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- W2187376502 abstract "BACKGROUND AND PURPOSE: Ocular masses represent a spectrum of malignant tumors and benign lesions that are sometimes difficult to detect and differentiate by conventional imaging techniques. The aim of this study was to characterize a group of malignant ocular masses with DWI, with the goals of establishing reference data and identifying potential clinical applications for improved noninvasive characterization. MATERIALS AND METHODS: With institutional review board approval, 26 malignant ocular masses in 22 patients were retrospectively analyzed. Five masses were excluded from further analysis due to nonvisualization. Fifteen retinoblastomas, 5 melanomas, and 1 highly undifferentiated carcinoma were studied. Region-of-interest analysis was performed, and the ADC of each mass was measured and also compared with a normal-appearing thalamus. Lesion thickness was measured, the amount of susceptibility artifact was qualitatively assessed and graded, and the correlation between these factors and retinoblastoma ADC was determined. RESULTS: Retinoblastomas had an ADC of 0.93 0.3 10 3 mm 2 /s (mean). Melanoma had an ADC of 1.18 0.16 10 3 mm 2 /s. The ADC of retinoblastoma was strongly inversely correlated with lesion thickness, likely representing the effect of partial volume averaging. ADC was not correlated with the amount of subjectively determined susceptibility artifact. CONCLUSIONS: Malignant ocular tumors were consistently characterized with DWI, though with limitations due to artifact and partial volume averaging. Additional description of DWI of ocular masses and further technical improvements may lead to a clinical role for DWI. ABBREVIATIONS: PROPELLER periodically rotated overlapping parallel lines with enhanced reconstruction" @default.
- W2187376502 created "2016-06-24" @default.
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- W2187376502 date "2012-01-01" @default.
- W2187376502 modified "2023-09-27" @default.
- W2187376502 title "ORIGINAL RESEARCH Diffusion-Weighted Imaging of Malignant Ocular Masses: Initial Results and Directions for Further Study" @default.
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