Sentences with phrase «radiation dose»

Most of the experiments were done under precise conditions, at a wide range of radiation doses and usually for the lifetime of the animals.

That allows for high radiation doses in the tumor, while the nearby important organs (e.g. eyes, brain surrounding the tumor) receive much lower doses of radiation than the tumor.

While high radiation doses can eventually cause cancer, the immediate health effect is to destroy dividing cells — including blood cells — which wipes out the immune system.

In a new study, experts found that most American labs do not comply with radiation dose recommendations for heart tests.

According to the statement, clinicians ordering imaging tests should understand when each type of test is appropriate, the typical average radiation dose and the potential risks.

About 80 percent of patients receiving high - dose, short - course therapies had good cosmetic results, similar to longer - course treatments with smaller radiation doses.

That's about one - third the maximum radiation dose allowed for a nuclear power plant worker in a given year.

The result: estimated radiation doses ingested by people living near the coal plants were equal to or higher than doses for people living around the nuclear facilities.

This can not be used to make a nuclear bomb, but it gives a lethal radiation dose in close quarters.

It's more comparable to the background radiation dose in a single day.

The Japanese earthquake, tsunami which have been followed by massive problems have much of the world now concerned about radiation doses.

Studies of atomic bomb victims, nuclear workers and medical radiation patients have allowed scientists to estimate the cancer risk for any particular radiation dose.

The survey indicated that 93 % of respondents were interested in radiation dose feedback when considering ordering a CT scan.

In contrast, lowering the heart radiation dose will not significantly lower the rate of cardiovascular disease, but it will reduce the severity.

When the farm knows of an approaching hotter - than - usual summer season, for example, growers can increase UV radiation doses.

In some parts of the world, average human radiation dose has almost doubled and that is almost entirely due to medical procedures.

Although the shorter therapy requires higher radiation doses, the experts found that this option may result in better quality of life.

Any potential thief would receive a disabling and lethal radiation dose in a matter of minutes.

Here's a chart (click to enlarge) comparing ionizing radiation doses from a host of different activities and sources, ranging from eating a banana to living in Denver:

CRaTER characterizes the global lunar radiation environment by measuring radiation dose rates from galactic cosmic rays and solar energetic particles.

The report also points out that RTZ's records on radiation doses show that before 1982 individual workers were exposed to more than the permissible doses in the final processing areas, where ore is roasted to recover uranium oxide.

«Although risk from radiation dose levels in the range of medical imaging procedures is small, it is real as evidenced from atomic bomb survivors and nuclear industry workers showing significantly increased risk of malignancy after exposure to doses in the range of diagnostic CT,» said Dr. Leswick.

«There is a need for consensus recommendations for ionizing radiation dose optimization and a regulation of dose metrics across imaging procedures,» said lead author Kevin D. Hill, MD, Division of Pediatric Cardiology, Duke University Medical Center.

The large cosmic ray - induced radiation dose at the surface may also prove problematic for future human exploration of Mars (e.g. Saganti et al. 2004).

Chesser says some of his group's studies of mice exposed to radioactivity around Chernobyl hint at hormesis: Small exposures over 10 to 45 days, they found, appeared to temper damage from an acute radiation dose delivered in the lab later.

A new study by Dr. Guerda Massillon, researcher at the National University of Mexico (UNAM), looked at the properties of various materials called dosimeters that measure radiation doses.

«The ability to accelerate image acquisition and reduce radiation dose opens up new horizons, particularly in life sciences and soft matter research, by electron tomography,» says Prof. Rafal Dunin - Borkowski.

Diagnostic Radiology at Boston Children's is designed to facilitate high - quality and rapid x-ray examinations using the lowest possible radiation doses for your child, no matter her size, age or medical condition.

Scientists used those data to extrapolate how many excess cancer cases would develop at lower radiation doses.

«Radiologists have had to rely on a trial - and - error approach to optimizing CT radiation dose.

This has strong implications for astrobiology and planetary habitability as any putative life forms near the surface would be exposed to large radiation doses capable of sterilizing the top ~ 20 cm of the Martian subsurface (Simonsen & Nealy 1993; Mileikowsky et al. 2000; Pavlov et al. 2002; Dartnell 2011; Dartnell et al. 2007a, 2007b, 2010).

They abandoned a collective radiation dose limit when it was discovered that the Yucca site could not meet it, and, just last year, the EPA promulgated final standards for licensing Yucca Mountain that rely on dilution of nuclear waste as opposed to containment.

The survey found that while most respondents recognized there is an increased risk of cancer from CT, many underestimated the actual radiation dose.

They mostly just go through us, but because of their large numbers contribute about 1/6 of our normal radiation dose.

358 Walter Pearce «Chernobyl is definitely not a haven for wildlife» EVACUATE DENVER!!!! If you live in Chernobyl the total radiation dose you get each year is 390 millirem.

Radiation - induced pulmonary fibrosis — tissue scarring that can permanently impair lung function — limits the delivery of therapeutic radiation doses to non-small cell lung cancer.

Three dimensional radiation therapy planning software uses the patient's computed tomographic or magnetic resonance images to plan precise radiation doses to the cancerous tissue.

Using this kind of sensor, doctors may be able to better determine radiation doses and to monitor whether treatments are having the desired effect, according to the researchers, who describe the device in the Proceedings of the National Academy of Sciences the week of April 21.

As part of the Building a Better Explainer project at N.Y.U.'s Studio 20, we decided to create a visual explainer of radiation levels, inspired by some recent presentations over at XKCD and Information is Beautiful.Both compare radiation doses from everyday activities (like eating a banana or flying across the country) to doses near the Fukushima plant, as well as other disasters like Chernobyl.

Oncospace A radiation oncology physicist developed a complex computerized system, called «Oncospace,» that uses anatomy, radiation dose distributions, toxicity, and outcome data of prior patients to create an optimal treatment plan for those about to be treated.

Proton therapy delivers high radiation doses directly to the brain tumor site, with no damage to nearby healthy tissue.

The imaging software — developed and currently in use only at Cincinnati Children's — mathematically determines the lowest possible radiation dose for the patient before a scan is performed, according to the study led by David Larson, MD, radiology quality and safety director at the medical center and principal architect of the technology.

We're already worried about Mars - bound explorers driving each other crazy stuck in a tin can for six months, not to mention soaking up unacceptably high space radiation doses.

Among the advances that have already been made are linear accelerators that generate higher - energy radiation beams, and more versatile patient tables that enable radiation doses to be delivered to the tumor from a variety of angles and directions.

He had used cloned mice with identical tumors to determine ideal radiation doses before turning to protons.