News tagged with x rays
A team including scientists from The Scripps Research Institute (TSRI), the University of North Carolina at Chapel Hill and the Chinese Academy of Sciences has determined and analyzed the high-resolution ...
Medical research Mar 21, 2013 | 4.8 / 5 (5) | 0 |
Adding a photo of a face to x-ray images can reduce "wrong-patient" errors five-fold, a new study finds.
Cancer Apr 15, 2013 | 4.5 / 5 (2) | 0
Researchers from North Carolina State University and the University of North Carolina at Chapel Hill (UNC) have developed a new tool to help surgeons use X-rays to track devices used in "minimally invasive" ...
Surgery Apr 16, 2013 | 4.5 / 5 (2) | 0 |
Scientists from the Florida campus of The Scripps Research Institute (TSRI) have defined the molecular structure of an enzyme as it interacts with several proteins involved in outcomes that can influence neurodegenerative ...
Medical research Nov 08, 2012 | 3.5 / 5 (2) | 0 |
By the age of 20, most people have reached skeletal maturity and do not grow any taller. Until recently it was assumed that skeletal enlargement elsewhere in the body also stopped by age 20.
Health May 25, 2011 | 5 / 5 (1) | 1 |
Are your bones getting stronger or weaker? Right now, it's hard to know. Scientists at Arizona State University and NASA are taking on this medical challenge by developing and applying a technique that originated ...
Medical research May 28, 2012 | 5 / 5 (1) | 0 |
A sports hernia is a common cause of groin pain in athletes, however until lately little has been known as to why they occur. Researchers presenting their study today at the American Orthopaedic Society for Sports Medicine's ...
Diseases, Conditions, Syndromes Jul 13, 2012 | 5 / 5 (1) | 0
Scientists provide detailed view of brain protein structure: Results may help improve drugs for neurological disorders
Researchers have published the first highly detailed description of how neurotensin, a neuropeptide hormone which modulates nerve cell activity in the brain, interacts with its receptor. Their results suggest that neuropeptide ...
Medical research Oct 10, 2012 | 5 / 5 (1) | 0 |
(Medical Xpress)—Researchers in the Life Sciences Institute at the University of Michigan have discovered how a particular type of virus hides and protects its genetic information from the immune system, ...
Medical research Nov 07, 2012 | 5 / 5 (1) | 0 |
(Medical Xpress)—Research carried out by Professor Barbara Pierscionek and a team of fellow vision experts suggests that the way proteins are distributed in the lens of the eye may cause its gradient to ...
Ophthalmology Mar 01, 2013 | 5 / 5 (1) | 0
Thanks to a rare bacteria that grows only on rocks in the Swiss Alps, researchers at The University of Texas at Austin and the Pasteur Institute in France have been the first to identify how alcohol might ...
Medical research Apr 25, 2013 | 5 / 5 (1) | 2 |
Researchers at Tokyo Institute of Technology report details on the biological mechanisms through which cells degrade own cellular material, allowing them to survive starvation conditions.
Medical research May 17, 2013 | 5 / 5 (1) | 0 |
A Japanese cancer specialist said Wednesday she has started the world's first clinical trial of a powerful, non-surgical, short-term radiation therapy for breast cancer.
Cancer May 22, 2013 | 5 / 5 (1) | 0
Researchers including members from the Niels Bohr Institute at the University of Copenhagen have developed a new method for making detailed X-ray images of brain cells. The method, called SAXS-CT, can map ...
Neuroscience May 12, 2011 | 4 / 5 (1) | 0
The idea of probing the body's interior with radiation stretches back to experiments with X rays in the 1800s, but more than a century later, images taken with radiological scans still are not considered reliable ...
Cancer Apr 13, 2011 | 3 / 5 (1) | 0
X-radiation (composed of X-rays) is a form of electromagnetic radiation. X-rays have a wavelength in the range of 10 to 0.01 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3 × 1016 Hz to 3 × 1019 Hz) and energies in the range 120 eV to 120 keV. They are shorter in wavelength than UV rays. In many languages, X-radiation is called Röntgen radiation after Wilhelm Conrad Röntgen, who is generally credited as their discoverer, and who had called them X-rays to signify an unknown type of radiation.:1-2
X-rays are primarily used for diagnostic radiography and crystallography. As a result, the term X-ray is metonymically used to refer to a radiographic image produced using this method, in addition to the method itself. X-rays are a form of ionizing radiation and as such can be dangerous.
X-rays from about 0.12 to 12 keV are classified as soft X-rays, and from about 12 to 120 keV as hard X-rays, due to their penetrating abilities.
The distinction between X-rays and gamma rays has changed in recent decades. Originally, the electromagnetic radiation emitted by X-ray tubes had a longer wavelength than the radiation emitted by radioactive nuclei (gamma rays). So older literature distinguished between X- and gamma radiation on the basis of wavelength, with radiation shorter than some arbitrary wavelength, such as 10−11 m, defined as gamma rays. However, as shorter wavelength continuous spectrum "X-ray" sources such as linear accelerators and longer wavelength "gamma ray" emitters were discovered, the wavelength bands largely overlapped. The two types of radiation are now usually defined by their origin: X-rays are emitted by electrons outside the nucleus, while gamma rays are emitted by the nucleus.
For more information about X-ray, read the full article at
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