Microbubbles in human salivary glands

<p>Supplementary video: a video captured from the ultrasound machine, illustrating the variable penetration patterns of microbubbles into glandular tissue. Videos of (A) left parotid gland with complete homogeneous dense penetration of microbubbles. (B) Right submandibular gland (SMG) with complete, inhomogeneous dense penetration of microbubbles. (C) Right parotid gland with complete homogenous penetration of microbubbles with moderate density. (D) Left SMG with no penetration of microbubbles. Only the main duct is visible.</p>