Abstract
References
1.
1.
Kremkau FW
. Imaging instruments , in Kremkau FW. Diagnostic Ultrasound: Principles and Instruments , Fourth Edition . Philadelphia : WB Saunders , 1993 ;129 -189 .
2.
2.
Kremkau FW
. Contrast resolution . JDMS
1991 ;7 :292 -295 .