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:3/24/2017)... ... March 24, 2017 , ... Empower Brokerage, ... their training and leads programs. , In February, 2017, Empower Brokerage introduced their ... Performance Partners is designed to teach how to maximize their sales efforts, as ...
(Date:3/24/2017)... ... March 24, 2017 , ... “Finding Christ Through Social Media: ... journal chronicling the writer’s path toward true communion with God. “Finding Christ Through ... is the creation of published author Lea Michelle Johnson, a follower of Christ, ...
(Date:3/24/2017)... (PRWEB) , ... March 24, 2017 , ... “Vintage and ... a retired minister and college Bible teacher residing in North Carolina with his wife, ... who have blessed them with six grandchildren. David is also the author of “Shadow ...
(Date:3/24/2017)... ... ... “The Adventures of Joey, The Dog Who Barks at Puddles”: a boisterous story ... fullest, as God intended. “The Adventures of Joey, The Dog Who Barks at Puddles” ... passion for writing, especially about truth and human behavior. , Published by Christian Faith ...
(Date:3/23/2017)... ... ... A recent report from the National Council on Teacher Quality (NCTQ) advocates for ... on a review of GPA and SAT/ACT requirements at 221 institutions in 25 states, ... that this higher bar should be set by states, by the Council for the ...
Breaking Medicine News(10 mins):
(Date:3/23/2017)... , Mar 23, 2017 Research and ... Analysis & Trends - Industry Forecast to 2025" report to ... ... of around 6.9% over the next decade to reach approximately $3.5 ... estimates and forecasts for all the given segments on global as ...
(Date:3/23/2017)... , March 23, 2017 The ... ageing population, increasing diabetic population, accelerating economic growth and increasing ... this industry are higher life expectancy of ESRD patients, rising ... emerging markets. However, the expansion of the market is hindered ... ...
(Date:3/23/2017)... , March 23, 2017  Transportation Insight, a multi-modal ... end-to-end supply chain management firm with expertise serving clients ... Solutions Rick Zaffarano was named a 2017 ... Supply Chain by the only publication exclusively dedicated to ... supply chain. "Rick has brought to Transportation ...
Breaking Medicine Technology: