The Applications of Cadmium Zinc Telluride (CZT) in CT Scans

The Applications of Cadmium Zinc Telluride (CZT) in CT Scans
 
The advantages of Cadmium Zinc Telluride (CZT) detectors in CT scans mainly include the following points:
 
1. High energy resolution: CZT detectors can directly convert photons into charge without the need for photomultiplier tubes and photoelectric conversion processes, which gives them better charge collection characteristics and energy resolution. Compared with detectors using scintillation crystals, the energy resolution of CZT detectors is improved by about 3 times.
 
2. High detection efficiency: The manufacturing process of CZT detectors allows the adjustment of crystal volume and pixel size according to specific detection requirements, thus performing well in spatial and energy resolution. In addition, the energy detection range of CZT detectors at room temperature is 10keV～6MeV, which is very suitable for detecting photons with energy between 10～500keV.
 
3. Small volume and light weight: Since CZT detectors do not require photomultiplier tubes or external cooling equipment, they have a smaller volume and lighter weight.
 
4. Low leakage current and noise: The resistivity of CZT crystals is as high as 10¹¹ Ω·cm, which is one of the reasons for their low leakage current and noise.
 
5. Good stability: CZT materials have no deliquescence phenomenon and stable chemical properties, unlike sodium iodide (NaI) scintillation crystals which are prone to deterioration due to deliquescence.
 
In summary, due to their excellent performance, Cadmium Zinc Telluride (CZT) detectors exhibit significant advantages in CT scans, especially in improving image quality and accelerating scanning speed.