是,在內部器官的癌肿,即或是精密的X射綫透視檢查也常常不可能發現,因为癌腫細胞的化学成分与健康細胞上的化学成分非常接近,它們对射綫的吸收是相同的。然而,癌腫的密度通常截然不同于其周圍組織的密度,这就使利用超声波振动來發現癌肿有了可能。向生物体的組織發射出超声波的瞬时脉冲,它們在密度不同的組織的分界处發生反射而 As we all know, timely identification of cancer is of great significance for the treatment of cancer. Unfortunately, cancer in internal organs, or even delicate X-ray fluoroscopy, is often impossible to detect because the chemical composition of cancer cells is very similar to that of healthy cells and their absorption of radiation is identical. However, the density of a cancer is usually quite different from the density of its surrounding tissue, making it possible to detect the cancer using ultrasonic vibrations. An instantaneous pulse of ultrasound is emitted to the tissue of the organism and reflected at the boundaries of tissues of different densities