1. Systems biology

   • Terumi Hayashi

   EDITORIAL Pages: 51 - 52

2. Determination of peripheral color signal density using contrast-enhanced color Doppler ultrasonography in diffuse liver disease

   • Masao Shinohara

   ORIGINAL ARTICLE Pages: 53 - 58

3. Optimal number of image slices for reliable measurement of left ventricular volumes and ejection fraction by three-dimensional transesophageal echocardiography

   • Etsuko Magosaki
   • Dietrich Markus SchÄfer
   • Annette Geibel

   ORIGINAL ARTICLE Pages: 59 - 65

4. Enhancement of stents using interference of low-frequency ultrasonic echo signals

   • Gosuke Ohashi
   • Akihisa Ohya
   • Iwaki Akiyama

   ORIGINAL ARTICLE Pages: 67 - 73

5. Ultrasonography and computed tomography of extracapsular invasion in cervical lymph nodes of squamous cell carcinoma in the oral cavity

   • Junichi Ishii
   • Hirokazu Nagasawa
   • Tohru Kurabayashi

   ORIGINAL ARTICLE Pages: 75 - 79

6. Evaluating the regional elastic modulus of a cylindrical shell with nonuniform wall thickness

   • Hideyuki Hasegawa
   • Hiroshi Kanai
   • Yoshiro Koiwa

   ORIGINAL ARTICLE Pages: 81 - 90

7. Clinical application of a new method that segments the region of interest into multiple layers for RF amplitude histogram analysis in the cirrhotic liver

   • Yasutomo Fujii
   • Nobuyuki Taniguchi
   • Tomotsugu Takayama

   ORIGINAL ARTICLE Pages: 91 - 98