Navigation Links
Lifetime cancer risk from heart imaging low for most children; rises with complex tests
Date:6/9/2014

DURHAM, N.C. -- Children with heart disease are exposed to low levels of radiation during X-rays, which do not significantly raise their lifetime cancer risk. However, children who undergo repeated complex imaging tests that deliver higher doses of radiation may have a slightly increased lifetime risk of cancer, according to researchers at Duke Medicine.

The findings, published June 9, 2014, in the American Heart Association journal Circulation, represent the largest study of cumulative radiation doses in children with heart disease and associated predictions of lifetime cancer risk.

Children with heart disease frequently undergo imaging tests, including X-rays, computed tomography (CT) scans and cardiac catheterization procedures. The number of imaging studies patients are exposed to depends on the complexity of their disease, with more serious heart conditions typically requiring more testing.

Although children benefit from advanced imaging procedures for more accurate diagnosis and less invasive treatment, the increase in radiation has potential health risks.

"In general, the benefits of imaging far outweigh the risks of radiation exposure, which on a per study basis are low," said senior author Kevin D. Hill, M.D., M.S., an interventional cardiologist and assistant professor of pediatrics at Duke University School of Medicine.

"We know that each of these individual tests carries a small amount of risk, but for patients who get frequent studies as part of their care, we wanted to better understand the risk associated with repeated exposure."

Hill and his colleagues studied a group of 337 children ages six and younger who had one or more surgeries for heart disease from 2005 to 2010. During the five-year study period, the children received an average of 17 imaging tests each as part of their medical care before and after their surgeries.

In order to estimate the amount of radiation delivered in the tests, the researchers used a combination of existing data on radiation levels, as well as simulations that calculated radiation doses using child-sized "phantoms," or models to estimate radiation exposure.

The researchers found that most children had low exposure to radiation, amounting to less than the annual background exposure in the United States. However, certain groups of children, particularly those with more complex heart disease, were exposed to higher cumulative doses from repeated tests and high-exposure imaging.

Abdominal and chest X-rays accounted for 92 percent of the imaging tests, but only 19 percent of the radiation exposure. Advanced imaging (CT and catheterization) made up only 8 percent of imaging tests performed, but accounted for 81 percent of radiation exposure.

The researchers estimated the average increase in lifetime cancer risk to be 0.07 percent, with the risk increase ranging from 0.002 percent for chest X-rays to 0.4 percent for complex imaging.

"Clinicians need to weigh the risks and benefits of different imaging studies, including those with higher radiation exposure," Hill said. "We're not proposing eliminating complex imaging in fact, they're critically important to patients but we can make significant improvements by prioritizing tests and simply recognizing the importance of reducing radiation exposure in children."

The researchers also noted that lifetime cancer risk was increased among girls and children who had imaging tests done at very young ages. Girls had double the cancer risk of boys because of their increased chances of developing breast and thyroid cancers.


'/>"/>

Contact: Rachel Harrison
rachel.harrison@duke.edu
919-419-5069
Duke University Medical Center
Source:Eurekalert

Related medicine news :

1. Dr. Arthur Slutsky, vice-president of research at St. Michaels, receives lifetime award
2. Gladstones Lennart Mucke receives Lifetime Achievement Award from the Alzheimers Association
3. Men Have a Greater Lifetime Risk for Kidney Failure: Study
4. James George, MD: 2012 ASH Wallace H. Coulter Award for Lifetime Achievement in Hematology
5. What babies eat after birth likely determines lifetime risk of obesity, rat study suggests
6. Penn Medicine expert wins AHAs Lifetime Achievement Award in Cardiac Resuscitation Science
7. Travel Services MyTSOnline Celebrates the Holidays by Extending Lifetime Memberships and Poking Fun at the Mayan End of World Prediction
8. Lifetime of Speaking a 2nd Language May Boost Aging Brain
9. A Mental and Physical Training Experience of a Lifetime (SEALFIT)
10. University of Houston psychology professor honored with Lifetime Distinguished Career Award
11. Engagement is Key for Lifetime Clients
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/18/2017)... ... February 18, 2017 , ... ... Pixel Film Studios ’ ProParagraph Fashion Volume 2 for all multi-line FCPX ... applications. Users can pick and choose from hand-crafted trend-setting designs with smooth ...
(Date:2/17/2017)... ... February 17, 2017 , ... The Alliance Healthcare Foundation (AHF) ... further positively impact the health and wellness of our community in San Diego ... duty to seriously consider releasing our assets beyond our 5% targeted distribution each ...
(Date:2/17/2017)... , ... February 17, 2017 , ... ... Dr. Carol Francis' goals for each and every seminar, session and ... Francis will demonstrate five different brainwave tools which help energize creativity, focus mental ...
(Date:2/17/2017)... ... February 17, 2017 , ... Program ... , Trinity Health and the U.S. Soccer Foundation announced today that they have ... communities. Soccer for Success, the Foundation’s soccer mentoring program, teaches kids the fundamentals ...
(Date:2/17/2017)... ... February 17, 2017 , ... Cancer ... Molecular Medicine Tri-Conference February 20 – 22 in San Francisco. As part of ... anatomic and molecular pathology workflow solution, as well as its new precision medicine ...
Breaking Medicine News(10 mins):
(Date:2/17/2017)... Cryoablation, Electrical, Endometrial Hydrothermal, Laser/Light, Microwave, Radiofrequency, ... technologies market is expected to grow at a CAGR of 9.4% ... expected to grow at a CAGR of 9.5% from 2017 to ... in 2026. ... this report will benefit you Read on to discover how ...
(Date:2/17/2017)... (NYSE, TASE: PRGO) today announced it has received final approval ... and homatropine methylbromide oral solution (syrup), 5 mg/1.5 mg per ... oral solution (syrup), 5 mg/1.5 mg per 5 mL is ... children 6 years of age and older. Annual sales for ...   ...
(Date:2/17/2017)... ST. LOUIS , Feb. 17, 2017   ... hospitals, has announced a new partnership with Engage ... the United States . FormFast will serve ... part of Engage,s implementations with MEDITECH .  ... that provides essential functionality to complement and enhance the ...
Breaking Medicine Technology: