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Cluster visualization of reference co-citation network with modularity Q 0.85 and mean silhouette 0.96 in the IVIM field from 1988 to 2021. The network was divided into 37 clusters. Clusters represented frequency keywords of publications. The smaller the sequence number of cluster, the higher the frequency. IVIM – intravoxel incoherent motion. Figure was created using CiteSpace V (version 5.8.R1), Podia.
