Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Virtual robot outlines damaged heart muscle

24.05.2002


In a joint project with the STW Technology Foundation, medical information technologists from Leiden have developed a virtual robot which meticulously scans the heart muscle using images of the heart. The contours detector reduces the work of specialists and does not affect the patients. The research group will present the results in the middle of May at a congress in Honolulu.



To map the condition of a patient’s heart, physicians have until now used a series of MRI images (magnetic resonance imaging). The images provide 10 cross-sections of the heart on 20 phases during a single heartbeat. Then on at least 40 of the 200 images the physician marks the contours of the heart muscle by hand. This very accurately but subjectively reveals where the heart muscle is less thick during the heartbeat. These parts of the heart wall have already died or receive less oxygen upon exertion. If the physician requires more information, he marks all 200 images.

In the newly-developed contours detector, a virtual robot delineates the heart boundaries on the MRI images. The contours indicate where the heart wall lies and therefore the thickness of the heart muscle at any given point. The robot is objective and self-learning. When the image has too little contrast for a boundary line to be drawn with certainty, the robot ’remembers’ an example from a previous `training`. Together with the rules dictated by the programmers, the intelligent system then constructs a ‘surgically precise’ contour. This makes the time-consuming drawing of the contours by hand obsolete. Patients are not even aware of the robot, as the entire process takes place in the computer using stored MRI images.


The robot moves like a car along the heart wall, drawing the contours on the images as it goes. The size, speed and minimum turning circle of the virtual vehicle are adjusted by the researchers to the individual properties of the patient’s heart, such as the weight and the amount of blood the heart can pump. Sensors on the front and side of the robot help it to navigate ‘safely’ so that it does not collide with the wall.

In this joint project with the STW Technology Foundation, the researchers from Leiden University Medical Center limited themselves to the automatic outlining of the left ventricle in the heart because this pumps blood to the body.

Michel Philippens | alphagalileo

More articles from Health and Medicine:

nachricht One gene closer to regenerative therapy for muscular disorders
01.06.2017 | Cincinnati Children's Hospital Medical Center

nachricht The gut microbiota plays a key role in treatment with classic diabetes medication
01.06.2017 | University of Gothenburg

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: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>