Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New system reduces risk of burns during interventional X-rays

06.12.2004


System helps physicians prevent radiation-induced skin injuries to patients



The threading of slender catheters and stents through arteries to deliver treatments to the heart, the brain and elsewhere in the body has produced nothing short of a medical revolution. But these delicate procedures require that patients be exposed to continuous radiation that can last up to an hour or more, sometimes causing skin injuries that, in rare cases, develop necrosis (tissue death), requiring skin grafts.

Now University at Buffalo researchers, working with an Amherst, N.Y., startup company called Esensors have developed a unique, real-time patient dose-tracking system, which lets physicians know when the accumulated radiation dose is approaching a dangerous threshold. The system is designed to be used either as a retrofit with existing fluoroscopy machines or to be included in the design of new machines.


Funded by grants totaling $814,000 from the U.S. Food and Drug Administration under the Small Business Innovation and Research program, the team of researchers is completing a prototype that will be clinically site-tested prior to commercialization. "Our system provides complete tracking of actual radiation levels on the skin, providing both instantaneous dose rate, as well as cumulative exposure," explained Daniel Bednarek, Ph.D., UB project director, researcher at UB’s Toshiba Stroke Research Center, professor of radiology and research associate professor of neurosurgery and biophysics in the School of Medicine and Biomedical Sciences.

Development of the system was spurred by a growing concern among physicians and by advisories issued by the Food and Drug Administration’s Center for Devices and Radiological Health warning of occasional, but severe, radiation-induced skin injuries during prolonged, fluoroscopically guided invasive procedures. "It can take a long time to insert a catheter into the brain and perform a complicated endovascular treatment, for example," explained Bednarek, also an adjunct professor in the Department of Physics in UB’s College of Arts and Sciences. "Patients undergoing such procedures sometimes develop erythema – redness – hair loss or even skin necrosis in the exposed area."

These effects can result whenever long fluoroscopic times are used during interventional procedures, such as coronary angioplasty, stent placement, radiofrequency cardiac ablation and vascular embolization. "With the equipment that currently is being used, the physician can minimize the chance for burns by moving the X-ray source instead of keeping the intensity on one spot," explained Darold Wobschall, Ph.D., UB professor emeritus of electrical engineering and president of Esensors. "The problem is that the physician is concentrating on the surgery and with X-rays coming in, he or she would have to be keeping mental track of where the dose is occurring at the same time." "Our system solves that problem," said Wobschall.

Through electronic sensors, the system tracks the position of the X-ray gantry and patient table, and thus, the location of the X-ray relative to the patient to determine the radiation exposure at the patient’s skin, he explained. "The computer tracks the beam’s location and intensity, presenting the beam and the cumulative distribution of dose on the patient’s skin as a color-coded graphic on a display screen," he said.

As the dose accumulates, the color on the display changes from green, which is acceptable, through yellow to red, which is a signal that the patient could be receiving too much radiation. This visualization of the X-ray beam and its location with reference to a graphic model of the patient presents the physician with real-time visual feedback, allowing him or her to make the appropriate adjustments. An added feature under development includes a visualization of the distribution and amount of X-ray scatter throughout the room, providing a way to gauge exposure for the physician and other health-care personnel who may be present.

The development effort for the computer graphic display was led by co-investigator Kevin Chugh, Ph.D., formerly a research scientist in UB’s New York State Center for Engineering Design and Industrial Innovation (NYSCEDII).

Petru M. Dinu, a doctoral candidate in the UB Department of Physics in the College of Arts and Sciences, played a major role in developing the system at UB’s Toshiba Stroke Research Center.

Ellen Goldbaum | EurekAlert!
Further information:
http://www.buffalo.edu

More articles from Health and Medicine:

nachricht Minimising risks of transplants
22.02.2018 | Friedrich-Alexander-Universität Erlangen-Nürnberg

nachricht FAU researchers demonstrate that an oxygen sensor in the body reduces inflammation
22.02.2018 | Friedrich-Alexander-Universität Erlangen-Nürnberg

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Good vibrations feel the force

A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.

By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...

Im Focus: Developing reliable quantum computers

International research team makes important step on the path to solving certification problems

Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Newly designed molecule binds nitrogen

23.02.2018 | Life Sciences

Stagnation in the South Pacific Explains Natural CO2 Fluctuations

23.02.2018 | Earth Sciences

Mat4Rail: EU Research Project on the Railway of the Future

23.02.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>