Corresponding Author

Paper:	idn427
Name:	Y. Udagawa
Company:	Imaging Supersonic Laboratories Co., Ltd.
Address:	12-7 Tezukayama-nakamachi Nara-shi Nara, PC 631
Country:	Japan
Phone:	+81 742 40 2345
Fax:	+81 742 40 2346
Email:	isl@kcn.ne.jp