Jennifer J. Gibson

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Near-infrared spectroscopic tomography was used to measure the properties of 24 mammographically normal breasts to quantify whole-breast absorption and scattering spectra and to evaluate which tissue composition characteristics can be determined from these spectra. The absorption spectrum of breast tissue allows quantification of (i) total hemoglobin(More)
BACKGROUND Exposure to smoking in movies has been linked with adolescent smoking initiation in cross-sectional studies. We undertook a prospective study to ascertain whether exposure to smoking in movies predicts smoking initiation. METHOD We assessed exposure to smoking shown in movies in 3547 adolescents, aged 10-14 years, who reported in a baseline(More)
OBJECTIVE Regional studies have linked exposure to movie smoking with adolescent smoking. We examined this association in a representative US sample. DESIGN/METHODS We conducted a random-digit-dial survey of 6522 US adolescents aged 10 to 14 years. Using previously validated methods, we estimated exposure to movie smoking, in 532 recent box-office hits,(More)
RATIONALE AND OBJECTIVES Near-infrared (NIR) imaging has its niche in quantifying and characterizing functional changes in tissue relating to vascularity and metabolic status. Here, NIR tomography was applied to study mammographically normal breast tissue in vivo by evaluating relationships between functional parameters so obtained to clinical representers(More)
OBJECTIVE To examine preschoolers' attitudes, expectations, and perceptions of tobacco and alcohol use. DESIGN Structured observational study. Children used props and dolls to act out a social evening for adults. As part of the role play, each child selected items from a miniature grocery store stocked with 73 different products, including beer, wine, and(More)
Three-dimensional (3-D) models of light propagation in diffuse optical tomography provide an accurate representation of scattering in tissue. Here the use of spectral priors, shown to improve quantification of functional parameters in 2-D, has been extended to 3-D. To make 3-D spectral imaging computationally tractable, a novel technique is presented to(More)
BACKGROUND Children's hospitals should advocate for children's health by modeling optimum health environments. OBJECTIVES To determine whether children's hospitals provide optimum health environments and to identify associated factors. DESIGN Telephone survey. SETTING Canadian and US hospitals with accredited pediatric residency programs. (More)