iodine base contrast or some other heavy metal phase contrast even then you'll miss some of the smaller vessels because x-ray does not give you enough contrast for vessel imaging so we all know the importance of blood vessels this is a depth result or be scanned image showing you some of the standard skin structures now we're working with our dermatology department you apply this technology for melanoma imaging we've also miniaturized the probe so we can use this technology in the GI tract all right so you have to make the device