X-ray image of ordinary electrons or waveshaped electrons (IMAGE)
Caption
(a) Ordinary electrons without wave shaping have a uniform wave pattern when they travel. In simulations, the electrons collide with the atoms in graphene (red spheres represent graphene atoms and blue bars represent the bonds between them; red circular rings represent the positions of the graphene atoms). After the collision, X-rays are emitted in broad directions. The diverging X-rays produced can be used for X-ray imaging, such as for a hand, but the image is dim and its quality is not very high. (b) The electrons are waveshaped using a waveshaping instrument, such as a phase plate, and they form regular wave patterns (green rings) that overlap with the positions of the graphene’s atoms (red circular rings). With these specially shaped electron wave patterns, X-rays which are brighter and directional can be generated. These X-rays can be used to image smaller areas of the body, like finger joints, at high quality.
Credit
by Lee Wei Wesley Wong, Xihang Shi, Aviv Karnieli, Jeremy Lim, Suraj Kumar, Sergio Carbajo, Ido Kaminer and Liang Jie Wong
Usage Restrictions
Credit must be given to the creator.
License
CC BY