Doctors at the Sunnybrook Health Sciences Centre in Toronto have recently made a major medical breakthrough: using ultrasound waves they have successful delivered chemotherapy deep into the brain tumor of a cancer patient. The reason that this is such a breakthrough is because of the blood-brain barrier, which normally blocks drugs from entering the...

Advancements in ultrasound-guided needle procedures have allowed clinicians to nearly perfect regional anesthesia procedures, needle biopsies, central line placement, and other procedures for the diagnosis and treatment or disease.  Though a variety of techniques are used to track the path of the needle, most cases require the practitioner to first identify the desired...