Ultrasound: A painless imaging test that uses sound waves to create pictures of the gallbladder. It helps detect gallstones, inflammation, or bile duct blockages. If gallstones are present ...

Objective: Conventional fine-needle aspiration biopsy (FNAB) for cystic thyroid nodules (CTNs) has a high rate of nondiagnostic and false-negative results. Ultrasound-guided FNAB (UG-FNAB ...