More Evidence CT Scans Increase Brain Cancer Risk


Published:

More evidence from a new study in the Journal of the National Cancer Institute that CT scans increase the risk of brain tumors.

The use of computed tomography (CT) scans has increased dramatically over the last two decades and Radiation-induced cancers have tripled in that time. Diagnostic imaging has been already been admitted as a cause by the U.S. government.

CT scans deliver higher radiation doses than other tests. Therefore, radiation protection is a concern, especially among children, who may receive higher radiation doses, are more susceptible to radiation-related malignancies than adults and have more time to show effects from the potential risk.

The increased use of CT in pediatrics, combined with the wide variability in radiation doses, has resulted in many children receiving a high-dose examinations. The Food and Drug Administration (FDA) has warned radiologists in the past that the scan expose children to doses of radiation far greater than is safe for their age and weight -- by some estimates, up to six times more than what is needed to produce clear images.

The most common malignancies caused by radioactivity among children and young adults are leukemia and brain tumors. Researchers therefore evaluated leukemia and brain tumor risks following exposure to radiation from CT scans in childhood.

The reason is children are much more sensitive to radiation because of the way their cells divide. Their DNA is much more susceptible to damage. While the risk of an adult developing cancer from a CT scan is about 1 in 2000, for a child the risk goes up to 1 in 500. Compounding the problem, it’s not always easy to tell when a CT scan’s levels are in the danger zone.

Researchers at the National Cancer Institute estimate that 29,000 future cancer cases could be attributed to the millions of CT scans performed. That increase is linked to a growing percentage of cancers diagnosed nationwide every year. A 2009 study of medical centers in the San Francisco Bay Area also calculated an elevated risk: one extra case of cancer for every 400 to 2,000 routine chest CT exams.

The average yearly environmental exposure to radiation is approximately 3000mSv. One CT scan of the abdomen is equal to 15,000mSv. That’s 5 times the yearly dose of exposure in one sitting.

Radiation doses of more than 5000 mrem/year are considered unsafe, regardless of source. You can use our radiation dose calculator to measure the amounts you are exposed to yearly.

The projected lifetime attributable risks of solid cancer are higher for younger patients and girls than for older patients and boy. The risks are also higher for patients who underwent CT scans of the abdomen/pelvis or spine than for patients who underwent other types of CT scans.

For a nationwide group of 168,394 Dutch children who received one or more CT scans between 1979 and 2012, researchers obtained cancer incidence and vital status by record linkage. They surveyed all Dutch hospital-based radiology departments to ascertain eligibility and participation. In the Netherlands, pediatric CT scans are only performed in hospitals.

Overall cancer incidence was 1.5 times higher than expected. For all brain tumors combined, and for malignant and nonmalignant brain tumors separately, dose-response relationships were observed with radiation dose to the brain. Relative risks increased to between two and four for the highest dose category. The researchers observed no association for leukemia. Radiation doses to the bone marrow, where leukemia originates, were low.

The researchers caution that this pattern of excess cancer risk may be partly due to confounding by indication, because the incidence of brain tumors was higher in the cohort than in the general population. CT scans are sometimes used to identify conditions associated with an increased tumor risk; the reason these children had CT scans may be associated with their risk of developing cancer.

“Epidemiological studies of cancer risks from low doses of medical radiation are challenging,” said the study’s principal investigator, Michael Hauptmann. “Nevertheless, our careful evaluation of the data and evidence from other studies indicate that CT-related radiation exposure increases brain tumor risk. Careful justification of pediatric CT scans and dose optimization, as done in many hospitals, are essential to minimize risks.”

This article was republished from Prevent Disease.

See also:
10 Unneeded Healthcare Treatments
Breast Cancer Screening Without Radiation

Edit Module
Edit ModuleShow Tags
Edit Module Edit ModuleShow Tags

Daily Astrology

August 17, 2018

The waxing Scorpio Moon makes a nifty series of supportive aspects. The early morning is especially inspiring. A lunar conjunction with Jupiter fosters self-assurance, optimism and faith in others. Both stars are in a favorable trine to mystical Neptune…
Edit ModuleShow Tags

Alternative Health Directory

Browse all listings »

Edit ModuleShow Tags
Edit ModuleShow Tags

Calendar

August 2018

A fantastic shopping and educational experience for the whole family! Vendors come from New England, across the US, and many foreign countries to exhibit minerals, fossils, gemstones, jewelry,...

Cost: $8 adults, under 13 free

Where:
Eastern States Exposition
1305 Memorial Ave.
West Springfield, MA  01089
View map »


Sponsor: LLD Productions, Inc.
Telephone: 505-867-0425
Contact Name: Regina Aumente
Website »

More information

Readings, healings, vendors, presentations.

Cost: Free

Where:
Hilton Garden Inn
85 Glastonbury Blvd.
South Glastonbury, CT  06066
View map »


Website »

More information

During the weekend of August 10-12, 2018 we will gather again at Hampshire College in Amherst, Massachusetts for the 44th Annual NOFA SC. This immersive annual gathering is an opportunity to come...

Cost: See website

Where:
Hampshire College
Amherst, MA


Sponsor: Northeast Organic Farming Association
Telephone: 774-262-7986
Contact Name: Marjorie Bailey
Website »

More information

Show More...
Show Less...

