title: Effect of contact force on breast tissue optical property measurements using a broadband diffuse optical spectroscopy handheld probe.
abstract: We investigated the effects of operator-applied force on diffuse optical spectroscopy (DOS) by integrating a force transducer into the handheld probe. Over the typical range of contact forces measured in the breasts of eight patients, absorption and reduced scattering coefficients (650 to 1000 nm) variance was 3.1 +/- 1.0% and 1.0 +/- 0.4%. For trained operators, we observed <5% variation in hemoglobin and <2% variation in water and lipids. Contact force is not a significant source of variation, most likely because of a relatively wide probe surface area and the stability of the DOS method for calculating tissue optical properties.
authors.affiliation: Laser Medical and Microbeam Program, Beckman Laser Institute, University of California, Irvine, 1110 Health Sciences Road, East, Irvine, California 92612, USA. acerussi@uci.edu
authors.forename: Albert
authors.initials: A
authors.lastname: Cerussi
authors.forename: Sarah
authors.initials: S
authors.lastname: Siavoshi
authors.forename: Amanda
authors.initials: A
authors.lastname: Durkin
authors.forename: Cynthia
authors.initials: C
authors.lastname: Chen
authors.forename: Wendy
authors.initials: W
authors.lastname: Tanamai
authors.forename: David
authors.initials: D
authors.lastname: Hsiang
authors.forename: Bruce J
authors.initials: BJ
authors.lastname: Tromberg
mesh_terms: D001940:Breast / Q000033:anatomy & histology* / Q000502:physiology*; D003198:Computer Simulation; D006801:Humans; D008954:Models, Biological; D009391:Nephelometry and Turbidimetry / Q000295:instrumentation* / Q000379:methods; D010812:Physical Stimulation / Q000379:methods; D012542:Scattering, Radiation; D013314:Stress, Mechanical; D014159:Transducers