Press Esc to close
Saturday 23 July 2016
News updated at 8:25 PM IST
Weather
Max: 24.5°C
Min : 19.5°C
In Bengaluru
Generally cloudy

CT scans in childhood increase cancer risk

Paris, Jun 6, 2012, AFP:

Children exposed to multiple CT scans could be up to three times likelier to contract cancer of the blood, brain or bone marrow later in life, according to research published on Wednesday.

Writing in The Lancet medical journal, a team of scientists in Canada, Britain and the United States said the cancer risk, in absolute terms, appears to be small.

But they appealed for radiation doses from CT scans to be kept at a minimum and for alternatives to be used where appropriate. The researchers claimed their study was the first to provide direct evidence of a link between exposure from CT radiation in childhood and later cancer risk.

“Of utmost importance is that where CT is used, it is only used where fully justified from a clinical perspective,” said lead author Mark Pearce of Newcastle University’s Institute of Health and Society.

As a vital diagnostic technique, use of the CT scan has increased rapidly in the past 10 years, particularly in the United States, the researchers said.

“However, potential cancer risks exist due to the ionising radiation used in CT scans, especially in children who are more radiosensitive than adults.”

Computerised tomography — commonly known as CT — is an X-ray technique that produces images of the body’s internal structures in cross sections.

The researchers studied nearly 180,000 people who underwent a CT scan as children or young adults (under 22) in Britain between 1985 and 2002.

Of these, 74 were subsequently diagnosed with leukaemia and 135 with brain  cancer according to data for the period 1985 to 2008.

The team calculated that compared to patients who received a radiation dose of less than five milli-Grays (mGy), those who were given a cumulative dose of 30 mGy had about three times the risk of developing leukaemia (cancer of the blood or marrow) later in life. Those who received 50 to 74 mGy had thrice the risk of brain tumours.

The study did not compare children who had been scanned against those who had not been scanned.

Put into context, this means that among every 10,000 patients who received one CT scan before the age of 10, there would be one extra case of leukaemia and one extra brain tumour per 10 mGy of radiation in the 10 years after exposure.

“Further refinements to allow reduction in CT doses should be a priority, not only for the radiology community, but also for manufacturers,” said Pearce.


Go to Top

Photo Gallery
Prime Minister Narendra Modi interacting with the children at the launch of the Reliance...

Prime Minister Narendra Modi interacting with the children at the launch of the Reliance...

Flamingos fly over Chandlai Lake in Jaipur on Saturday. Flamingos travel thousands of miles...

Flamingos fly over Chandlai Lake in Jaipur on Saturday. Flamingos travel thousands of miles...

Director Porsche India oavan Shetty with new Porsche 911 car during the launch in Bengaluru...

Director Porsche India oavan Shetty with new Porsche 911 car during the launch in Bengaluru...

Women on a boat wade through flooded area after heavy showers in Mayong village in Morigoan...

Women on a boat wade through flooded area after heavy showers in Mayong village in Morigoan...

Kite club India fly's 300 kite during Kite festival 2016 as the part of Income Declaration...

Kite club India fly's 300 kite during Kite festival 2016 as the part of Income Declaration...

Villagers along with their cattle wade through a Banana raft from the flood affected village...

Villagers along with their cattle wade through a Banana raft from the flood affected village...

A fan sports painting Rajinikanth's Kabali on his body at the release of his new film 'Kabali' ...

A fan sports painting Rajinikanth's Kabali on his body at the release of his new film 'Kabali' ...

A Peacock at the Zoo in Surat, Gujarat on Friday...

A Peacock at the Zoo in Surat, Gujarat on Friday...

Women Congress members holding a protest over women's safety issue outside Delhi CM Arvind...

Women Congress members holding a protest over women's safety issue outside Delhi CM Arvind...

A Security jawan guards in a street during curfew and strike in Srinagar for the 14th consecutive..

A Security jawan guards in a street during curfew and strike in Srinagar for the 14th consecutive..

Copyright 2014, The Printers (Mysore) Private Ltd., 75, M.G Road, Post Box 5331, Bengaluru - 560001
Tel: +91 (80) 25880000 Fax No. +91 (80) 25880523