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

Figure 3 A 38-year-old male patient with a pleomorphic adenoma in the right submandibular gland. A: On sagittal plane T2-weighted image, a hyperintense (compared to the gland), smooth, slightly lobule-contoured mass is observed; B: On contrast-enhanced axial plane T1-weighted image, intense contrast-enhancement is observed in the mass; C: The mass is hyperintense on the apparent diffusion coefficient map due to facilitated diffusion (ADC value: 1.7 × 10^-3 mm²/s); D: The mass is hypoperfused on color coded perfusion image; E: The tumor has type A time intensity curve; F, G, and H: K_trans, K_ep, and V_e values on quantitative perfusion images were 0.211 min^-1, 0.383 min^-1, and 0.593, respectively. ADC: Apparent diffusion coefficient.