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PURPOSE To evaluate thin-section computed tomography (CT) performed during the corticomedullary and nephrographic phases of contrast material enhancement in the characterization of renal masses. MATERIALS AND METHODS A prospective study of 30 patients was undertaken with CT to characterize 31 "indeterminate" renal masses. In all patients, 5-mm-thick,(More)
PURPOSE To compare the diagnostic accuracy of focused helical computed tomography (CT) with orally administered contrast material with that of nonfocused helical CT with orally and intravenously administered contrast material. MATERIALS AND METHODS After receiving oral contrast material, 228 patients with clinically suspected appendicitis underwent(More)
OBJECTIVE We describe the findings of contrast-enhanced gated cardiac CT in 15 patients with 23 incidentally noted cardiac ventricular diverticula. CONCLUSION Cardiac diverticula most commonly occur in the left ventricle but have been reported to occur in all chambers of the heart. Despite reports of their rare occurrence, cardiac ventricular diverticula(More)
PURPOSE To evaluate the belief that the frequencies of contrast material extravasation and minor, nonidiosyncratic contrast material reactions correlate with intravenous injection rates. MATERIALS AND METHODS Complications of 6,660 consecutive injections of contrast material for computed tomography were prospectively recorded. Ionic (n = 4,851) or(More)
OBJECTIVE The purpose of the study was to develop quantitative and qualitative criteria for diagnosing fatty liver on contrast-enhanced helical CT. SUBJECTS AND METHODS Differential liver-spleen attenuation was evaluated between 80 and 120 sec after injection in 76 patients who underwent contrast-enhanced helical CT. Unenhanced CT images had earlier(More)
OBJECTIVE The purpose of our study was to reassess the CT finding of pneumatosis in intestinal ischemia to determine whether it indicates transmural necrosis versus partial mural ischemia and also to determine whether other CT findings can be used to predict which patients with pneumatosis are likely to have viable bowel. CONCLUSION The CT finding of(More)
PURPOSE To determine the sensitivity and specificity of computed tomographic (CT) criteria for differentiating benign from malignant stomach lesions in patients with a thickened gastric wall at CT. MATERIALS AND METHODS A radiology department file search revealed 36 patients with a thickened gastric wall at CT who underwent double-contrast barium(More)
PURPOSE To determine the effects of cyst diameter and location (intrarenal, exophytic), renal attenuation, section collimation, and computed tomographic (CT) interscanner variability on renal cyst pseudoenhancement in a phantom model. MATERIALS AND METHODS A customized anthropomorphic phantom was designed to accept 40-, 140-, and 240-HU renal inserts(More)