Sentences with phrase «radiation dose for»

With the exception of mammography, there is no federal regulation of radiation dose for medical tests, leaving the appropriate use of heart imaging in the hands of clinicians and imaging facilities.

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.

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.

«Unfortunately, healthcare providers including physicians, radiologists, and medical imaging technologists are often not aware of radiation doses for common CT scans,» concluded Dr. Leswick.

Not exact matches

«There are no official dose limits for aircrew in the United States,» the US Centers for Disease control writes in its aircrew safety guidelines on cosmic radiation.

Researchers blasted rats with full - body doses of RF radiation (mostly at higher levels than those associated with cell phones) from the time they were born until they were two years old for nine hours a day.

They're also advised to avoid flying when the sun is having a solar particle event, which can deliver a higher dose of radiation in one flight than is recommended for the entirety of a pregnancy.

For example, it is well known that nuclear radiations are dangerous in large doses and this was used as an argument against nuclear power.

While this may all sound very upsetting, the vast majority of plain x-rays, like the kind you'd have for a broken bone or at the dentist's office, have few lose doses of radiation.

Even in small doses, exposure to radiation is problematic for a developing baby and mom.

In fact, it is the accumulation of radiation dose that is the limiting factor for the maximum length of manned space flights.

A new screening tool for prostate cancer, the prostate - specific antigen test, enabled doctors to detect it earlier in more men, and patients were flocking to hospitals for low doses of conventional photon radiation.

APRIL 1960 RADIATION — «With the new measurement of the mean lethal dose for reproductive function of mammalian cells, it is now possible to explain the relatively low mean lethal dose of 400 to 500 roentgens for the entire body.

Assuming that the values and parameters for speed, radiation dose and risk stated above for Stuker are also true for you, dividing your total miles by 3,700,000,000 will give your approximate odds of getting cancer from your flying time.

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

For three weeks beforehand, Christine Hill - Kayser, the child's radiation oncologist, worked out with colleagues just how strong a dose to deliver, and where in his pelvic area to direct the beam.

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

«Randomized trials have confirmed the value of radiation dose escalation for prostate tumors, and the potential benefits of larger radiation doses in fewer fractions, are expected to increase the therapeutic efficacy for men with prostate cancer,» said Anders Widmark, MD, a professor of radiation sciences at Umeå University in Umeå, Sweden and lead author of the study.

Previous studies also demonstrate that moderate hypo - fractionated radiation therapy (HRT), consisting of daily treatment for one month using a larger dose per treatment, provides a similar low risk of recurrence, and may even be lower with HRT than CRT.

Previously, studies have consistently demonstrated that conventionally fractionated high dose external beam radiation therapy (CRT), consisting of daily treatment for two months, decreases prostate cancer recurrence, and improves metastasis - free survival.

The detector developed at UNH, known as DoSEN, short for Dose Spectra from Energetic Particles and Neutrons, measures and calculates the absorbed dose in matter and tissue resulting from the exposure to indirect and direct ionizing radiation, which can change cells at the atomic level and lead to irreparable damDose Spectra from Energetic Particles and Neutrons, measures and calculates the absorbed dose in matter and tissue resulting from the exposure to indirect and direct ionizing radiation, which can change cells at the atomic level and lead to irreparable damdose in matter and tissue resulting from the exposure to indirect and direct ionizing radiation, which can change cells at the atomic level and lead to irreparable damage.

«In an earlier phase I clinical study, our group has shown that increasing the dose of radiation delivered daily with high precision and using image guidance may offset the need for chemotherapy in improving survival, and it may also improve quality of life measures by reducing treatment periods in half.

At one extreme, the scientists estimated fly ash radiation in individuals» bones at around 18 millirems (thousandths of a rem, a unit for measuring doses of ionizing radiation) a year.

The radiation - sensitive rats that received higher doses of radiation had a higher concentration of transporters for the neurotransmitter dopamine, which plays a role in vigilance and attention, says Catherine M. Davis, Ph.D., a postdoctoral fellow in the Department of Psychiatry and Behavioral Sciences and the study's first author.

«Our preclinical data suggest that combining low doses of these inhibitors will enhance the clinical effects of both drugs as a potential treatment for patients with AML,» says the senior author, Feyruz V. Rassool, PhD, associate professor of radiation oncology at the University of Maryland School of Medicine (UM SOM) and a researcher at the University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center (UMGCCC).

The radiation dose they calculated was 0.66 sieverts, researchers report in the May 31 Science; the agencies» limit for astronauts is 1 sievert.

«It is important for healthcare professionals (including referring physicians, radiologists, and technologists) to be aware of radiation dose levels and risks from imaging tests for several reasons, including the ability to weigh the risks and benefits of tests, counsel patients on relevant risks, optimize protocols to minimize radiation dose, and select appropriate protocols to minimize radiation dose.»

