Abstract
We developed nano-silver (Ag) particles, instead of nano-ferromagnetic particles, by using microwave synthesis methods in order to get a clearer imaging under high radiation energy (> 35Kev). Mice born in before two weeks, which were perfused were injected nano-Ag solvents into their portal vein and coronary arteries. We succeeded to make clearer images for various branches of their vessels at 35KeV synchrotron radiation energy. We found that the narrowest diameter of vessels has about 0.02mm, which is a limit of spatial resolution of observations of living bodies. Since the strong transmitted X-ray beam is utilized to get the contrast of various tissues and organs, it is said to be a technological limits of present CCD cameras.