Sonography is as specific but not as sensitive as MRI for evaluating epicondylitis. Used as an initial imaging tool, sonography might be adequate for diagnosing this condition in many patients, thus allowing MRI to be reserved for patients with symptoms whose sonographic findings are normal.

Jill E.Jacobs1 BernardA. Birnbaum1 MichaelA. Shapiro1'2 CurtisR Langlotz1 FrancoisSlosman1'3 StephenE.Rubesin1 StevenC.Horii1OBJECTIVE. The purposeof thestudywasto developquantitativeandqualitativecriteria for diagnosing fatty liver on contrast-enhancedhelical CT.SUBJECTS AND METHODS. Differential liverâ€"spleen attenuationwas evaluatedbe tween 80 and I 20 sec after injection in 76 patients who underwent contrast-enhancedhelical CT. UnenhancedCT images had earlier establishedfatty liver when the liver minus spleen at tenuation difference was less than or equal to â€"¿ 10 H (n = 18). Four observers who had not seen the unenhanced images used contrast-enhanced CT images to assess the presence of fatty liver on a five-point Likert scale, the presenceof geographic areassparedfrom fatty infi tration, and the relative liverâ€"spleen attenuation. The diagnostic accuraciesof various imaging criteria were compared using McNemar's chi-square test (for sensitivity and specificity) and analysis of receiver operating characteristic curves.RESULTS. Sensitivity,specificity, andreceiveroperatingcharacteristic curveareasfor ob servers' qualitative judgments were 54%, 95%, and .91, respectively; for quantitative differ ential liverâ€"spleen attenuation (80â€"100sec; â€"¿ 20.5 H discriminatory value), the values were

OBJECTIVE.Normal

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