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:1/23/2017)... ... January 23, 2017 , ... DMG Productions is proud to ... Jr., scheduled to broadcast Saturday, January 28, 2017 at 5:00pmEST. , This segment ... to address the limitations of fatigue monitoring technologies within the mining industry. Today ...
(Date:1/23/2017)... ... January 23, 2017 , ... ... taught by healthcare management and evaluation leaders with decades of experience who remain ... in the United States healthcare system, there is a renewed demand for versatile, ...
(Date:1/23/2017)... Indiana (PRWEB) , ... January 23, 2017 , ... ... Center for Assisted Living (IHCA/INCAL), will serve as a healthcare industry expert at ... 23. The panel discussion, moderated by Inside Indiana Business host Gerry Dick, will ...
(Date:1/23/2017)... ... 23, 2017 , ... Steviva Ingredients, makers of all-natural sweeteners ... National Organic Program (NOP) for its Portland SQF Level 2 manufacturing facility. ... handling systems to complement our current rigorous food-safety management systems,” said Yishu Hou, ...
(Date:1/23/2017)... ... January 23, 2017 , ... ... partnership with the American Society of Anesthesiologists® (ASA®), the Foundation for Anesthesia ... Academy of Orthopaedic Surgeons (AAOS) and the Cigna Foundation, encourages proposals supporting ...
Breaking Medicine News(10 mins):
(Date:1/21/2017)... Jan. 20, 2017 ResMed (NYSE: RMD ), ... Winter Haven, Florida ) today announced they have agreed ... and 3B will be permitted to sell their existing products in ... one-time settlement payment to 3B to close the Florida ... include an admission of liability or wrongdoing by any party. ...
(Date:1/21/2017)... Jan. 20, 2017  Faruqi & Faruqi, LLP, a leading ... or the "Company") (NASDAQ: KMPH ) of the ... certain officers and directors and underwriters of the Company,s April ... role of lead plaintiff. The lawsuit has been ... for Johnson County on behalf of ...
(Date:1/20/2017)... Research and Markets has announced the addition of the ... to their offering. ... This research service on the global pharmaceutical stability testing market ... of the key participants in the market. The ... 2020. The market is expected to grow at a CAGR of ...
Breaking Medicine Technology: