Measurements of the nonlinearity parameter B/A of contrast agents.
The nonlinearity parameter B/As of two contrast agents (Albunex and Levovist) in a saline solution (Isoton II) were measured. The results show that B/As of both contrast agents were increasing functions of bubble number densities. In general, they are much higher than that of most soft tissues. For Albunex (concentration = 1 microL Albunex: 1 mL Isoton) a B/A of 2000; and for Levovist (concentration = 6.0 mg Levovist powder: 1 mL Isoton), a B/A of 600 was obtained.
Wu
J
J
Department of Physics, University of Vermont, Burlington 05405, USA.
Tong
J
J
D000418:Albumins / Q000737:chemistry*; D003287:Contrast Media / Q000737:chemistry*; D008433:Mathematics; D008863:Microspheres; D011134:Polysaccharides / Q000737:chemistry*; D014465:Ultrasonics
D000418:Albumins; C060687:Albunex; D003287:Contrast Media; D011134:Polysaccharides; C059891:SHU 508