Security
Dual-Energy Portable X-ray Large Size 2D Digital Radiography Detector For Non-Destructive Testing and Threats Detections in Baggage
Fast identification of threatening materials by X-ray dual-energy Radioscopy and Tomography is widely used in security measures.
We have succeed in developing data analysis algorithms that can precisely identify materials in Radioscopy and Tomography using dual-energy techniques.
Briefcase - classical and dual-energy images taken with DUALTOMO, 0.4 pixel pitch size.
An experiment is presented, made with a real hand luggage having inside a shoe, a book, a Coke bottle, a toothpaste tube, soap, cologne bottle, a photocamera and a cylinder of explosive simulant. The standard (in attenuation coefficients values) image and Atomic effective number images of the hand luggage are presented. A comparison between Explosive simulant Zeff value and Coke Zeff value shoes significant difference.
Further investigation of the above luggage continues by doing a cross section tomogram in the region of the dashed line from above.
The two energies attenuation coefficients tomograms (B&W images) and also Zeffective (right) and Density (left) tomograms are presented This time the Zeffective value and the Density value for the simulant explosive material are measured with better accuracy and its identification is more precisely.
Fast identification of threatening materials by X-ray dual-energy Radioscopy and Tomography is widely used in security measures.
We have succeed in developing data analysis algorithms that can precisely identify materials in Radioscopy and Tomography using dual-energy techniques.
Dual-energy
The dual-energy method - which could be successfully applied in Digital radiography (radioscopy) and also inTomography - is based on measurements of radiation attenuation coefficients acquired at two different X or Gamma rays energies from which, by means of a specialized and dedicated algorithm, could be computed the Atomic effective number (Zeff) and the Density (ρ) of the scanned objects. The method has large application in baggage control screening, food control, medicine (bone densitometry and mammography), minerals and drilling cores analysis, etc., domains where a specific material should be identified, a small variation should be detected or a better image contrast is required.
