Navigation Links
Radiation dose level affects size of lesions seen on chest CT images
Date:4/16/2013

The estimated size of chest lymph nodes and lung nodules seen on CT images varies significantly when the same nodes or nodules are examined using lower versus higher doses of radiation, a new study shows. The size of lymph nodes and lung nodules is an important determinant of treatment and treatment success.

The study, conducted at Massachusetts General Hospital in Boston, used a 3D image processing tool to quantitatively measure the volume of the lymph nodes and lung nodules. "We found that lymph node volumes were estimated at 30% lower in five cases and 10% higher in 15 cases of low dose compared to higher dose images," said Dr. Beth Vettiyil, a lead author of the study. The study found that the calculated volume of lung nodules was 46% lower in nine cases and 34% higher in 10 cases on lower dose as compared to high dose images.

"We were surprised that in both the lymph nodes and lung nodules there were cases in which the lower dose picked up lower lesion volumes as well as higher lesion volumes when compared to the higher dose scans," said Dr. Vettiyil. "We think that increased image noise (graininess of the image) on the lower dose scans may have caused the lesion volumes to vary so significantly," she said.

The goal of the study was to explore the possibility of using image processing tools to better delineate lesions at low radiation doses without missing any clinical information, noted Dr. Vettiyil. "The study indicates that radiologists can use these types of quantitative tools to supplement them in their measurements, but the use of such software measurements without the radiologist's clinical correlation might not be advisable at this stage," said Dr. Vettiyil.

The study will be presented April 17 during the ARRS Annual Meeting in Washington, DC.


'/>"/>

Contact: Samantha Schmidt
sschmidt@arrs.org
703-858-4316
American Roentgen Ray Society
Source:Eurekalert

Page: 1

Related medicine news :

1. Antibody therapy prevents gastrointestinal damage following radiation exposure in mice
2. Diagnostic Scans Tied to Radiation Risk for Gastro Patients
3. CT Scans Deliver More Radiation to Obese People: Study
4. Intensity Modulated Radiation Therapy optimal for localized prostate cancer
5. Study examines adverse effects among different radiation therapies for prostate cancer
6. Chemo + Radiation Best for Bladder Cancer, Study Finds
7. Use of dedicated pediatric imaging departments for pediatric CT reduces radiation dose
8. APBI associated with more mastectomies, toxicities, complications, compared to traditional radiation
9. Cone beam CT proves better for visualizing some causes of hearing loss at half the radiation dose
10. Highly targeted irradiation as good as whole breast radiotherapy in early stage cancer
11. Novel biomarkers reveal evidence of radiation exposure
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/22/2017)... CA (PRWEB) , ... September 22, 2017 , ... ... to help you brush more effectively even on the go. Their electric toothbrushes ... gingivitis and gum inflammation, with UV sanitizing technology. Combining leading edge Enke technology ...
(Date:9/22/2017)... ... September 22, 2017 , ... Global Lyme Alliance ... research, education and awareness, today announced the appointment of Timothy J. Sellati, Ph.D. ... Sellati has more than 20 years of research experience with Lyme and other ...
(Date:9/21/2017)... ... 21, 2017 , ... The American Addiction Treatment Association (AATA) ... in the addiction treatment industry entitled: Special Investigations Unit (SIU) – What ... state and federal governments are increasingly scrutinizing the addiction treatment industry for fraudulent ...
(Date:9/21/2017)... ... , ... In addition to sticking with the new years ... and use natural alternatives for all house cleaning products, disinfectants, respiratory relief, and ... the new line of essential oils, are all 100% organic and natural. , ...
(Date:9/21/2017)... RICHMOND, Va. (PRWEB) , ... September 21, 2017 ... ... Richmond with a different approach to addiction recovery at a time when Virginia ... 1,420 deaths resulting from drug overdose, a staggering increase of 38 percent from ...
Breaking Medicine News(10 mins):
(Date:9/6/2017)...  Medical professionals are expected to continuously ... their patients. Medical simulations offer clinicians the ... Simulation provides a safe method for teaching ... refine techniques and build confidence, without putting ... such as augmented reality, will now provide ...
(Date:9/5/2017)... 5, 2017  Xyntek Inc. has announced another milestone in their continued growth ... to meet the growing demands of customer engagements regionally.  ... Xyntek's new Midwest office is located at 318 West Adams Street, Suite ... Xyntek's ... ...
(Date:9/1/2017)... , Sept. 1, 2017  Explorers Like Us ( https://explorerslikeus.com/ ... greatest aural experiences — and deliver these experiences as part ... help people feel and heal better. ... While nothing beats a walk, jog ... your mind, Life Environments™ is the next best thing when ...
Breaking Medicine Technology: