Investigative radiology
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Investigative radiology · Nov 1990
Magnetic resonance imaging of peripheral nerve sheath tumors. Assessment by numerical visual fuzzy cluster analysis.
A retrospective, nonblinded review of ten nerve sheath tumors (four malignant) selected for pathologic proof and complete magnetic resonance (MR) evaluation was performed to assess the primary tumor location, signal pattern, and extent of reactive zone. A modification of visual fuzzy cluster analysis (VFCA) that emphasized the number of visual fuzzy clusters in each mass was developed to assess the neural tumors. The MR findings were correlated with the findings at surgery and histopathology. ⋯ Three types of reaction (edema) were observed best on long repetition time/echo time (TR/TE) sequences, confined to immediate peritumoral region, intracompartmental, and extracompartmental. The first two patterns correlated well with clinicopathologic findings; however, the third pattern did not. Separation of indolent (benign) cellular masses from aggressive (malignant) ones by MR characteristics is difficult but VFCA shows promise for aiding this differentiation and deserves further investigation in larger study populations.
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Investigative radiology · Nov 1990
A joint course in emergency radiology for residents in radiology and in emergency medicine.
A basic course in emergency radiology has been developed and taught jointly to first- and second-year radiology residents and emergency medicine residents at the Medical College of Georgia. The course, comprising thirty-five lectures, was presented in a 5-month block. ⋯ There was a wider gap in scores between the two groups on the practical than on the written examination. All participants considered the course useful and the material presented to be immediately applicable.