News tagged with x rays
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
A study of veterans at high risk for developing lung cancer shows that low-dose computed tomography (LDCT) can be highly effective in helping clinicians spot tiny lung nodules which, in a small number of patients, may indicate ...
Cancer May 21, 2013 | not rated yet | 0
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 |
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 |
New research findings may help scientists design drugs to treat a virus infection that causes potentially fatal brain swelling and paralysis in children.
Medical research Mar 21, 2013 | not rated yet | 0 |
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 |
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 |
(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 |
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 |
University of Massachusetts Amherst researchers, experts in revealing molecular structure by X-ray crystallography, have identified two new small "chaperone" molecules that may be useful in treating the inherited ...
Medical research Oct 09, 2012 | not rated yet | 0 |
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 |
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 |
Lung cancer is associated with very high mortality, in part because it is hard to detect at early stages, but also because it can recur frequently after surgical removal. The question arises as to what is the best way to ...
Cancer May 06, 2013 | not rated yet | 0
A key building block in the Schmallenberg virus could be targeted by anti-viral drugs, according to a new study led from the University of Leeds.
Medical research Apr 17, 2013 | not rated yet | 0 |
Tablet computers such as the iPad are becoming more and more popular, but new research from the University of Sydney means they could soon be used in hospitals as a tool for doctors to view medical imaging.
Other Feb 21, 2012 | not rated yet | 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
This text uses material from Wikipedia and is available under the GNU Free Documentation License.