This technology has the potential to substantially reduce production costs and also promises better image resolution than is possible with today's detectors. The innovation involves mixing specific substances into organic detector materials.
The substances involved absorb X-ray radiation, which is converted into visible light. Siemens' global Corporate Technology department is coordinating a three-year government-funded project known as HOP-X, in which the associated technology will be developed and demonstrated.
According to experts, initial potential applications include mammography devices and conventional X-ray machines.
Most of today's X-ray detectors consist of a scintillator coating that converts X-rays into visible light and a photodiode that registers the light in pixels. The savings potential offered by this amorphous silicon-based technology is largely exhausted, however. Today's units also have a dose-measurement chamber that monitors the set dose from a position between the patient and the detector.
This chamber must not be allowed to affect the X-ray image produced. Ionization measurement chambers have been used for this application up until now. However, such chambers are not sufficiently sensitive or shadow-free for the low doses of radiation that today's X-ray machines are capable of emitting.
Organic photo detectors can improve both aspects. These detectors are based on organic plastics and can be sprayed or printed onto a substrate at a low cost. This largely decouples production costs from the detector surface area, which is not the case with crystalline detectors. The organic diodes can also be used as dose-measurement chambers. They are more sensitive than ionization measurement chambers and can be structured more easily, which means the measurement unit can be adjusted to individual patient dimensions and dose regulation can be controlled more effectively.
The problem is that organic photodiodes mostly detect visible light. That's why Siemens researchers are developing special nanoparticles that can be mixed into the organic plastic solution as scintillators. Other project partners are examining an alternative that involves admixing semiconductor nanocrystals that directly absorb X-ray light, which is forwarded to the organic detector matrix in the form of electrons. Siemens is also responsible for the design of the new photodiodes and the creation of demonstration systems. The other Hop-X partners are Merck KgaA, the Leibniz Institute for New Materials and CAN-GmbH.
Dr. Norbert Aschenbrenner | Siemens InnovationNews
Turning entanglement upside down
22.05.2018 | Universität Innsbruck
Astronomers release most complete ultraviolet-light survey of nearby galaxies
18.05.2018 | NASA/Goddard Space Flight Center
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
02.05.2018 | Event News
13.04.2018 | Event News
12.04.2018 | Event News
22.05.2018 | Trade Fair News
22.05.2018 | Trade Fair News
22.05.2018 | Life Sciences