title: Ultrasonic backscatter from contrast producing collagen microspheres.
mesh_terms: D000162:Acoustics; D000818:Animals; D003094:Collagen / Q000008:administration & dosage; D003287:Contrast Media; D004285:Dogs; D004912:Erythrocytes / Q000166:cytology; D006400:Hematocrit; D066298:In Vitro Techniques; D008099:Liver / Q000033:anatomy & histology; D008863:Microspheres; D055095:Optics and Photonics; D014463:Ultrasonography
chemical_list: D003287:Contrast Media; D003094:Collagen