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J W Hill

Publications and source records attributed to J W Hill.

At least 19 recordsLinked to original sources
PubMed1989

"Single-exposure" dual energy digital radiography in the detection of pulmonary nodules and calcifications.

We studied the detectability of mineralized and non-mineralized simulated pulmonary nodules with dual energy digital radiography. "Soft tissue" and "bone" images (pixel size = 0.2 mm, 10 bits deep) were obtained with subtraction image processing after a single simultaneous exposure (100 kVp, 8 mAs, 17 mR skin exposure dose) of two storage phosphors with an interleaved 0.9 mm copper wafer. Three classes of paraffin-based nodules (0.5 to 3.0 cm) of varying mineral concentration (0, 120 and 190 mg/cm3 K2HPO4) were randomly positioned on the chest wall of two healthy volunteers to simulate calcified and non-calcified nodules. The average receiver operating characteristics (ROC) area of six readers (n = 2880 observations) showed that digital "bone" images (ROC area: 0.77 +/- 0.03) were significantly better (P less than 0.04) than conventional radiographs (OC Film, Lanex medium screens, 141 kVp, 19 mR skin exposure dose) (ROC area: 0.71 +/- 0.05) in detecting calcification in nodules. The unsubtracted digital images of lower kilovoltage were not superior to the 141 kVp conventional radiographs in a subgroup of two readers (ROC area: 0.73 +/- 0.02). Digital "soft tissue" images were equivalent to conventional chest radiographs in detecting soft tissue pulmonary nodules (ROC areas: 0.92 +/- 0.04 and 0.92 +/- 0.05, respectively.

Adult↗
PubMed1988

Achalasia.

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Esophageal Achalasia↗
PubMed1987

Benefit-cost analysis of supported competitive employment for persons with mental retardation.

A review of the literature on unemployment rates among adults with mental retardation is presented and the societal impact of the number of adults with mental retardation who remain unemployed is discussed. The supported competitive employment model is presented as illustrative of a habilitation program allowing greater monetary returns to society than traditional adult service programs. A benefit-cost analysis of our supported competitive employment program, occurring during the period from 1978 to 1986, is presented from two perspectives: that of the consumer (i.e., the adult with severe disabilities) and that of the taxpayer. Results of the benefit-cost analysis indicate that supported competitive employment is a financially prosperous venture from both perspectives. That is, from the consumers' perspective, for every $1.00 relinquished in taxes, supplemental security income (SSI), and forgone workshop earnings, $1.97 was received in increased income; the net benefit per year was $3,894 consumer. From the taxpayers' perspective, for every $1.00 expended for the funding of supported competitive employment programs and in lost tax revenues realized by the provision of targeted jobs tax credits, $1.87 was accumulated in benefits; the net yearly benefit to the taxpayer was $4,063 per consumer. The authors conclude that supported competitive employment is a financially profitable venture for both consumers and taxpayers.

Adult↗
PubMed1987

Exercise prescription.

Exercise seems to be an effective, safe and cost effective treatment modality for mildly depressed and anxious patients. The exercise should be aerobic in nature. Individuality of prescription and frequent follow-up with attainable, reasonable goals are important. Physician interest should be high, and the patient should feel ownership of the program. Progression should be slow to lessen drop-out frequency.

Anxiety Disorders↗
PubMed1978

Pharmacists' knowledge and attitudes regarding monitoring the behaviors of children with learning disabilities.

The attitudes and knowledge of pharmacists in Nebraska regarding children's learning disabilities were surveyed by questionnaire. One hundred thirty-three pharmacists responded. The results were analyzed according to type of practice (community, chain and hospital) and age (20--30 years, 31--40 years, 41--50 years, and 51 years and over). The results indicate that pharmacists are being asked about learning disabilities. Overall, 53% of the pharmacists responding had been asked about learning disabilities by parents, physicians, teachers or others. No significant interactions were found between the type of practice and age, and no significant main effect for type of practice was found in the ANOVA results for knowledge scores or attitude scores. Even though there were no differences owing to age in pharmacists' knowledge of learning disabilities, age was found to have a significant effect on attitudes toward increased pharmacist involvement in monitoring behaviors of learning-disabled children; the younger groups had a more positive attitude. The pharmacist seems to have the knowledge and attitudes required to become more actively involved in monitoring the medications and behaviors of children with learning disabilities.

Adult↗
PubMed1975

The bitter pill.

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Dentistry↗