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Abstract #1864

Repeatability of apparent diffusion coefficient and intravoxel incoherent motion parameters at 3.0 Tesla in orbital masses.

Augustin Lecler1, Julien Savatovsky1, and Laure Fournier2

1Radiology, Fondation Ophtalmologique Adolphe de Rothschild, Paris, France, 2Radiology, Hôpital Européen Georges Pompidou, Paris, France

- IVIM technique is feasible in the orbit with a good to acceptable repeatability of ADC and D. (coefficient of variation range 12%-25%) - Interobserver repeatability agreement is excellent for all the IVIM parameters in the orbit. (intraclass correlation coefficient range 90-95%) - The use of PF or D* as biomarkers should be cautious because of high test-retest and interobserver variabilities.

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