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

Figure 4 A 76-year-old female patient with diffuse large B cell lymphoma and a mass in the left submandibular gland region. A: On axial T2-weighted image, a smooth-contoured mass with homogeneous internal structure and an intensity similar to that of the submandibular gland is observed; B: Axial contrast-enhanced image shows the intense homogeneous contrast enhancement of the mass; C: On the apparent coefficient mapping image, the mass features prominent diffusion restriction (ADC value: 0.6 × 10^-3 mm²/s); D: The mass is hyperperfused on color coded perfusion image; E: Type B time intensity curve shows a 48% washout ratio; F, G, and H: K_trans, K_ep, and V_e values on quantitative perfusion images were 1.058 min^-1, 3.391 min^-1, and 0.356, respectively. ADC: Apparent diffusion coefficient.