Similar to X-ray CT scans: first 3-D images of living cell created

Scientists at the Massachusetts Institute of Technology (MIT) have created the first three-dimensional images of a living cell by using a method similar to the X-ray CT scans, which enable doctors to see inside the body.
They say that the new technique will help produce the most detailed images of what goes on inside a living cell. The procedure will not require the use of fluorescent markers or other externally added contrast agents, radio reported.
The team has created three-dimensional images of cervical cancer cells, and imaged a small worm called Caenorhabditis elegans as well as several other cell types, with the help of the new technique.
For so doing, the researchers used a technique known as interferometry, in which a light wave passing through a cell is compared with a reference wave that does not pass through it. A two-dimensional image containing information about refractive index is thus obtained.
Combined 100 two-dimensional images taken from different angles, the researchers created a three-dimensional one. The resulting images are essentially 3D maps of the refractive index of the cell's organelles. The entire process took about 10 seconds, but the researchers recently reduced this time to 0.1 seconds.