imhere, it is not OCT. Digital x-ray (digital radiography) is still x-ray, but UP TO 90% less radiation. OCT still is up to 10 times more powerful. It is similar to OCT in that a pen like device is used to scan surfaces and give a picture on a computer screen. Therefore it is less radiation than typical x-ray, faster, with immediate viewing and electronic storage capabilities. It is a vast improvement over conventional x-ray, but still no where near the advancement of OCT.