Reference Terms
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Positron emission tomography
Positron emission tomography (PET) is a nuclear medicine medical imaging technique which produces a three dimensional image or map of functional processes in the body.
Note: The above text is excerpted from the Wikipedia article "Positron emission tomography", which has been released under the GNU Free Documentation License.
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Matter & Energy News
February 24, 2025
Feb. 21, 2025 — Researchers are blurring the lines between robotics and materials, with a proof-of-concept material-like collective of robots with behaviors inspired by ...
Feb. 19, 2025 — From a tiny electric jolt when touching a doorknob to styrofoam peanuts that cling to a mischievous cat's fur -- the well-known and seemingly simple phenomenon of static electricity has puzzled ...
Feb. 19, 2025 — Scientists have discovered how to turn common minerals into materials that spontaneously remove and store carbon dioxide from the atmosphere. In the lab, the materials pull CO2 from the air thousands of times faster than occurs with natural rock ...
Feb. 13, 2025 — What if time is not as fixed as we thought? Imagine that instead of flowing in one direction -- from past to future -- time could flow forward or backward due to processes taking place at the quantum ...
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Feb. 24, 2025 — A team has used a process known as DNA origami to make electrochemical sensors that can quickly detect and measure ...
Feb. 24, 2025 — A computer science team has developed a sensor-based technology that could revolutionize commercial beekeeping by reducing colony losses and lowering labor costs. The technology uses low-cost heat ...
Feb. 24, 2025 — Researchers demonstrated that brewing tea naturally adsorbs heavy metals like lead and cadmium, effectively filtering dangerous contaminants out of drinks. Researchers tested different types of tea, ...
Feb. 19, 2025 — A new study of more than 1400 adults who gamble and play online video games has found loot box buying is associated with real-world gambling, video ...
Feb. 19, 2025 — Researchers have unveiled a transformative framework for understanding complex systems. This pioneering study establishes the new field of ...
Feb. 21, 2025 — Researchers have identified the origin of the restoring force that lets elastic crystals return to their original ...
Feb. 21, 2025 — Optical atomic clocks can increase the precision of time and geographic position a thousandfold in our mobile phones, computers, and GPS systems. ...
Feb. 21, 2025 — A research team has developed a groundbreaking method for synthesizing perovskite nanocrystals (PNCs), a next-generation semiconductor material, in a more uniform and efficient manner. This study is ...
Feb. 21, 2025 — Photonics researchers have demonstrated how self-imaging of light, a phenomenon known for nearly two centuries, can be applied to cylindrical systems, facilitating unprecedented control of light's ...
Feb. 21, 2025 — A hybrid microscope allows scientists to simultaneously image the full 3D orientation and position of an ensemble of molecules, such as labeled ...