title: A study of high frequency ultrasound scattering from non-nucleated biological specimens.
abstract: The high frequency backscatter from cells with a nucleus to cell volume ratio of 0.50 cannot be adequately modeled as a homogeneous sphere. It was hypothesized that the cytoplasm of such cells is of fluid nature. This work attempts to model the ultrasound backscatter (10-62 MHz) from some non-nucleated biological specimens. This was done by measuring the backscatter response from individual sea urchin oocytes and comparing it to theoretical predictions in both the time and frequency domains. A good agreement was found between the experimental and theoretical results suggesting that the non-nucleated oocytes are of fluid nature.
authors.forename: Omar
authors.initials: O
authors.lastname: Falou
authors.forename: Ralph E
authors.initials: RE
authors.lastname: Baddour
authors.forename: George
authors.initials: G
authors.lastname: Nathanael
authors.forename: Gregory J
authors.initials: GJ
authors.lastname: Czarnota
authors.forename: J Carl
authors.initials: JC
authors.lastname: Kumaradas
authors.forename: Michael C
authors.initials: MC
authors.lastname: Kolios
mesh_terms: D000818:Animals; D001826:Body Fluids / Q000502:physiology; D002468:Cell Physiological Phenomena; D003593:Cytoplasm / Q000502:physiology*; D005260:Female; D009865:Oocytes / Q000502:physiology*; D012542:Scattering, Radiation; D012617:Sea Urchins; D014465:Ultrasonics