Navigation Links
CT Scans Deliver More Radiation to Obese People: Study
Date:4/13/2012

By Randy Dotinga
HealthDay Reporter

FRIDAY, April 13 (HealthDay News) -- Obese and overweight patients who undergo CT scans are exposed to much more radiation than people of normal weight, researchers say.

The challenge for heavier people is that more radiation is needed to scan their bodies, a radiation specialist said.

"One has to customize the dose based on patient size, increase the power of the X-rays and the quantity that are going inside," said Dr. Dushyant Sahani, director of CT imaging services at Massachusetts General Hospital and an associate professor of radiology at Harvard Medical School.

Nearly 60 percent of U.S. adults are overweight or obese, according to the study. As obesity-related health challenges surface, so do orders for medical scans, the authors said. Because radiation can cause cancer and other ill effects, researchers have been concerned about the risks of exposure derived from medical imaging.

However, Sahani, who was not involved in the study, said the excess body fat of extra-large patients absorbs much of the radiation, meaning that they may face no extra danger.

"Fat is not as sensitive to undergoing any bad changes as the other tissues," said Sahani.

Even if an obese patient gets twice the radiation as a smaller person of the same age, the risk of radiation damage would be higher for the smaller person, he said.

The study authors, all from the Rensselaer Polytechnic Institute in Troy, N.Y., launched their research to better understand how radiation in CT scans affect the bodies of heavier people. Statistics about their radiation haven't been previously available, the study authors said. "We want to fill this gap," said study lead author Aiping Ding, a research associate at the institute.

CT scans are used to create images that divide the body's organs into sections, or slices. Sahani said, "They produce a detailed anatomic picture, as if someone's body has been actually sliced."

In the new study, the researchers created 10 computerized male and female "phantoms" that represented people of various body types, ranging from normal to morbidly obese. (Previous research using phantoms had mostly looked at average-sized people).

The researchers then calculated how much radiation would enter the bodies during CT scans. In some cases, the dose that reached organs was as much as 57 percent higher in the obese patients.

"We want to tell people that obese patients receive high doses and that we can use our phantom to quantify the specific dose for the patient," Ding said. "Our study can be a good reference for radiologists."

What should patients do with this information? Ding suggests that they ask their radiologist about the risk they face when they undergo a CT scan. Patients are at especially high risk at hospitals that take multiple CT scans of individual patients in a day, Ding said.

The study appeared recently in the journal Physics in Medicine & Biology.

More information

For more about obesity, visit the U.S. National Library of Medicine.

SOURCES: Dushyant Sahani, M.D., director of CT imaging services, Massachusetts General Hospital, and associate professor of radiology, Harvard Medical School, Boston; Aiping Ding, Ph.D., research associate, Rensselaer Polytechnic Institute, Troy, N.Y.; April 6, 2012, Physics in Medicine & Biology


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Diagnostic Scans Tied to Radiation Risk for Gastro Patients
2. CT Scans Can Spot Heart Trouble Fast
3. Brain Scans Suggest How Alzheimers Spreads
4. Brain Scans Overused on U.S. Stroke Patients, Study Says
5. Whole-Body CT Scans Can Miss Traumatic Injuries: Study
6. Brain Scans May One Day Be Used to Predict Dementia
7. Treatment for hip conditions should not rest solely on MRI scans
8. CT scans for dizziness in the ER: Worth the cost?
9. Routine follow-up scans can detect head and neck cancer recurrences earlier
10. Repeat Scans Urged for Head Injury When Blood Thinners Involved
11. Paranoid or Placid? Scans Show Pots Effect on Brain
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
CT Scans Deliver More Radiation to Obese People: Study 
(Date:5/24/2017)... ... May 24, 2017 , ... Dr. Manju R. Kejriwal, ... ClearCorrect orthodontics, with or without a referral. Dr. Kejriwal understands the emotional and ... convenient, clear braces in Cincinnati, OH. Patients no longer need to feel the esthetic ...
(Date:5/24/2017)... ... May 24, 2017 , ... ... II of the HP3 (High-Performance Periodontal Practice) continuing education (CE) series. As a ... advancements in his field by attending numerous CE courses each year. His recent ...
(Date:5/24/2017)... ... 2017 , ... If you are thinking of a visit to San Francisco , fall ... the perfect time to visit. , Business Architecture Associates is pleased to offer 5 days ... as a 4-½ day package for individuals, and as 4-½ day corporate package for up ...
(Date:5/24/2017)... ... May 24, 2017 , ... Fiberstar, ... solutions for the food and beverage industry offers Citri-Fi®, a natural citrus fiber, ... the purchasing decision process. As a result, labels need to deliver simple, transparent ...
(Date:5/23/2017)... ... ... Axiad IDS , a leading provider of trusted identities for enterprise, ... a “Top 25 Cybersecurity Companies 2017.” Axiad IDS received this honor in ... address potential cybersecurity threats before they happen. The annual list of top ...
Breaking Medicine News(10 mins):
(Date:5/15/2017)... , May 15, 2017 Enterin Inc., a ... and developing novel compounds to treat Parkinson,s disease (PD), ... study is a Phase 1/2a randomized, controlled, multicenter study involving ... It will enroll 50 patients over a 9-to-12-month period. The ... in 10 patients with PD. Participating sites include ...
(Date:5/10/2017)... , May 10, 2017 Global Health Intelligence ... Latin America , published its 2017 ranking of ... is based on extensive data analysis from GHI,s hospitals ... hospitals database for the region. The GHI database covers 86% ... offering more than 130 data points for each institution in ...
(Date:5/9/2017)... May 9, 2017 Zimmer Biomet Holdings, Inc. ... healthcare, today announced it has earned a spot on ... list. The Company was ranked among 500 U.S. employers ... and Healthcare Equipment and Services. The annual ... an anonymous, independent survey of over 30,000 employees across ...
Breaking Medicine Technology: