Featured Research

from universities, journals, and other organizations

New technology reduces, controls CT radiation exposure in children: CT scan radiation reduced by 37 percent

Date:
June 19, 2013
Source:
Cincinnati Children's Hospital Medical Center
Summary:
Patients at certain hospitals are being exposed to significantly less radiation during CT scans because of new technology that allows doctors to more tightly control radiation doses. The first-of-its-kind imaging software reduced overall radiation exposure from CT scans by 37 percent.

Patient having a CT scan.
Credit: Tyler Olson / Fotolia

Patients at Cincinnati Children's Hospital Medical Center are being exposed to significantly less radiation during CT scans because of new technology that allows doctors to more tightly control radiation doses. The first-of-its-kind imaging software reduced overall radiation exposure from CT scans by 37 percent, according to two new studies published online today in the journal Radiology.

The imaging software -- developed and currently in use only at Cincinnati Children's -- mathematically determines the lowest possible radiation dose for the patient before a scan is performed, according to the study led by David Larson, MD, radiology quality and safety director at the medical center and principal architect of the technology.

Used with existing CT scanners, the new software allows radiologists to precisely control the amount of radiation based on the specific size of each patient, while still producing diagnostic-quality images. The software provides radiologists with the correct scanner settings before the CT scan is performed, and then monitors each scan slice-by-slice, to confirm that the right dose was used.

"Radiologists have had to rely on a trial-and-error approach to optimizing CT radiation dose. This model allows us to more accurately walk that fine line of precise dosing," said Dr. Larson. "Even though modern CT scanners adjust the dose based on the size of the patient, they do not necessarily adjust it to the exact image quality radiologists need. This way we can not only specify what image quality and dose are appropriate, but we can also predict the scanner settings needed to achieve those levels."

During the quality-improvement study involving more than 800 patients, Dr. Larson and his team asked radiologists to score CT images to determine an acceptable amount of "noise" -- or unwanted random signals.

"Image quality is what determines the appropriate radiation dose -- the challenge is to find the threshold where the dose is as low as possible, but the images are still clear," Larson added. "The right balance results in images that may be a little noisy but are good enough to provide an accurate diagnosis."

Larson believes the new system can have broad-scale impact on how CT scans are performed. He adds that though the approach was developed in pediatrics, it is also applicable for adults.

"Image quality depends on patient size, not patient age," Larson said. "58 percent of the examinations in our study were of adult-sized patients."

The use of CT scan imaging tests is of growing concern because the tests entail higher doses of radiation -- typically producing 500 times more radiation than x-rays.


Story Source:

The above story is based on materials provided by Cincinnati Children's Hospital Medical Center. Note: Materials may be edited for content and length.


Journal References:

  1. David B. Larson, Lily L. Wang, Daniel J. Podberesky, and Marilyn J. Goske. System for Verifiable CT Radiation Dose Optimization Based on Image Quality. Part I. Optimization Model. Radiology, June 19, 2013 DOI: 10.1148/radiol.13122320
  2. David B. Larson, Remo J. Malarik, Seth M. Hall, and Daniel J. Podberesky. System for Verifiable CT Radiation Dose Optimization Based on Image Quality. Part II. Process Control System. Radiology, June 19, 2013 DOI: 10.1148/radiol.13122321

Cite This Page:

Cincinnati Children's Hospital Medical Center. "New technology reduces, controls CT radiation exposure in children: CT scan radiation reduced by 37 percent." ScienceDaily. ScienceDaily, 19 June 2013. <www.sciencedaily.com/releases/2013/06/130619164752.htm>.
Cincinnati Children's Hospital Medical Center. (2013, June 19). New technology reduces, controls CT radiation exposure in children: CT scan radiation reduced by 37 percent. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2013/06/130619164752.htm
Cincinnati Children's Hospital Medical Center. "New technology reduces, controls CT radiation exposure in children: CT scan radiation reduced by 37 percent." ScienceDaily. www.sciencedaily.com/releases/2013/06/130619164752.htm (accessed July 31, 2014).

Share This




More Health & Medicine News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Health Insurers' Profits Slide

Health Insurers' Profits Slide

Reuters - Business Video Online (July 30, 2014) Obamacare-related costs were said to be behind the profit plunge at Wellpoint and Humana, but Wellpoint sees the new exchanges boosting its earnings for the full year. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Concern Grows Over Worsening Ebola Crisis

Concern Grows Over Worsening Ebola Crisis

AFP (July 30, 2014) Pan-African airline ASKY has suspended all flights to and from the capitals of Liberia and Sierra Leone amid the worsening Ebola health crisis, which has so far caused 672 deaths in Guinea, Liberia and Sierra Leone. Duration: 00:43 Video provided by AFP
Powered by NewsLook.com
At Least 20 Chikungunya Cases in New Jersey

At Least 20 Chikungunya Cases in New Jersey

AP (July 30, 2014) At least 20 New Jersey residents have tested positive for chikungunya, a mosquito-borne virus that has spread through the Caribbean. (July 30) Video provided by AP
Powered by NewsLook.com
Xtreme Eating: Your Daily Caloric Intake All On One Plate

Xtreme Eating: Your Daily Caloric Intake All On One Plate

Newsy (July 30, 2014) The Center for Science in the Public Interest released its 2014 list of single meals with whopping calorie counts. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



      Save/Print:
      Share:

      Free Subscriptions


      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      Get Social & Mobile


      Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

      Have Feedback?


      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
      Mobile: iPhone Android Web
      Follow: Facebook Twitter Google+
      Subscribe: RSS Feeds Email Newsletters
      Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins