Arteries carry oxygenated blood away from your heart. They have thick walls and a muscular layer that keeps your blood moving. Arteries can be as wide as a nickel (about two centimeters). They are the ...

"Ultrasound can image centimeters deep in opaque mammal tissue, allowing non-invasive imaging of whole organs. This gives us information about how cells behave in their natural environment, something ...

While medical centers use ultrasound daily, so far this technology has not been capable of observing body tissues at the scale of cells. Physicists have now developed a microscopy technique based on ...