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To evaluate the diagnostic value of dynamic contrast-enhanced MRI (DCE-MRI) in salivary gland tumors, thirty-five patients (47 lesions) who underwent MR examinations and were histopathologically diagnosed with salivary gland tumors in Okayama University Hospital, between April 1998 and March 2005, were entered in the present study. The parameters included CI_max300 or CI_max600, which was the contrast index (CI) at maximal contrast enhancement upon 300s or 600s, and T_max, which was the time that corresponded to the CI_max300. Washout ratio (WR₃₀₀ or WR₆₀₀) was defined as follows: CI_max300−CI_300s/CI_max300 or CI_max600−CI_600s/CI_max600×100 (%), where CI₃₀₀ or CI₆₀₀ was the CI at 300s or 600s after contrast medium administration. We obtained the following results from the analysis of DCE-MRI parameters; (a) The salivary gland tumors were categorized into three CI curve types …