Featured Research

from universities, journals, and other organizations

Technique Reduces Time Spent On Radiation Doses

Date:
September 18, 2003
Source:
Washington University In St. Louis
Summary:
Researchers at Washington University in St. Louis have developed a technique that drastically decreases the time a radiologist spends calculating radiation dosages and also provides a more carefully controlled dosage with less damage to nearby healthy tissues.

Researchers at Washington University in St. Louis have developed a technique that drastically decreases the time a radiologist spends calculating radiation dosages and also provides a more carefully controlled dosage with less damage to nearby healthy tissues.

Related Articles


Victor Wickerhauser, Ph.D., Washington University professor of mathematics in Arts & Sciences, and Joseph O. Deasy, Ph.D., assistant professor of radiation oncology in the School of Medicine, have applied a mathematical tool called wavelet analysis to radiation dose distributions simulations and have sped up the dose calculations by a factor of two or more over the standby dose calculation, called a Monte Carlo dose calculation method.

Wavelet analysis is a sophisticated kind of harmonic analysis that is integral in analyzing and compressing data -- video, sound, or photographic, for instance -- for a wide range of applications.

"Instead of taking hours, it takes minutes," said Wickerhauser, a pioneer in wavelet analysis who has applied the tool on analysis of fingerprints for the FBI, among many other applications. "The speed allows the radiation dose to be controlled more carefully, which will provide less damage to adjacent healthy tissues."

To get an accurate estimation of how much radiation should be given during a treatment, a dose distribution simulation first is performed.

This involves a model of radiation particles that simulates how the particles scatter over each other and other molecules. The Monte Carlo dose calculation method requires calculating 100 million particles to come up with a simulated dose. Wickerhauser and Deasy have used wavelets to speed the calculation up to where only one to four million particles are needed to come up with the simulation.

The technique of simulating radiation dose distributions has long been a mainstay in radiation oncology because radiologists don't want to irradiate nearby healthy tissue, especially if the cancer is near vital areas such as the ovary, bone marrow, spinal cord or the brain.

The researchers have submitted the wavelet-based simulation algorithm used for the wavelet analysis for a patent. Much of the programming for the algorithm was performed by Mathieu Picard, a visiting undergraduate student working on his honor's thesis for the Ecole Polytechnique, Palaiseau, France, considered France's finest technical university. The three co-authored a paper describing the technique in Medical Physics, 29 (10), October 2002. The research was supported by a grant from the National Cancer Institute.

Wickerhauser collaborates with researchers worldwide on problems that might better be solved by wavelet analysis. The radiation dosage distribution problem was a good candidate for wavelet-based simulation because wavelets give good fast approximations to smooth data fields with "rough" noise, such as is produced by Monte Carlo simulations with relatively few particles. Wavelets take out more of the roughness while preserving more of the true sharp features of the "smooth" function than other approximations.

"Wavelet approximations take rough things and give you smooth things, without destroying sharpness," Wickerhauser said.


Story Source:

The above story is based on materials provided by Washington University In St. Louis. Note: Materials may be edited for content and length.


Cite This Page:

Washington University In St. Louis. "Technique Reduces Time Spent On Radiation Doses." ScienceDaily. ScienceDaily, 18 September 2003. <www.sciencedaily.com/releases/2003/09/030917073018.htm>.
Washington University In St. Louis. (2003, September 18). Technique Reduces Time Spent On Radiation Doses. ScienceDaily. Retrieved December 21, 2014 from www.sciencedaily.com/releases/2003/09/030917073018.htm
Washington University In St. Louis. "Technique Reduces Time Spent On Radiation Doses." ScienceDaily. www.sciencedaily.com/releases/2003/09/030917073018.htm (accessed December 21, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Sunday, December 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Touch-Free Smart Phone Empowers Mobility-Impaired

Touch-Free Smart Phone Empowers Mobility-Impaired

Reuters - Innovations Video Online (Dec. 21, 2014) A touch-free phone developed in Israel enables the mobility-impaired to operate smart phones with just a movement of the head. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Earthworms Provide Cancer-Fighting Bacteria

Earthworms Provide Cancer-Fighting Bacteria

Reuters - Innovations Video Online (Dec. 21, 2014) Polish scientists isolate bacteria from earthworm intestines which they say may be used in antibiotics and cancer treatments. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Reuters - Innovations Video Online (Dec. 21, 2014) A team of scientists led by Danish chemist Jorn Christensen says they have isolated two chemical compounds within an existing antipsychotic medication that could be used to help a range of failing antibiotics work against killer bacterial infections, such as Tuberculosis. Jim Drury went to meet him. Video provided by Reuters
Powered by NewsLook.com
Hugging It Out Could Help You Ward Off A Cold

Hugging It Out Could Help You Ward Off A Cold

Newsy (Dec. 21, 2014) Carnegie Mellon researchers found frequent hugs can help people avoid stress-related illnesses. 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:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

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