Presenting these results at the 3rd ESTRO Forum in Barcelona, Spain, today (Monday) Professor James Morris, from the Department of Radiation Oncology, Vancouver Cancer Centre, British Columbia Cancer Agency (BCCA), Vancouver, Canada, will say that the ASCENDE - RT1 trial is the first and only existing trial comparing low - dose - rate prostate brachytherapy (LDR - PB) for the curative treatment of prostate cancer with any other method of radiation therapy delivery.

«A Silent Crisis: Cancer Treatment in Developing Countries» Is a 2003 report from the International Atomic Energy Agency addresses the challenges of providing sufficient infrastructure — in particular, trained staff to deliver safe and effective radiation doses — for cancer treatment.

For more than a century, scientists have assumed your body reacts to that radiation in much the same way it does to high doses — only on a much smaller scale.

But their major effect would have come from radiation, which the KU astrophysicist said would have packed doses equivalent to one CT scan per year for every creature inhabiting land or shallower parts of the ocean.

Surprisingly, low - dose radiation takes longer for the body to repair than damage from high doses does.

If these could be targeted to tumours — by attaching them to antibodies that recognise cancer cells, for instance — it would then be possible to destroy the malignant cells» DNA using lower doses of radiation or drugs.

It also has a key role to play for the future of radiation vaccine research — called RadVax for short — in which doctors are trying to understand why targeted doses of radiation can boost the body's entire immune system in select cases.

For instance, Chumak and his colleagues developed a way to estimate doses people received by analyzing tooth enamel for effects of ionizing radiatiFor instance, Chumak and his colleagues developed a way to estimate doses people received by analyzing tooth enamel for effects of ionizing radiatifor effects of ionizing radiation.

However, Juno's special orbit allows the radiation dose and the degradation to accumulate slowly, allowing Juno to do a remarkable amount of science for 20 months.

For every hundred feet of altitude, the annual dose from radiation increases by 1 millirem per year.

Due to the meltdown in that reactor, radiation levels are too high for any human to enter without receiving an unacceptable dose.

18 Another species, Deinococcus radiodurans, can survive almost 10,000 times the dose of radiation lethal to humans, making it a prime candidate for the cleanup of nuclear waste.

In the largest prospective study to date, following women for 8 years post treatment, 81 women were asked to hold their breath during radiation treatment for breast cancer - a process that was repeated until therapeutic dose was reached.

Additional work recently presented at the 2014 American Society for Radiation Oncology in San Francisco carried the work further in order to determine whether protection from the additional radiation dose in fact translated to a reduction in ischemic heart disease.

«In extreme cases, if the dose is too high radiation can modify the cellular structure and generate alteration in the cells of organs found near the tumor, this causes them to lose their functions,» said Massillon, who was honored for her research with the IUPAP Young Scientist Prize 2015 awarded by the International Union of Pure and Applied Physics.

«This study draws attention to the common consensus that the use of low - dose CT scans for image guidance for children is important for quality treatment and to ensure treatment accuracy,» said Stephanie A. Terezakis, MD, co-author of the study and assistant professor of radiation oncology and molecular radiation sciences at Johns Hopkins Sidney Kimmel Comprehensive Cancer Center in Baltimore.

Now, researchers are hoping to improve this imaging technique, known as molecular breast imaging or breast specific gamma imaging, with better image quality and precise location (depth information) within the breast, while reducing the amount of radiation dose to the patient for these procedures.

Choosing optimal IGRT regimens that spare healthy tissue and organs is a particular concern for pediatric patients to help prevent potential late effects associated with the distribution of the radiation dose and the total radiation dose the patient receives.

The safety study sets the stage for phase II clinical trials looking at whether high dose vitamin C is effective at extending overall lifespan and quality of life for patients undergoing radiation and chemotherapy.

Looking forward, the researchers are now hoping to examine other Ediacaran sediments from around the globe to verify the rapid reversals» signal, along with hunting for biological or chemical evidence for high doses of UV radiation in the fossil record.

Chernobyl was directly responsible for at least 56 deaths and as many as 4,000 more, according to the World Health Organization, though other estimates vary, and spread radioactive material as far as the U.K. Three Mile Island has never been conclusively linked to any deaths or health effects, though some individuals may have received radiation doses of as high as 100 millirems.

The gauntlet Juno ran at Jupiter held many chances for catastrophe: The spacecraft might have been knocked out by intense magnetic fields (at that distance, 20 times stronger than Earth's), ionizing radiation (a total dose of 265 rads — more than enough to kill a human being), dust particles from Jupiter's rings (from which the main engine was completely unshielded) or loss of power if the solar arrays were unable to reorient to the sun.

That's why advocates have pushed for a «Europa Clipper» concept that would spin around the moon in multiple flybys, rather than calling for an orbiter — a more difficult and expensive mission that would subject the spacecraft to much greater doses of radiation from Jupiter.