7[6]Bouin H,Dabdie D,Romberg P,etal.The value of ultrasound in the diagnosis of appendicitis in children with acute abdominal pain.A report of 337cases[J].Rev～Imag～Med,1994,6(9):527～533
8Brkljacic B,Cuk V,Tomic-Brzac H,et al.Ultrasonic eval-uation of benign and malignant nodules in echographical-ly multinodular thyroids.J Clin Ultrasound,1994,22:71-76.
9Hatabu H,Kasagi K,Yamamoto K,et al.Cystic papillary carcinoma of the thyroid gland:A new sonographic sign.Clin Radiol,1991,43(2):121.
