RSNA: Breast CA risk estimates up from repeated prior CT use

November 27, 2012
RSNA: breast CA risk estimates up from repeated prior CT use
The impact of different screening modalities on cancer risk has been quantified in two studies presented at the annual meeting of the Radiological Society of North America, held from Nov. 25 to 30 in Chicago.

(HealthDay)—The impact of different screening modalities on cancer risk has been quantified in two studies presented at the annual meeting of the Radiological Society of North America, held from Nov. 25 to 30 in Chicago.

Using data from 1,656 women enrolled in a large integrated health care system, Ginger Merry, M.D., M.P.H., from Northwestern Memorial Hospital in Chicago, and colleagues examined the impact of increased utilization of chest and cardiac computed tomography (CT) and nuclear medicine on and subsequent risk of breast cancer. The researchers found that there was a rapid increase in CT and nuclear medicine exam use between 2000 and 2010. CT breast doses were variable, with the highest dose delivered by multiple-phase cardiac and chest CT. The 10-year risk of developing breast cancer from these exams was increased for a child or young adult who underwent two cardiac or chest CTs before the age of 23.

Alison Chetlen, D.O., from the Penn State Hershey Medical Center, and colleagues quantified the scatter received by the , salivary gland, lens of eye, sternum, and uterus during screening . Data were collected from 100 women who wore six optically stimulated luminescent dosimeters. The researcher found that the measured skin dose was negligible at the bridge of the nose and umbilicus. The average skin doses to the sternum, right salivary gland, and right and left thyroid lobes were 1.1, 0.29, and 0.33 mGy, respectively.

"The risk of cancer induction at these low levels is indistinguishable from background incidence of cancer due to other sources," Chetlen said in a statement.

Explore further: Scatter radiation from mammography presents no cancer risk

More information: Press Release
Press Release
More Information

Related Stories

Scatter radiation from mammography presents no cancer risk

November 27, 2012
The radiation dose to areas of the body near the breast during mammography is negligible, or very low, and does not result in an increased risk of cancer, according to a study presented today at the annual meeting of the ...

Breast cancer risk estimates increased with repeated prior CT and nuclear imaging

November 27, 2012
Researchers reviewing the records of approximately 250,000 women enrolled in an integrated healthcare delivery system found that increased CT utilization between 2000 and 2010 could result in an increase in the risk of breast ...

Breast shields better at reducing dose than posteriorly centered partial CT, study finds

May 4, 2011
The use of breast shields is the technique of choice to protect the breasts of women from radiation exposure while undergoing chest CT examinations, according to a new study.

After chest radiation, girls at greater risk for early breast cancer: study

June 4, 2012
(HealthDay) -- Girls who receive radiation to the chest to treat childhood cancer, even those getting lower doses, have a high risk of developing breast cancer at a young age, according to a new study.

Recommended for you

Researchers discover novel mechanism linking changes in mitochondria to cancer cell death

February 20, 2018
To stop the spread of cancer, cancer cells must die. Unfortunately, many types of cancer cells seem to use innate mechanisms that block cancer cell death, therefore allowing the cancer to metastasize. While seeking to further ...

Stem cell vaccine immunizes lab mice against multiple cancers

February 15, 2018
Stanford University researchers report that injecting mice with inactivated induced pluripotent stem cells (iPSCs) launched a strong immune response against breast, lung, and skin cancers. The vaccine also prevented relapses ...

Induced pluripotent stem cells could serve as cancer vaccine, researchers say

February 15, 2018
Induced pluripotent stem cells, or iPS cells, are a keystone of regenerative medicine. Outside the body, they can be coaxed to become many different types of cells and tissues that can help repair damage due to trauma or ...

Team paves the way to the use of immunotherapy to treat aggressive colon tumors

February 15, 2018
In a short space of time, immunotherapy against cancer cells has become a powerful approach to treat cancers such as melanoma and lung cancer. However, to date, most colon tumours appeared to be unresponsive to this kind ...

Can our genes help predict how women respond to ovarian cancer treatment?

February 15, 2018
Research has identified gene variants that play a significant role in how women with ovarian cancer process chemotherapy.

First comparison of common breast cancer tests finds varied accuracy of predictions

February 15, 2018
Commercially-available prognostic breast cancer tests show significant variation in their abilities to predict disease recurrence, according to a study led by Queen Mary University of London of nearly 800 postmenopausal women.


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.