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Technology for Security

Fast Imaging for Swift Detection

Technology to Ensure International Security

The XC-TDI is at the forefront of the new technologies tackling increased threats to passenger safety worldwide. Its rapid imaging speed compared to other X-ray detectors make the XC-TDI an essential addition to international security systems where critical decisions have to be made fast. The dual energy capability allows for highly refined levels of material discrimination, ensuring hazardous substances can be swiftly detected and intercepted.

With safety as a priority, the low-dose XC-TDI is kinder to passenger health while also protecting electronic possessions from damage.



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The XC-TDI series detector is a fast, dual energy, photon counting industrial detector.

Ideal for line scan applications which demand high speed inspection and material discrimination, the cadmium telluride (CdTe) photon counting technology enables high resolution imaging at fast speed with the ability to differentiate between subject materials. Its sensitivity, combined with efficient TDI scanning, maximises the use of available X-rays in generating high quality images thereby decreasing X-ray tube power requirements. The radiation hardness of CdTe offers the additional benefit of extending detector lifetime.

All Varex/Direct Conversion imaging receptors are designed to be integrated into a complete X-ray system by a qualified system integrator. The system integrator is responsible for obtaining FDA clearance for medical use or appropriate CE marking.


The basic component in our detectors is a direct conversion material, which converts the X-rays into electrical signals, and a CMOS (ASIC) which transforms the electrical signals into a data stream of either the integrated electrical charge or the number of photons which has entered each pixel. This data is then used to create a digital image which is either two- or three-dimensional, depending on the scan geometry.

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