Press Esc to close
Tuesday 07 July 2015
News updated at 2:52 AM IST
Weather
Max: 33°C
Min : 20°C
In Bengaluru
Partially 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
'Umbrella Workshop' where people paint umbrellas with colors in Navi Mumbai...

'Umbrella Workshop' where people paint umbrellas with colors in Navi Mumbai...

Visitors looking the BSF weapons on the occasion of the 50th anniversary of the BSF...

Visitors looking the BSF weapons on the occasion of the 50th anniversary of the BSF...

Mobile app ' Namma Bellad' launched in Bengaluru...

Mobile app ' Namma Bellad' launched in Bengaluru...

Sadhvi Niranjan Jyoti feeds cows during her visit to Gir Seva Goshala in Ahmedabad...

Sadhvi Niranjan Jyoti feeds cows during her visit to Gir Seva Goshala in Ahmedabad...

An highly decorated Vruksha hall during the 'BJP Maha Samparka Abhiyan 2015'...

An highly decorated Vruksha hall during the 'BJP Maha Samparka Abhiyan 2015'...

A fire broke out at Sony manufacturing plant in Navi Mumbai on Sunday...

A fire broke out at Sony manufacturing plant in Navi Mumbai on Sunday...

Pilgrims crosses the mountains as they move towards Amarnath Holy Cave Shrine...

Pilgrims crosses the mountains as they move towards Amarnath Holy Cave Shrine...

A Kashmiri Muslim woman offers noon prayers in the ruins of an ancient Hindu temple...

A Kashmiri Muslim woman offers noon prayers in the ruins of an ancient Hindu temple...

A security man keeps vigil on the mountains near Amarnath Holy Cave Shrine 3880 meters high...

A security man keeps vigil on the mountains near Amarnath Holy Cave Shrine 3880 meters high...

An Indian boy practices Mallakhamb, a traditional Indian gymnastic sport...

An Indian boy practices Mallakhamb, a traditional Indian gymnastic sport...

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