ul·tra·so·nog·ra·phy /-səˈnɑgrəfi, so-/
  ul·tra·so·nog·ra·phy /-fɪ/ 名詞
  ultrasonography
       n : using the reflections of high-frequency sound waves to
           construct an image of a body organ (a sonogram); commonly
           used to observe fetal growth or study bodily organs [syn:
            sonography, ultrasound]