Tag: "rays" at medical news
Childhood sun exposure may lower risk of MS
...alifornia in Los Angeles. Exposure to ultra violet rays
may induce protection against MS by alternative mechanisms, either directly by altering the cellular immune response or indirectly by producing immunoactive vitamin D. The study also found the protective effect of sun exposure was seen only among f...
Speeding up CT scans with cellphone technology, ultrasound warning signal for breast cancer
... and cancer patients everywhere. Compared to the x rays
conventionally used in radiation therapy, protons are potentially more effective, as they can deposit more cell-killing energy in their tumor targets and less in surrounding healthy tissue. However, to kill tumors, the protons must be accelerated to...
Less sun better than using sunscreen
...sunlight and wearing clothes which stop harmful UV rays
from reaching the skin, rather than sunscreen, are...ing them denser) are better at stopping harmful UV rays
reaching the skin, while wet or stretched materials, and those that have been bleached, are not so g...
'Smart' sunglasses and goggles let users adjust shade and color
...nown as photochromic lenses. These use incoming UV rays
to trigger a chemical reaction that darkens the lens, but users can't adjust the shade. Also, the lenses may stay bright under strong midday light or get too dark in low-level evening light due to the angle of incoming rays. And photochromic lenses h...
Ultrasound mammography, volcano monitoring for aircraft safety
...d his colleagues use ultrasound waves instead of x rays
to image breast tissue. According to Duric, the advantages of using ultrasound over x rays
are that no radiation is used and compressing the breast is not necessary. In the new approach, unl...
Safer suntans through science
...d often protect only against UVB rays, not the UVA rays
blamed for some skin cancers and photo-aging of skin. People with more melanin in their skin have darker skin that is naturally more resistant to sun damage because the melanin which is actually part of the epidermis acts as a wonderful natural suns...
Keep slapping on that sunscreen
...sunscreen can increase damage to skin caused by UV rays
is startling, says a spokeswoman for the Skin Cancer Foundation. "It's a very strong statement they're making." The take-home message? Reapply regularly....
Osteoarthritis initiative releases first data
...nd disability in older people. Images, including x rays
and magnetic resonance imaging scans, will also be...gical specimens (blood, urine, and DNA); images (X rays
and magnetic resonance scans); and clinical data such as dietary intake, medication use and pain, fu...
Potential association between skin cancer cream and improvements of prematurely aged skin
...he result of a lifetime of exposure to ultraviolet rays
of the sun. Long-term exposure to the ultraviolet rays
of the sun can also cause structural and cosmetic damage to the skin commonly referred to as photoda...
New 'implanted contacts' designed to fix nearsightedness
...nearsightedness, known as myopia, by bending light rays
to improve blurry distance vision without the need for glasses or contacts. Dr. Bowman said the lens currently is approved only for nearsightedness, but it may eventually be available for farsightedness and astigmatism. It has been used for nearsight...
Melanoma risk only partially associated vith exposure to UVB from sunlight
...ith exposure to ultraviolet B (UVB) radiation, the rays
in sunlight that increase in summer and cause sunb...rchers say that ultraviolet A (UVA) radiation, the rays
in sunlight that reach the deeper layers of skin and are associated with signs of aging, can damage ...
Mountainous plateau creates ozone 'halo' around Tibet
...that protects the globe from the sun's ultraviolet rays
can be found;for this reason stratospheric ozone is often referred to as "good" as opposed to the ground-level ozone from pollution which is referred to as "bad". When the tropopause decends, the ozone descends with it. "Most people think about the m...
Detecting Alzheimer's in the eye, lifting fingerprints without touching the surface
...d is opposite that of most normal materials),light rays
can be refracted in such a way as to focus planar wavesinto nearly a point, though over a very short region, usually only atenth or so of the wavelength of the light. Such near-field opticsare not applicable for such uses as reading glasses or teles...
4D proton therapy, radiation-resistant tumors, interpreting medical images
...ING LUNG CANCER WITH 4D PROTONS Compared to the x rays
traditionally used in radiation therapy, protons offer the ability to destroy lung tumors just as competently while inflicting less damage to surrounding healthy tissue. In a small experimental patient study, researchers have increased the effective...