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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