Submitted on: 24 March 2002.
Revised on: 15 April 2002.
Accepted on: 11 May 2002.
JOURNAL OF ULTRASOUND IN MEDICINE
http://reply.papertrans.cn/3/201/20016/20016-32.png
http://reply.papertrans.cn/3/201/20016/20016-33.png
http://reply.papertrans.cn/3/201/20016/20016-34.png
http://reply.papertrans.cn/3/201/20016/20016-35.png
Submitted on: 03 April 2009.
Revised on: 08 May 2009.
Accepted on: 29 May 2009.
JOURNAL OF ULTRASOUND IN MEDICINE