Intravoxel incoherent motion imaging allows the quantification of diffusion and pseudo-perfusion in tissues and can be used as an alternative to conventional T1-weighted scans that require the use of contrast agents. Its benefits for diagnosing juvenile idiopathic arthritis(JIA) in the knee has previously be demonstrated, but usually requires multi-b-value DWI scans with long scan times. In this work we investigate the influence of different b-value combinations on the calculated diffusion and perfusion fraction values and explore the possibility for IVIM MRI of JIA with fewer b-values and shorter scan times.
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