A videofluoroscopic swallow study (VFSS) is a diagnostic test used to evaluate swallowing function. During the procedure, a patient swallows food or liquid mixed with a small amount of barium, a contrast material that makes the swallowing process visible on X-ray. This allows healthcare professionals to observe the movement of the throat and esophagus in real-time. The VFSS helps identify swallowing difficulties, known as dysphagia, and can guide treatment options. It is typically performed by a speech-language pathologist and a radiologist in a specialized setting, ensuring a safe and accurate assessment of the patient's swallowing abilities.