Our Offers

Dual-energy X-Ray Tomogram of linear mica-rich gneiss mineral rock.

Dual-energy X-Ray Tomogram of linear mica-rich gneiss mineral rock. The image reveals the standard tomogram of the rock cross-section (left), the corresponding Zeff map (middle) and the ρ map (right). A better contrast is obtained in Zeff and ρ images from where an average density of 2.86 gr/cm3 and an average Atomic effective number of 10.23 was computed.   

An example of software improvement made for an X-ray radioscopic system by implementing a semi-automated technique for measuring an internal column length.

Digital Radiography (Radioscopy)

The Radioscopy is one of the most used and efficient Non-Destructive Testing methods, which combines the simplicity of radiation exposure with the power of computer graphics analysis. There is no need for films and sometimes the visual interpretation is replaced by automate computer graphics analysis that makes this method one of the most reliable and easy to use in today's control technology.

We are offering:

  • Development of new fully computerized radioscopic NDT control equipment compliant with customer specification
  • Modernization of old X or Gamma ray radiography equipments by adding the digital X-ray camera (or linear array detectors) and related software for computerized NDT investigation
  • Modernization of the existing X or Gamma Ray digital radioscopy equipment by adding the software packages dedicated for the customers' specific investigations
  • Implementation of various materials identification methods, like dual-energy technique.

All software packages are built in LabView(tm) G language (from National Instruments(tm) Corporation) and are easily adapted for all type of investigations.

 

Dual-energy

The dual-energy method - which could be successfully applied in Digital radiography (radioscopy) and also in Tomography - 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.               

Dual-energy X-Ray Tomogram of an extracted core

Dual-energy X-Ray Tomogram of an extracted core

Dual-energy X-Ray Tomogram of an extracted core collected downstream the confluence of the Danube River with the Danube-Black Sea Channel. The Density map (top right) reveals better the sedimentary details.   

core # 1 -Zeff and Density tomograms

Sample Cores Analysis

GENERAL NOTE (11th of July 2013)

•The scans have been made using an existing laboratory X-ray scanner and an adapted dual-energy linear array detector, thus the performances are not “the best achievable” .
• The calibration in Zeff and Density is only indicative, being adapted for organic materials; later is expected that around 3% accuracy could be achieved by using adequate reference samples;
• Some streaks and image artifacts are due  to detectors different gains, effects that could be later eliminated.
• For each scan has been acquired 400 projections coming from 2x256 dual-energy 0.8mm pitch detectors and the tomogram is reconstructed in 400 x 400 pixels
• All tomograms has been acquired at 160kVp/2.2mA and 2ms detectors integration time
• Only for first sample are presented the tomograms for low and high energy attenuation coefficients;
• The reconstruction algorithm used is the Filtered Back Projection; later 3D data acquired by successive continuously scan could be presented.

core # 2 - Zeff and Density tomogramscore # 1 - Low and High attenuation coefficients tomogramscore # 3 - 98 Zeff and density tomograms

Dual-energy X-Ray Digital radiography

Dual-energy X-Ray Digital radiography (radioscopy) of various materials (Steel, Al, water and other organic materials) having thickness in steps between 1mm to 100mm. The graphs show the standard radioscopic image (top left), the Zeff map image (top right), the ρ map image (bottom right) and the equivalent thickness image (bottom left). The images reveals the Zeff and ? maps with colored palette for better identifying the materials and the equivalent thickness image gives each materials thickness. All information being very useful for operators of various X-Ray screening devices.     

Coefficients Attenuation technique

Materials identification can also be done by comparing the attenuation coefficients resulting from the tomographic reconstruction with standard data from database. In the top right figure is presented a gamma ray (Ir192) tomogram of various pure and mixed materials: silicon, aluminum, ceramic mass, selenium, iron, pressed iron, copper, pressed copper, pressed iron-copper mixture, brass and molybdenum, shaped as circular or rectangular material rods.

The next image shows the extended histogram of attenuation coefficients of the tomogram. The attenuation peaks (corresponding to tomograms' materials) may be clearly observed, measured and compared with the standard values from the database. The accuracy of the method is around 1-2 % for a wide range of attenuation coefficients values and for a large class of usual materials. 

Digitall Tomography

Dual-energy X-Ray Tomogram of a hand-held baggage containing various materials, including an organic material named threat simulant. The images reveals the tomogram of the baggage cross-section (top left), the corresponding Zeff map (top middle) and ? map (top right), and also the automate threat recognition map (bottom left).

Dual-energy X-Ray Tomogram of a hand-held baggage

Dual-energy X-Ray Tomogram of a hand-held baggage

Dual-energy X-Ray Tomogram of a hand-held baggage containing various materials, including an organic material named threat simulant. The images reveal the tomogram of the baggage cross-section (top left), the corresponding Zeff map (top middle) and ? map (top right), and also the automate threat recognition map (bottom left).    

High-accuracy local density measurements

The method is based on measurement of a thin beam X or Gamma ray radiation attenuation through investigated objects and could reveal up to 0.5% variation in local density values. The technique is destined for evaluation of the weak mechanical points of sintered items by high-accuracy local density measurements. Following a software-generated path the investigated objects is automated scanned and the weak values are measured and graphically represented on screen.     

X-Ray Multi-Energy, difraction and backscattering

Dual-energy X-Ray Tomogram of various materials usual found in the baggages

Dual-energy X-Ray Tomogram of various materials usual found in the baggages

Dual-energy X-Ray Tomogram of various materials usual found in the baggages, like soap, cheese, chocolate, toothpaste, deodorant together with threat simulant material. The graph reveals the standard tomogram image of the cross-section (top left), the corresponding Zeff map image (top middle), the ρ map image (top right) and the automate threat recognition image (bottom left). Despite the small differences between materials' Zeff and ρ values, the threat material still could be clearly detected.  

Non-Destructive Testing and Evaluation

Starting from the initially evaluation of the best suitable NDT method for the customer's products test and control, we are designing and developing a dedicated computerized control system for solving the customers' day-by-day production NDT problems. Our field of expertise is covering many domains, like: Industrial X and/or Gamma Ray Tomography, Digital radioscopy, Ultrasound technology, Acoustic Emission, Vibration Monitoring, Local density measurement, etc. Those domains are not limited, we can easily integrate in our design other NDT methods and equipments, in order to fulfill the entire customer specifications.