Diagnostic efficacy of diffusion-weighted imaging and semiquantitative and quantitative dynamic contrast-enhanced magnetic resonance imaging in salivary gland tumors

Figure 2 A 72-year-old male patient with a Warthin’s tumor in the right parotid gland. A: On axial plane T2-weighted image, a mildly hypointense (compared to the gland), smooth-contoured mass localized in the center of the parotid gland is observed; B: On the diffusion-weighted image, the mass appears to be hyperintense; C: ADC value was 0.8 × 10^-3 mm²/s on the apparent diffusion coefficient map; D: The mass is hyperperfused on color-coded perfusion image; E: Type B time intensity curve shows a washout ratio of 75%; F, G, and H: K_trans, K_ep, and V_e values on quantitative perfusion images were 0.617 min^-1, 6.438 min^-1, and 0.073, respectively. ADC: Apparent diffusion coefficient.