On Friday, May 31, Anders Eklund, Department of Radiation Sciences, Medical Technology, Umeå University, Sweden, will defend his dissertation evaluating a new and simpler instrument for measuring the pressure of eye fluids, a key risk factor in glaucoma. Anders Eklund has a master’s in engineering and works at the Unit for Medical Technology and Informatics, Northern Sweden University Hospital. He has further developed and assessed a new type of sensor based on vibration technology. His work has targeted medical applications, above all measuring pressure in the eye and hardness in bodily tissue. High pressure in eye fluid is one of the prime risk factors in glaucoma. Intraocular pressure is routinely metered at eye clinics. The pressure is determined by flattening the cornea to make both the surface of the contact and the force of the contact measurable.
The dissertation presents a new and simpler method for measuring intraocular pressure: a system of sensors based on a piezo-electrically vibrating sensor element registers changes in the frequency of resonance, which is related to the contact surface. This resonance sensor is mounted on a force sensor, and when the instrument has been placed against the cornea, both the force and the surface of the contact are measured quickly and simultaneously; the eye pressure is determined on the basis of a coefficient between them. The results show that a simpler and quicker method of measuring pressure is possible thanks to this technique.
The capacity of this vibration sensor technique to measure contact surfaces has also been utilized in judging the hardness of prostate tissue removed by surgery. The study shows that the sensor can capture differences in hardness owing to the varying composition of different tissues. The composition and consistency of bodily tissues often change under disease conditions, such as cancer, and ultimately it should be possible to employ sensor technique to get an objective reading of tissue hardness, thereby improving diagnoses.
Hans Fällman | alphagalileo
Ayahuasca compound changes brainwaves to vivid 'waking-dream' state
19.11.2019 | Imperial College London
A step closer to cancer precision medicine
15.11.2019 | University of Helsinki
Nanooptical traps are a promising building block for quantum technologies. Austrian and German scientists have now removed an important obstacle to their practical use. They were able to show that a special form of mechanical vibration heats trapped particles in a very short time and knocks them out of the trap.
By controlling individual atoms, quantum properties can be investigated and made usable for technological applications. For about ten years, physicists have...
An international team of scientists, including three researchers from New Jersey Institute of Technology (NJIT), has shed new light on one of the central mysteries of solar physics: how energy from the Sun is transferred to the star's upper atmosphere, heating it to 1 million degrees Fahrenheit and higher in some regions, temperatures that are vastly hotter than the Sun's surface.
With new images from NJIT's Big Bear Solar Observatory (BBSO), the researchers have revealed in groundbreaking, granular detail what appears to be a likely...
The Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM in Dresden has succeeded in using Selective Electron Beam Melting (SEBM) to...
Carbon nanotubes (CNTs) are valuable for a wide variety of applications. Made of graphene sheets rolled into tubes 10,000 times smaller than a human hair, CNTs have an exceptional strength-to-mass ratio and excellent thermal and electrical properties. These features make them ideal for a range of applications, including supercapacitors, interconnects, adhesives, particle trapping and structural color.
New research reveals even more potential for CNTs: as a coating, they can both repel and hold water in place, a useful property for applications like printing,...
If you've ever tried to put several really strong, small cube magnets right next to each other on a magnetic board, you'll know that you just can't do it. What happens is that the magnets always arrange themselves in a column sticking out vertically from the magnetic board. Moreover, it's almost impossible to join several rows of these magnets together to form a flat surface. That's because magnets are dipolar. Equal poles repel each other, with the north pole of one magnet always attaching itself to the south pole of another and vice versa. This explains why they form a column with all the magnets aligned the same way.
Now, scientists at ETH Zurich have managed to create magnetic building blocks in the shape of cubes that - for the first time ever - can be joined together to...
15.11.2019 | Event News
15.11.2019 | Event News
05.11.2019 | Event News
19.11.2019 | Life Sciences
19.11.2019 | Physics and Astronomy
19.11.2019 | Health and Medicine