August 13 - 17, 9am - 1pm Instructor: Peyton Pugmire For student entering grades 6-8 iPhones are amazing, but you know what’s even more amazing? You! During this imaginative week...

Cost: $250

Where:
Creative Spirit
80 Washington Street
Marblehead, MA  01945
View map »


Sponsor: Creative Spirit
Telephone: 781-797-0389
Website »

More information

August 13 - 16 Juan Li has been teaching Daoist energy practices for the last 27 years. He has created a sequence of practices based on the I Ching, adapted to the emotional and mental...

Cost: $950 single retreat; $1650 for both retreats (8/16)

Where:
Angels’ Rest Retreat
63 North County Road
Leyden, MA  01337
View map »


Sponsor: Tao Retreats
Telephone: 212-243-6771
Contact Name: Sharon Smith
Website »

More information

August 13 - 14 This fun and exciting healing workshop guarantees you valuable knowledge and powerful skills to keep you in a higher vibration of energy and flowing with infinite intelligence and...

Where:
Royal Plaza Best Western
Marlborough, MA


Sponsor: Geozuwa
Telephone: 646-606-9935
Website »

More information

August 13 - 21 With NLP training and master healer certification. This course is specifically designed for healers of every modality. For information call (646) 606-9935 or visit...

Where:
Marlboro, MA


Telephone: 646-606-9935
Website »

More information

Show More...
Show Less...

August 14 - 24 For millennia people have entered the wilderness to encounter Spirit and seek their direction, purpose, or medicine. If you are seeking guidance and renewal, or you’re...

Cost: $1295

Where:
Somerset Lake
P.O. Box 48
Putney, VT  05346
View map »


Sponsor: Circles of Air and Stone
Telephone: 802-387-6624
Contact Name: Sparrow Hart
Website »

More information

What better way to end a busy day than with a little bliss. We'll support your body right where it is today and help you to open your spine to find more movement and flexibility. Begin and end...

Cost: $18

Where:
Body Love Wellness Center
484 Bedford St
East Bridgewater, MA  02333
View map »


Sponsor: Bliss Through Yoga
Telephone: 508-331-3564
Contact Name: Janice
Website »

More information

Show More...
Show Less...

Yoga is an ancient behavioral practice that allows for the development and enhancement of mind-body skills and behavioral factors including physical functioning, self-regulation of internal...

Cost: Free

Where:
CIC Cambridge
One Broadway
Charles Conference Room, 14th Floor
Cambridge, MA  02142
View map »


Sponsor: CIC Wellness
Telephone: 617-953-0674
Contact Name: Shakti Rowan
Website »

More information

Barbara Macias will present an information workshop on the benefits of essential oils. A demonstration of the oils will be included. Please RSVP at katboston@comcast.net

Cost: Free

Where:
NBA Business Center
145 Washington Street
Route 53
Norwell, MA  02061
View map »


Sponsor: Mind Balance Hypnosis
Telephone: 339-788-1193
Contact Name: Kathryn Caruso

More information

Relax and restore this summer with free outdoor yoga classes on historic Rogers Field! We’re packing the lawn with yogis of all levels for yoga led by experienced practitioners from Dragonfly...

Cost: Free

Where:
Rogers Field
Devens, MA


Sponsor: Dragonfly Wellness Center
Telephone: 978-487-7181
Contact Name: Anne Ferguson
Website »

More information

Show More...
Show Less...

August 16 - 19 Magnetic-harmonic vibrational therapist, Jay Emmanuel, A.K., N.S.,V.M. shares powerful energy techniques that use the forces of sounds produced by the human voice in combination...

Cost: Please see our website

Where:
Eastover Estate & Retreat Center
430 East St.
Lenox, MA  01240
View map »


Telephone: 866-264-5139
Contact Name: Yingxing Wang
Website »

More information

August 16 - 19 Juan Li has been teaching Daoist energy practices for the last 27 years. He has created a sequence of practices based on the I Ching, adapted to the emotional and mental...

Cost: $950 single retreat; $1650 for both retreats (8/13)

Where:
Angels’ Rest Retreat
63 North County Road
Leyden, MA  01337
View map »


Sponsor: Tao Retreats
Telephone: 212-243-6771
Contact Name: Sharon Smith
Website »

More information

Daily practice for peace, healing, Christ mindedness, meditation, awakening.

Where:
Milton, MA


Telephone: 617-696-5685
Website »

More information

Show More...
Show Less...

With June Edward, “The Massachusette Medium” This is a mediumship gallery with June Edward, the “Massachusetts Medium!” Have you ever wanted to talk to someone on the...

Cost: $55 on Eventbrite, $60 at door

Where:
Plymouth Lodge AF & AM
116 S Meadow Rd
Plymouth, MA  02360
View map »


Sponsor: June Edward “The Massachusetts Medium”
Telephone: 508-259-1231
Contact Name: June Edward
Website »

More information

Show More...
Show Less...

Guide: Peyton Pugmire Ages 16+ Like meditating with a paintbrush! Escape your stress and routine and re-connect with yourself, your heart and soul - one brushstroke at a time. This fun...

Cost: $85 (includes cost of all supplies)

Where:
Creative Spirit
80 Washington Street
Marblehead, MA  01945
View map »


Telephone: 781-797-0389
Contact Name: Peyton Pugmire
Website »

More information

Show More...
Show Less...
Edit ModuleShow Tags
Edit Module Edit ModuleShow Tags