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Realising the Future of X-ray Detectors

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Direct conversion – compared to indirect conversion.

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Empowered X-ray Imaging

First to deliver affordable hybrid photon counting detectors.

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A Global Leader in X-ray Detectors

We are the technology leader in direct conversion, digital X-ray imaging for medical, dental and industrial markets. Our team introduced the world’s first affordable plug-and-play photon counting detectors and changed the market with its ground-breaking hybrid sensors. We are the largest manufacturer of cadmium telluride detectors in the world, with a broad range of both charge integrating and photon counting products. Direct Conversion has combined the know-how of Ajat and XCounter to set new standards in X-ray detector technology.

Customers are welcome to see for themselves how our technology can benefit their application at our new Application Innovation Centre in Munich.

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Latest News

ASNT 2019: See Chief Mathematician Dr Alex Stewart, Nov 20th, 13:00, Innovation Forum
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ASNT 2019: Watch Our XC-Thor Video and Find Out More at Booth 1334
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RSNA: 1-6 December 2019, McCormick Place, Chicago
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ASNT: 18-21 November 2019, Westgate Resort, Las Vegas
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Job Opportunity: Senior Electronics Engineer at Growth Company with Market Leading Technology
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Job Opportunity: Senior FPGA Designer at Growth Company with Market Leading Technology
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IEEE Nuclear Science Symposium (NSS) and Medical Imaging Conference (MIC): 26 Oct-2 Nov, Manchester Convention Centre
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Professor Dr Franz Pfeiffer Speaks at Inaugural Symposium
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Direct Insights

Insights from Direct Conversion

Understanding our technology and our business

All insights

ASNT 2019: See Chief Mathematician Dr Alex Stewart, Nov 20th, 13:00, Innovation Forum

Learn More

ASNT 2019: Watch Our XC-Thor Video and Find Out More at Booth 1334

Learn More

RSNA: 1-6 December 2019, McCormick Place, Chicago

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Frequently Asked Questions

Why does CdTe have high absorption?

CdTe is a compound semiconductor made from cadmium and tellurium. Since the atomic number of both materials is high (Cd:48, Te:52) and CdTe has a high density (5.85g/cm3), it can absorb radiation more effectively.

What are the characteristics of CdTe detectors?

Due to its high density, CdTe is very radiation hard which means that it can be used in applications at very high energies (MeV). This radiation hardness also means that it has a longer lifetime than many other X-ray detectors, being resistive to radiative damage. CdTe detectors also have good spatial resolution and are extremely efficient which allows them to be used in very low dose situations.

What is CdTe?

Cadmium telluride (CdTe) is a stable crystalline compound formed from cadmium and tellurium and can be used as a compound semiconductor. CdTe is used in the next generation X-ray detectors. It absorbs radiation and efficiently converts it to an electronic signal.

What are the differences between CdTe and other radiation detectors?

CdTe is a direct conversion detector and as such does not need to turn the X-ray photon into a light photon before recording it. This means the position of the conversion can be more accurately recorded and the signal is directly related to the energy of the converted photon. Other radiation detectors use scintillators to convert X-rays to light. This process causes significant blur and loss of efficiency.

What is a “scintillator”?

A scintillator is a substance such as gadolinium oxysulfide or caesium iodide that converts an X-ray photon into a light photon. The light photons can then be recorded by a normal CMOS or CCD camera. Light photons travel in all directions, causing a loss of accuracy in spatial resolution. Typically, scintillation technologies are not as efficient as CdTe at stopping X-rays.