Featured Research

from universities, journals, and other organizations

The key to lower dose CT fluoroscopy for spine injections is reducing the dose of the planning CT

Date:
September 22, 2011
Source:
American Roentgen Ray Society
Summary:
The radiation dose for a CT fluoroscopy is about half that for conventional fluoroscopy to guide epidural steroid injections, however, the dose is substantially more than conventional fluoroscopy when a full lumbar planning CT scan is performed as part of the CT-guided procedure, a new study shows.

The radiation dose for a CT fluoroscopy is about half that for conventional fluoroscopy to guide epidural steroid injections, however, the dose is substantially more than conventional fluoroscopy when a full lumbar planning CT scan is performed as part of the CT-guided procedure, a new study shows.

Physicians may hesitate to use CT fluoroscopy because of concerns about radiation dose, said Jenny K. Hoang, MD of Duke University Medical Center, and one of the authors of the study. However, the study found that since CT fluoroscopy itself takes less time than conventional fluoroscopy (4.7 seconds versus 37 seconds on average), the radiation dose is actually much lower. The study found that absorbed radiation dose to the skin, small bowel, large bowel and bone marrow was greater for conventional fluoroscopy compared with CT fluoroscopy. However, when you combine the dose of the planning CT (scan range from L2 to S1) with that of the CT fluoroscopy itself, the dose is four times higher compared to conventional fluoroscopy, Dr. Hoang said.

"The main source of radiation dose from CT-guided lumbar pain injections is the lumbar spine preliminary planning CT," said Dr. Hoang. "Radiologists performing CT fluoroscopy should consider techniques to reduce radiation dose for the planning CT such as reducing the coverage to only areas of interest and reducing the tube current or peak kilovoltage. In this study we considered the maximum z-axis possible for the planning CT. In most cases this can be reduced to one intervertebral level if there is a good history that identifies the level affected and/or if there is prior diagnostic imaging," she said.

CT fluoroscopy has several advantages over conventional fluoroscopy, added Dr. Hoang. CT fluoroscopy is better able to show soft tissue so the needle can be more accurately positioned for the spine injection; in addition, less iodinated contrast media is needed, she said.

Dr. Hoang emphasized that the study results are based on the protocols they use at her institution. "Radiation dose values are highly dependent on the fluoroscopy time used by the individual doing the procedure and the dose settings that are used at his or her institution," she said.

The study is published in the October, 2011 American Journal of Roentgenology.


Story Source:

The above story is based on materials provided by American Roentgen Ray Society. Note: Materials may be edited for content and length.


Cite This Page:

American Roentgen Ray Society. "The key to lower dose CT fluoroscopy for spine injections is reducing the dose of the planning CT." ScienceDaily. ScienceDaily, 22 September 2011. <www.sciencedaily.com/releases/2011/09/110922114234.htm>.
American Roentgen Ray Society. (2011, September 22). The key to lower dose CT fluoroscopy for spine injections is reducing the dose of the planning CT. ScienceDaily. Retrieved September 21, 2014 from www.sciencedaily.com/releases/2011/09/110922114234.htm
American Roentgen Ray Society. "The key to lower dose CT fluoroscopy for spine injections is reducing the dose of the planning CT." ScienceDaily. www.sciencedaily.com/releases/2011/09/110922114234.htm (accessed September 21, 2014).

Share This



More Health & Medicine News

Sunday, September 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Sierra Leone in Lockdown to Control Ebola

Sierra Leone in Lockdown to Control Ebola

AP (Sep. 21, 2014) Sierra Leone residents remained in lockdown on Saturday as part of a massive effort to confine millions of people to their homes in a bid to stem the biggest Ebola outbreak in history. (Sept. 20) Video provided by AP
Powered by NewsLook.com
Sierra Leone's Nationwide Ebola Curfew Underway

Sierra Leone's Nationwide Ebola Curfew Underway

Newsy (Sep. 20, 2014) Sierra Leone is locked down as aid workers and volunteers look for new cases of Ebola. Video provided by Newsy
Powered by NewsLook.com
Changes Found In Brain After One Dose Of Antidepressants

Changes Found In Brain After One Dose Of Antidepressants

Newsy (Sep. 19, 2014) A study suggest antidepressants can kick in much sooner than previously thought. Video provided by Newsy
Powered by NewsLook.com
Could Grief Affect The Immune Systems Of Senior Citizens?

Could Grief Affect The Immune Systems Of Senior Citizens?

Newsy (Sep. 19, 2014) The study found elderly people are much more likely to become susceptible to infection than younger adults going though a similar situation. 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