Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Minimal Exposure for Outstanding CT Images

With the development of the Stellar detectors, Siemens has increased the sensitivity of its computer tomography (CT) detectors to an unprecedented level.

CT scanners are equipped with one or two X-ray tubes that rotate around the patient. A detector is positioned opposite each tube. Bones and body tissue attenuate X-rays to different degrees. The detectors register the X-rays and transform them into digital signals. The results are high-resolution CT images.

The new Stellar detectors can generate images of even higher quality than was previously the case, even if lower X-ray dosages are used. As a consequence, a Stellar-equipped scanner such as the Somatom Definition Flash can, for example, make a complete scan of the heart in less than one-third of a second and still achieve a resolution of 0.30 millimeters.

What's more, the exposure to radiation is significantly reduced. Thanks to the short scanning times, patients can be examined without having to take beta blockers that lower their heart rate. Obese people can also be examined more easily as the Stellar detectors provide good images even if the X-ray signals are extremely attenuated by thick layers of fat tissue. The same applies to scans made with extremely low doses of radiation, such as those used to examine children and pregnant women.

The key to achieving such a high level of sensitivity is an all-new detector technology that almost totally eliminates the "noise" of the electronic components. The CT detector contains scintillator crystals that first convert the incoming X-rays into visible light.

Photodiodes then convert the light into an analogue electrical signal, which is subsequently digitized. The digital data is used to create cross-sectional images without any overlap. The length of the electrical connection between the analogue components influences the signal-noise ratio and thus the detector's sensitivity. It was decided to reduce the length of the cables, which are only a few centimeters long, to a minimum. To this end, in conjunction with Siemens' global research unit Corporate Technology and the microchip manufacturer AMS, Siemens Healthcare developed a chip with an integrated circuit as well as photodiodes and analogue-digital converters. The new detector is not only more sensitive than previous systems but also consumes 80 percent less energy.

Siemens is equipping all of the new CT scanners from the Somatom Definition Flash and Somatom Definition Edge series with Stellar detectors. Older Somatom Definition Flash and Somatom Definition AS scanners can be retrofitted.

Dr. Norbert Aschenbrenner | Siemens InnovationNews
Further information:

Further reports about: CT scan CT scanner Somatom Stellar Jets X-ray microscopy X-ray tube X-rays

More articles from Medical Engineering:

nachricht Gentle sensors for diagnosing brain disorders
29.09.2016 | King Abdullah University of Science and Technology

nachricht New imaging technique in Alzheimer’s disease - opens up possibilities for new drug development
28.09.2016 | Lund University

All articles from Medical Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

Im Focus: Ultra-thin ferroelectric material for next-generation electronics

'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.

Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Novel mechanisms of action discovered for the skin cancer medication Imiquimod

21.10.2016 | Life Sciences

Second research flight into zero gravity

21.10.2016 | Life Sciences

How Does Friendly Fire Happen in the Pancreas?

21.10.2016 | Life Sciences

More VideoLinks >>>