Biomedical subjects
J T Rhea
Publications and source records attributed to J T Rhea.
The effects of chemotherapy on bony metastases as measured by quantitative skeletal imaging.
The effect of chemotherapy on bony metastases from adenocarcinoma of the colon was investigated by quantitative skeletal imaging over a two-month interval. The quantitative skeletal imaging results correlated with conventional blood chemistry results over this time period. While chemical assay techniques furnish an average value of lesion response, the quantitative bone scan represents a method for individual lesion analysis. This methodology has the potential to provide a better understanding of metastatic bone disease therapy.
Giant-cell granuloma of the sinuses.
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Thorium dioxide.
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Radiographic anatomy of the tarsal bones.
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Benign intracranial calcification.
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Bronchial obstruction.
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Emphysematous cholecystitis.
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Pathologic intracranial calcifications.
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Foreign bodies in the hypopharynx and esophagus.
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Yield of screening urography in young women with urinary tract infection.
In order to determine the diagnostic yield and therapeutic outcome of screening urography in young women with urinary tract infection, 1000 urographic examinations were reviewed. Of these 96.4% were normal; 1.4% revealed abnormalities that subsequently required therapy. Each treated abnormality was expensive to diagnose; protocols other than universal urography could have made most of these diagnoses. The incidence of treated abnormalities may be no greater in this group than in the general population. Universal screening urography in these patients cannot be definitely recommended.
Changing ureteral appearance during pyelosinus extravasation.
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Evaluation of a sequence of diagnostic tests using the workup of ureteral stone as a model.
Additional tests are not always beneficial and can increase costs significantly while increasing the group of patients with an equivocal diagnosis. In general, diagnostic testing should cease for a group of patients when the tests that have been performed result in a sufficiently high level of diagnostic certainty and also result in the largest group of true positive or true negative diagnoses. Evaluation of diagnostic tests must include consideration of the results of sequences of tests, equivocal results of tests, and the effect of added costs on both advantageous sequences of tests and total expenditures. Evaluation of the diagnostic tests performed for ureteral stone in the emergency ward demonstrates that a significant group of patients, on whom an intravenous urogram could be avoided can be selected. As an alternative to the IVU in this selected group, hydration and diuresis could be considered. The IVU could be reserved for those patients who did not experience classic relief of pain and passage of stone.