A diffusion theory model of spatially resolved, steady‐state diffuse reflectance for the noninvasive determination of tissue optical properties in vivo

TJ Farrell, MS Patterson, B Wilson - Medical physics, 1992 - Wiley Online Library
A model based upon steady‐state diffusion theory which describes the radial dependence
of diffuse reflectance of light from tissues is developed. This model incorporates a photon …

The use of a neural network to determine tissue optical properties from spatially resolved diffuse reflectance measurements

TJ Farrell, BC Wilson… - Physics in medicine & …, 1992 - iopscience.iop.org
The authors report a novel application of a neural network to perform curve fitting to
simulated experimental data, obviating the need for lengthy non-linear least-squares fitting …

Anisotropy of light propagation in human skin

…, M Hermann, M Essenpreis, TJ Farrell… - Physics in Medicine …, 2000 - iopscience.iop.org
Using spatially resolved, steady state diffuse reflectometry, a directional dependence was
found in the propagation of visible and near infrared light through human skin in vivo. The …

Bladder function after fetal surgery for myelomeningocele

…, JC Thomas, EA Thom, LJ Howell, JA Farrell… - …, 2015 - publications.aap.org
… regard to scientific content and form; Ms Farrell participated in conception of the study design
… Ms Farrell provided significant intellectual contribution to the drafting and revision of this …

Influence of layered tissue architecture on estimates of tissue optical properties obtained from spatially resolved diffuse reflectometry

TJ Farrell, MS Patterson, M Essenpreis - Applied optics, 1998 - opg.optica.org
Most instruments used to measure tissue optical properties noninvasively employ data-analysis
algorithms that rely on the simplifying assumption that the tissue is semi-infinite and …

IQ and standard English

TJ Farrell - College Composition and Communication, 1983 - JSTOR
The purpose of this paper is to present a hypothesis. The hypothesis presented is based on
circumstantial evidence and inferential reasoning, as all hypotheses are, and it is testable, …

Comparison of the in vivo photodynamic threshold dose for photofrin, mono‐and tetrasulfonated aluminum phthalocyanine using a rat liver model

TJ Farrell, BC Wilson, MS Patterson… - Photochemistry and …, 1998 - Wiley Online Library
The photodynamic threshold dose in normal rat liver was determined from the measured
depth of necrosis following surface irradiation. The threshold was determined for the …

Accuracy of the diffusion approximation in determining the optical properties of a two-layer turbid medium

G Alexandrakis, TJ Farrell, MS Patterson - Applied optics, 1998 - opg.optica.org
We have examined the possibility of determining the optical properties of a two-layer
medium by using a diffusion approximation radiation transport model [Appl. Opt.37, 779 (1998)]. …

A dynamic model for ALA-PDT of skin: simulation of temporal and spatial distributions of ground-state oxygen, photosensitizer and singlet oxygen

B Liu, TJ Farrell, MS Patterson - Physics in Medicine & Biology, 2010 - iopscience.iop.org
Singlet oxygen direct dosimetry and photosensitizer fluorescence photobleaching are being
investigated and applied as dosimetric tools during 5-aminolevulinic acid (ALA)-induced …

Quantification of fluorophore concentration in tissue-simulating media by fluorescence measurements with a single optical fiber

KR Diamond, MS Patterson, TJ Farrell - Applied optics, 2003 - opg.optica.org
Quantifying fluorescent compounds in turbid media such as tissue is made difficult by the
effects of multiple scattering and absorption of the excitation and emission light. The approach …