Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New technology for examining cardiovascular blood vessels

14.04.2016

For the examination of coronary blood vessels, intravascular methods with imaging technologies are already state-of-the-art. However, ultrasonic methods, which are used to gather information about the tissue, can only be used externally, up to now. The piezo electronical components necessary for this have not been sufficiently miniaturized to be inserted into the blood vessels.

The Laser Zentrum Hannover e.V. (LZH) and the Technion – Israel Institute of Technology would like to change this. This group of researchers are thus working on an opto-acoustical sensor for medical ultrasonic technology.


The opto-acoustical sensor consists of an ultrasonics generating lighting fiber, an acoustical lens, and an ultrasonic detector element.

Photo: LZH

For reliable cardiological diagnostics, intravascular examinations are indispensable. This minimal invasive surgical interventions insert optical sensors directly into the coronary blood vessels and enable a more detailed image of the vessel than could be made using external investigation methods.

Opto-acoustical sensor for detailed images

Now, the scientists want to combine intravascular diagnostics with ultrasonic technology. However, the piezo electronical components necessary for this have not yet been sufficiently miniaturized. For this reason, the new technology is based on optical interferometry:

The intravascular module should be equipped with an opto-acoustical imaging sensor which can provide an internal image of the tissue of the coronary blood vessels up to a depth of 1 mm. To achieve this, a guided laser impulse from an illuminating fiber is first absorbed by the blood vessel tissue. The resulting ultrasonics are then guided to a fiber-based ultrasonic detector via an acoustical lens.

By transforming this signal into an optical signal, a complete image of the vascular walls can be made. An optical interferometer recognizes deviations in the reflection pattern, making the detection of abnormal or disease-based changes in the tissue possible.

The diagnosis of diseases and disorders, for example arteriosclerosis, will be much simpler since this sensor should have a significantly higher sensitivity and resolution, in comparison to present methods. Also, the use in other areas is being considered. Optical interferometry should be examined as an alternative to present ultrasonic detections, including the use for technical applications.

Process Engineering from the LZH

The scientists in the Laser Micromachining Group are developing the process engineering necessary for the production of the acoustical lenses. These will be inserted directly into the glass substrate. In order to do so, specific areas of the substrate will be removed first using the laser, and then polished.

Further parts of the intravascular sensor module are, apart from the lens, an ultrasonic detector element, and a lighting fiber for ultrasonic stimulus. The design and the conversion of the signals into an image which can be used for diagnostics is being developed by the scientists at the Technion.

The research project „Integrated silica-based photoacoustic probe for intravascular imaging via laser micro-machining and interferometric sensors“ is being jointly led by Prof. Dr.-Ing. Ludger Overmeyer (LZH) and Ass. Prof. Amir Rosenthal (Technion). It will be supported by the state of Lower Saxony until the beginning 2019 within the course of the funding initiative “Niedersächsisches Vorab”.

Dr. Nadine Tinne | idw - Informationsdienst Wissenschaft
Further information:
http://www.lzh.de/

More articles from Medical Engineering:

nachricht Medica 2018: New software for a more efficient planning of minimally invasive surgery
06.11.2018 | Technische Universität Kaiserslautern

nachricht SwRI improves structural health monitoring with magnetostrictive transducer
30.10.2018 | Southwest Research Institute

All articles from Medical Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: A Chip with Blood Vessels

Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.

Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...

Im Focus: A Leap Into Quantum Technology

Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.

In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...

Im Focus: Research icebreaker Polarstern begins the Antarctic season

What does it look like below the ice shelf of the calved massive iceberg A68?

On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.

Im Focus: Penn engineers develop ultrathin, ultralight 'nanocardboard'

When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure

Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...

Im Focus: Coping with errors in the quantum age

Physicists at ETH Zurich demonstrate how errors that occur during the manipulation of quantum system can be monitored and corrected on the fly

The field of quantum computation has seen tremendous progress in recent years. Bit by bit, quantum devices start to challenge conventional computers, at least...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“3rd Conference on Laser Polishing – LaP 2018” Attracts International Experts and Users

09.11.2018 | Event News

On the brain’s ability to find the right direction

06.11.2018 | Event News

European Space Talks: Weltraumschrott – eine Gefahr für die Gesellschaft?

23.10.2018 | Event News

 
Latest News

The dawn of a new era for genebanks - molecular characterisation of an entire genebank collection

13.11.2018 | Life Sciences

Fish recognize their prey by electric colors

13.11.2018 | Life Sciences

Ultrasound Connects

13.11.2018 | Awards Funding

VideoLinks
Science & Research
Overview of more VideoLinks >>>