Monday, January 12, 2009
IBM microscope 100 million times stronger than MRI
BM Research on Monday announced that it has built a new nanoscale microscope capable of creating images with 100 million times finer resolution than existing MRI technology. The project was made possible through a process called magnetic resonance force microscopy, which, according to IBM, detects "ultra-small magnetic forces. The technique is said to be able to "see" beneath surfaces and be safe for sensitive biological materials.
IBM said that it ran a test using the new system that established for the first time, magnetic resonance imaging on nanometer-scale items. By running it on a tobacco mosaic virus that is 18 nanometers across--18 billionths of a meter--the new system achieved resolution down to four nanometers.
According to IBM Research, this is an image of the most important features of a magnetic resonance force microscope: 'An ultrasensitive silicon cantilever detects the tiny magnetic force between a nanoscale magnetic tip--green--and the hydrogen nuclei present in the virus particles placed at the end of the cantilever--blue, seen in the reflection. Nanoscale magnetic resonance imaging is achieved by manipulating the hydrogen nuclei in the sample with a radiofrequency magnetic field generated by a 'microwire'--red. A sensitivity improvement of 100 million is achieved compared to conventional magnetic resonance imaging.'