Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Medical 'lightsabers': Laser scalpels get ultrafast, ultra-accurate, and ultra-compact makeover

24.04.2012
Femtosecond bursts bring new precision to laser surgery

Whether surgeons slice with a traditional scalpel or cut away with a surgical laser, most medical operations end up removing some healthy tissue, along with the bad. This means that for delicate areas like the brain, throat, and digestive tract, physicians and patients have to balance the benefits of treatment against possible collateral damage.

To help shift this balance in the patient's favor, a team of researchers from the University of Texas at Austin has developed a small, flexible endoscopic medical device fitted with a femtosecond laser "scalpel" that can remove diseased or damaged tissue while leaving healthy cells untouched. The researchers will present their work at this year's Conference on Lasers and Electro Optics (CLEO: 2012 (http://www.cleoconference.org)) in San Jose, Calif., taking place May 6-11.

The device, which was engineered with off-the-shelf parts, includes a laser capable of generating pulses of light a mere 200 quadrillionths of a second in duration. These bursts are powerful, but are so fleeting that they spare surrounding tissue. The laser is coupled with a mini-microscope that provides the precise control necessary for highly delicate surgery. Using an imaging technique known as "two-photon fluorescence," this specialized microscope relies on infrared light that penetrates up to one millimeter into living tissue, which allows surgeons to target individual cells or even smaller parts such as cell nuclei.

The entire endoscope probe package, which is thinner than a pencil and less than an inch long (9.6 millimeters in circumference and 23 millimeters long), can fit into large endoscopes, such as those used for colonoscopies.

"All the optics we tested can go into a real endoscope," says Adela Ben-Yakar of the University of Texas at Austin, the project's principal investigator. "The probe has proven that it's functional and feasible and can be [manufactured] commercially."

The new system is five times smaller than the team's first prototype and boosts the imaging resolution by 20 percent, says Ben-Yakar. The optics consist of three parts: commercial lenses; a specialized fiber to deliver the ultrashort laser pulses from the laser to the microscope; and a 750-micrometer MEMS (micro-electro-mechanical system) scanning mirror. To hold the optical components in alignment, the team designed a miniaturized case fabricated using 3-D printing, in which solid objects are created from a digital file by laying down successive layers of material.

Tabletop femtosecond lasers are already in use for eye surgery, but Ben-Yakar sees many more applications inside the body. These include repairing the vocal cords or removing small tumors in the spinal cord or other tissues. Ben-Yakar's group is currently collaborating on two projects: treating scarred vocal folds with a probe tailored for the larynx, and nanosurgery on brain neurons and synapses and cellular structures such as organelles.

"We are developing the next-generation clinical tools for microsurgery," says Ben-Yakar.

The new design has so far been laboratory-tested on pig vocal chords and the tendons of rat tails, and an earlier prototype was laboratory-tested on human breast cancer cells. The system is ready to move into commercialization, says Ben-Yakar. However, the first viable laser scalpel based on the team's device will still need at least five years of clinical testing before it receives FDA approval for human use, Ben-Yakar adds.

The work was supported by the National Science Foundation and by the University of Texas Board of Regents Texas Ignition Fund.

CLEO: 2012 presentation ATh1M.3, "9.6-mm diameter femtosecond laser microsurgery probe," by Christopher Hoy et al. is at 8:45 a.m. Thursday, May 10 in the San Jose Convention Center.

EDITOR'S NOTE: Images are available to members of the media upon request. Contact Angela Stark, astark@osa.org.

Press Registration

A Press Room for credentialed press and analysts will be located on-site in the San Jose Convention Center, May 6 – May 11. Media interested in attending the conference should register on the CLEO website (http://www.cleoconference.org/home/news-and-press/press-and-analysts/press-and-analyst-registration-form.aspx) or contact Angela Stark at 202.416.1443, astark@osa.org.

About CLEO

With a distinguished history as the industry's leading event on laser science, the Conference on Lasers and Electro-Optics (CLEO) and the Quantum Electronics Laser Science Conference (QELS) is where laser technology was first introduced. CLEO: 2012 will unite the field of lasers and electro-optics by bringing together all aspects of laser technology, with content stemming from basic research to industry application. Sponsored by the American Physical Society's (APS) Laser Science Division, the Institute of Electronic Engineers (IEEE) Photonics Society and the Optical Society (OSA), CLEO: 2012 provides the full range of critical developments in the field, showcasing the most significant milestones from laboratory to marketplace. With an unparalleled breadth and depth of coverage, CLEO: 2012 connects all of the critical vertical markets in lasers and electro-optics. For more information, visit the conference's website at www.cleoconference.org.

Angela Stark | EurekAlert!
Further information:
http://www.osa.org
http://www.cleoconference.org
http://www.eurekalert.org/pub_releases/2012-04/osoa-ml042312.php

More articles from Medical Engineering:

nachricht 3-D visualization of the pancreas -- new tool in diabetes research
15.03.2017 | Umea University

nachricht New PET radiotracer identifies inflammation in life-threatening atherosclerosis
02.03.2017 | Society of Nuclear Medicine

All articles from Medical Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

When Air is in Short Supply - Shedding light on plant stress reactions when oxygen runs short

23.03.2017 | Life Sciences

Researchers use light to remotely control curvature of plastics

23.03.2017 | Power and Electrical Engineering

Sea ice extent sinks to record lows at both poles

23.03.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>