Radiology
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Through a survey of interventional radiologists, to document patterns of conscious sedation, nursing assistance, and care before and after the intervention and to compare demographics and different interventional radiology practices. ⋯ The data supply useful background information regarding the use of anesthesia, periprocedural monitoring, clinical assessment, and nursing care.
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Sinonasal undifferentiated carcinoma: CT and MR imaging of an uncommon neoplasm of the nasal cavity.
To determine the computed tomographic (CT) and magnetic resonance (MR) imaging appearance of sinonasal undifferentiated carcinoma. ⋯ Sinonasal undifferentiated carcinoma cannot be distinguished from other tumors of this region (with the possible exception of melanoma) on the basis of imaging features.
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To assess the relative accuracies of computed tomography (CT) and magnetic resonance (MR) imaging in the local staging of primary malignant bone and soft-tissue tumors. ⋯ CT and MR imaging are equally accurate in the local staging of malignant bone and soft-tissue neoplasms in the specific anatomic sites studied.
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To measure the radiologic characteristics of subtle lung nodules and develop nodule phantoms that simulate these characteristics. ⋯ The radiologic pattern of subtle lung nodules is poorly simulated by nodule phantoms with simple spherical or disk shapes. The nodule phantoms in this study produce realistic radiographic patterns with an energy-dependent attenuation equivalent to that of tissue. The nodule phantoms are intended for use in experiments involving human subjects.
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To evaluate a focused, helical computed tomographic (CT) technique for imaging the appendix in patients suspected of having appendicitis. ⋯ Appendix CT examination can help diagnose or exclude appendicitis and establish an alternative diagnosis.