Medical Matters - Series 3 - Episode 7

7/8. You can't feel it and you certainly can't hear it but ultrasound encourages damaged tissues to heal, destroys tumours and even blasts kidney stones apart. Yet it also allows us to look inside our bodies to see unborn babies. Cathy MacDonald finds out how this Scottish invention, originally used to detect flaws in tank armour, has become essential in almost every branch of medicine.