Capturing the information of every single photon
Quantum Technology® is transforming CT by introducing photon-counting technology into clinical routine. At its core is the QuantaMax® detector, which is equipped with a crystal semiconductor that is substantially different from a standard scintillation detector. QuantaMax detectors create CT images at high spatial resolution, without electronic noise, and with an improved contrast‐to‐noise ratio, intrinsic spectral information, and at a lower radiation dose.
Worth every effort: crafting perfect crystals
The purest cadmium telluride crystal is the starting point for a quantum leap in computed tomography technology. Years of research, development, and production have led to the generation of pure crystals with electrical properties that have revolutionized CT detector technology. Take a sneak peek into our crystal-growing lab, where the combination of innovation and craftsmanship is worth every effort.
The advantages of Quantum Technology
Improved detector efficiency with direct signal conversion
The crystal semi-conductor in the QuantaMax detector enables direct signal conversion by generating an electrical charge instead of light. Each of the tens of thousands of X-ray photons is individually measured in a single projection. The absorbed X‐rays create electron‐hole pairs in the semiconductor. The charges are separated in a strong electric field between the cathode on top of, and the pixelated anode electrodes at the bottom of the detector. This improves detector efficiency without a dose penalty as it does not require septa dividing the detector into pixels.
- Smaller detector pixels
- Elimination of noise
- Intrinsic spectral sensitivity
- Equal contribution of lower energy quanta
Smaller detector pixels
Designed with the smallest pixels ever used in a whole-body CT, Quantum Technology can deliver ultra-high-resolution images at full dose efficiency.
Elimination of electronic noise
As photon-counting detectors directly convert X-rays into electric charges which are not subject to decay and afterglow, this technology allows a clear distinction between signal and electronic noise – allowing the elimination of the latter.
Intrinsic spectral sensitivity
Measuring discrete photon energy levels in up to four energy bins means that the spectral information is captured for every exam.