What makes the Vidisco flat panels so unique?

Vidisco’s flat panels offer a unique synergy of capabilities unavailable in similar products on the market.

Vidisco’s flat panel systems come equipped with the smart Imager Control Unit (ICU), which controls the DDA in the field. This enables the provision of hours of battery operation, sending power and data down a single thin cable. The ICU also contains built-in wireless devices (for communication & control of the X-ray source).

Comparable medical DDAs currently offered on the market cannot survive the harsh environment outside the sterile labs. They are able to maintain only a very short lifetime due to the high energies and dose levels used in industrial radiography.

How quickly can the Vidisco X-ray system be set up and operational?

An experienced user can set up any Vidisco portable digital X-ray system in less than 2 minutes. Following the short set up process, it is possible to immediately acquire endless numbers of images using the internal battery or external power (AC).

What is the main advantage of having a DR system as compared to CR (Computed Radiography) film plates?

CR is similar to film in terms of the process necessary to acquire an image; while the developing process has been eliminated, in the case of CR it has been replaced by a scanning and erasing process which takes time as well. DR produces almost instantaneous images; the only time needed to acquire the image is the transmission time from the DDA to the laptop (±3seconds). After this, the DDA is ready for the next “shot.”

Research indicates that in the thin materials range, CR can produce images of similar quality to DR.  As the thickness of the inspected objects increases, the SNR and the dynamic range of CR both decrease dramatically causing reduction of sensitivity and contrast. Although CR is based on multi-use plates it still a consumable which rarely reaches the declared “lifetime” (number of images it will produce throughout its existence). 


Is it possible to X-ray a pipe if the panel is not rounded or flexible?

Yes, it is possible, and with ease. Working in a similar set up to film, the fact that the panel is not flexible has absolutely no effect on image quality. When compared to film, in the majority of cases, a similar number of shots will be required with DR as while using a non-flexible imager. 

What is averaging and how can it improve the X-ray image quality?

Averaging is a technique that combines at least two or more images by averaging their values at every pixel. The result is a “cleaner” image due to a reduction of noise (which is random) and an increased SNR level. 

Averaging can be implemented during the calibration process as well as during the actual inspection. In both cases the result is similar – a better image quality. Vidisco’s XbitPro software offers a user-friendly, fully automated averaging tool.

What is “noise” and how does it affect the quality of the X-ray image? What can be done to minimize noise?

In analog and digital communications Noise is a “disturbance” which negatively affects the output of an electronic device (sound, image, video etc). Noise is caused by various factors some of which are internal (e.g., electronic noise which originates from the device’s own electronic components) and some of which are external (e.g., radio transmissions from the nearby environment, electrical fields, radiation scatter, etc).

In order to quantify noise, the term SNR (Signal to Noise Ratio) was created. SNR is a measure of signal strength relative to background noise and is influenced by many factors, including the radiation dose and the entire system’s properties. Generally speaking, the higher the SNR, the better image quality.  In digital X-ray, the noise factor can be reduced by using two tools – Averaging (frame integration) and high-quality Calibration through an automated process.

What changes will need to be made if I switch from film to Digital Radiography (DR)?

Most of the set up and the parameters are similar to those used in film. The main elements that change are the exposure time (which will be reduced dramatically) and the density element: Instead of measuring density, as you did with film, you will be measuring Grey Levels.

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