In vivo estimation of perfluorooctylbromide concentration in tissues

Robert F. Mattrey, Albert A. Nemcek, Richard Shelton, Michael P. André, Roxane M. Mitten, Thomas Peterson

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Currently, the only available method to measure perfluorooctylbromide (PFOB) in tissues requires its extraction with a solvent followed by gas chromatography. Not only is this method invasive, but it cannot be validated because the amount of unextracted PFOB is unknown. Using a cylindrical CT phantom with eight wells in the wall filled with bromine (Br) standards, an in vivo method to measure PFOB tissue concentration was developed. Neutron activation analysis (NAA) was used to calibrate and validate the phantom since NAA allows the quantification of Br by making Br radioactive without the need for extraction. Once NAA was validated for PFOB, the phantom was calibrated using 80 rats and tested using 20 rats relative NAA. The phantom produced linear correlation between CT number and known PFOB concentrations with r = 0.998. After its calibration with NAA, the CT method produced a linear correlation between tissue PFOB concentration determined by CT and NAA near the line of identity with an r = 0.984, thus allowing the determination of PFOB tissue content in vivo noninvasively.

Original languageEnglish (US)
Pages (from-to)915-921
Number of pages7
JournalInvestigative Radiology
Volume25
Issue number8
DOIs
StatePublished - Aug 1990

Keywords

  • Biodistribution
  • Computed tomography
  • Pfob
  • Phantom

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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