only 3% is killing. >> interesting. you actually also once told me that a tumor that is starting to grow, you can actually catch a tumor before it gross because it's like a construction site. and that the blood vessels have to build roads towards the site before a tumor can actually grow. so you can actually read the body, read with this doppler and see where there might it be problems. as well, you also said that you can read whether a tumor is benign or malignant by that same indication. if there are blood vessels flowing to it, that's why you're talking about the flow of blood? >> exactly. let me rephrase that. >> yes, please. >> you can see if the tumor is aggressive or not. >> okay. >> for instance, i had a fellow in today, i said aid the mri shows something that he brought into me. i did my sonogram scan which is a 3-d specialized scan. it only takes five minutes because it's computerized.