This book explores the technology, diagnostic applications and potential benefits and risks of ultrasonography. Topics discussed in this compilation include the contemporary role of ultrasound in prostate biopsy; ultrasound in the management of ischemic stroke; the role of endoscopic ultrasonography in pancreatic solid masses; standard screening procedures of ultrasonographic examinations when surveying cervical lymph nodes in patients with oral squamous cell carcinoma; and pre-analytical error in ultrasonography.