Positioning During Cancer Radiation May Be Key to Heart Risks

Positioning During Cancer Radiation May Be Key to Heart Risks

If you have lung or throat cancer, exactly how you are positioned during your radiation treatments may alter your chances of beating the disease.

Mental Health Does Not Come With A Manual, It Comes With Friends & Family Support That Never Gives Up!
Join now

New research suggests that even tiny shifts can mean the radiation may harm organs around tumors in the chest, most notably the heart.

"We already know that using imaging can help us to target cancers much more precisely and make radiotherapy treatment more effective," said researcher Corinne Johnson, a Ph.D. student at the Manchester Cancer Research Center in England.

"This study examines how small differences in how a patient is lying can affect survival, even when an imaging protocol is used," Johnson explained. "It tells us that even very small remaining errors can have a major impact on patients' survival chances, particularly when tumors are close to a vital organ like the heart."

When cancer specialists prepare to perform radiation therapy, they scan the patient's body to determine the exact position and size of the tumor, the researchers explained. Before every treatment that follows, more images are used to ensure that the patient and the tumor are in the same position.

For the study, the researchers recruited 780 patients undergoing radiation therapy for non-small cell lung cancer. For each treatment, patients were positioned on the machines and an image was taken to ensure they were lying within 5 millimeters (mm) of their original position.

The researchers used the images to assess how precisely the radiation was delivered, and to determine if it shifted closer or farther away from the heart.

The patients whose radiation shifted slightly towards their heart were 30 percent more likely to die than those who experienced a similar shift away from their heart, the investigators found.

When the analysis was repeated with 177 throat cancer patients, the researchers noted an even larger difference -- about 50 percent -- even after they took other factors, such as the patients' ages, into account.

The findings were scheduled for presentation Sunday at the European Society for Radiotherapy and Oncology (ESTRO) annual meeting, in Barcelona, Spain. Research presented at meetings should be viewed as preliminary until published in a peer-reviewed journal.

The Internet's Most Trusted Source For Mental Health Information
Sign up

"By imaging patients more frequently and by reducing the threshold on the accuracy of their position, we can help lower the dose of radiation that reaches the heart and avoid unnecessary damage," Johnson said in a news release from the meeting.

More information

The U.S. National Cancer Institute has more about radiation therapy for cancer.


Copyright © 2013-2018 HealthDay. All rights reserved.


Related Content

Study Finds Tdap Vaccination for Pregnant Women Does Not Increase Risk of Autism
Study Finds Tdap Vaccination for Pregnant Women Does Not Increase Risk of Autism

A Kaiser Permanente study of more than 80,000 children born over a 4-year period...

Read more
Herpesvirus May Lead to Bipolar, Depression
Herpesvirus May Lead to Bipolar, Depression

Scientists have discovered the human herpesvirus HHV-6 in the neurons of people ...

Read more
Treating Teen Depression Might Improve Mental Health Of Parents, Too
Treating Teen Depression Might Improve Mental Health Of Parents, Too

An estimated 12.8 percent of adolescents in the U.S. experience at least one epi...

Read more
'I Am Happy and Confident': Woman Loses 140 Pounds by Making One Change at a Time
'I Am Happy and Confident': Woman Loses 140 Pounds by Making One Change at a Time

After graduating from college, Laura Morgan watched as her friends traveled, wen...

Read more
With Short, Intense Sessions, Some Patients Finish Therapy in Just Weeks
With Short, Intense Sessions, Some Patients Finish Therapy in Just Weeks

Six middle- and high-school students sat around a table on a Monday afternoon, w...

Read more
Parents of Premature Babies Face a Further Trauma - PTSD
Parents of Premature Babies Face a Further Trauma - PTSD

Suzanne Ruart's son Aiden spent three months in a neonatal unit as a result of b...

Read more