Vessels are important parts of our body. Their function is critical to our well-being. For years, doctors have tried various tools to take pictures of arteries that would help them in diagnosing or preventing diseases. This has not been an easy task, however, and sometimes they have to use imaging methods that may have some harmful side effects. It has always been a challenge to take clear pictures of vessel without the negative side effects. Here, we suggest a new way that may help us to achieve this goal.
Vessels in our body are narrow tubes, with many branches along the way. Each segment may be thought of as a string, much like a piano string, extending from one point to another. Hammering on a piano string helps a tuner to "visualize" the string and find out if the string is in a good condition or not. We use the same concept, but with more sophistication, in our new imaging method. In our method, we tap a vessel to make it vibrate at its natural tone, and we record the sound produce by the "singing" vessel. As we move the tapping point across the area around the vessel, we record the sound and map point-by-point to make an image. The sound would be strong only if we are tapping on the vessel. The result is a "picture" of the vessel. This picture actually shows the vibration or sound of the vessel, so we may call it a "sound" image. If there is a change in vessel properties, for example due to a disease, the change will effect the natural tone of the vessel and therefore would be visible in this "sound" image.
In practice, the tapping is done with a specially designed ultrasound probe and the sound is recorded by a sensitive laser system that detects vessel vibrations from outside. This way we do not need to have direct access to the vessel. The method is considered safe because we do not use harmful radiations. Our initial experiments on objects resembling human vessels have shown promising results.
Xiaoming Zhang | American Institute of Physics
NIH scientists describe potential antibody treatment for multidrug-resistant K. pneumoniae
14.03.2018 | NIH/National Institute of Allergy and Infectious Diseases
Researchers identify key step in viral replication
13.03.2018 | University of Pittsburgh Schools of the Health Sciences
Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...
On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...
The world’s second-largest ice shelf was the destination for a Polarstern expedition that ended in Punta Arenas, Chile on 14th March 2018. Oceanographers from...
At the 2018 ILA Berlin Air Show from April 25–29, the Fraunhofer Institute for Laser Technology ILT is showcasing extreme high-speed Laser Material Deposition (EHLA): A video documents how for metal components that are highly loaded, EHLA has already proved itself as an alternative to hard chrome plating, which is now allowed only under special conditions.
When the EU restricted the use of hexavalent chromium compounds to special applications requiring authorization, the move prompted a rethink in the surface...
At the ILA Berlin, hall 4, booth 202, Fraunhofer FHR will present two radar sensors for navigation support of drones. The sensors are valuable components in the implementation of autonomous flying drones: they function as obstacle detectors to prevent collisions. Radar sensors also operate reliably in restricted visibility, e.g. in foggy or dusty conditions. Due to their ability to measure distances with high precision, the radar sensors can also be used as altimeters when other sources of information such as barometers or GPS are not available or cannot operate optimally.
Drones play an increasingly important role in the area of logistics and services. Well-known logistic companies place great hope in these compact, aerial...
16.03.2018 | Event News
13.03.2018 | Event News
08.03.2018 | Event News
16.03.2018 | Earth Sciences
16.03.2018 | Physics and Astronomy
16.03.2018 | Life Sciences