This book offers a clear and practical overview of how ultrasonography is used to evaluate various conditions in the head and neck region. It covers basic principles of ultrasound, step-by-step scanning techniques, and detailed guidance on examining key structures such as the thyroid gland, salivary glands, lymph nodes, and soft tissues. The book also includes information on identifying common abnormalities, using Doppler imaging to assess blood flow, and performing image-guided procedures. It is designed to support both learning and clinical practice for healthcare professionals involved in head and neck imaging.