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What is DR?

Direct Radiography

DR stands for DIRECT RADIOGRAPHY and works with a cassette that is connected directly to a PC. It contains a TFT detector which will read the image itself. As a result, the image appears quasi automatically on the PC screen.


Brands differ with respect to the scintillator they use, and to resolution, sensitivity to radiation, noise, etc.


The best DR panel for SDA is the Fujifilm G35s. It has a 35 x 43 cm detection surface including cable.



Advantages & disadvantages of DR




ease of use

imaging quality

less radiation required

total cost



initial cost

ISS Technology

Excellent image quality with unequalled sharpness!


In converting X-ray to light, the scintillators used are either gadolinium (GOS) powder or caesium iodide (Csl) crystals. The light obtained is converted into a digital signal by means of a TFT detector.


Normally the TFT layer is placed behind the scintillator. Fujifilm has developed revolutionary and unique ISS (Irradiaton Side Sampling) technology whereby the TFT is in front instead of behind the scintillator.


The crystals have broader feet and finer ends. Consequently, the signal is more accurate at the ends than at the feet. That makes for a less diffusive signal and ensures excellent image quality and unsurpassed sharpness.



'Trigger free'

The Fujifilm DR system is the first of its kind not requiring a trigger box. Smart-switch technology ensures that the detector panel is always at the ready to receive and process radiation. Consequently, pressing the hand or foot switch does not create any delay. Gone are the days of frustration when a dog moves at the wrong moment while being X-rayed.


The classical DR X-ray system is slightly different in this respect. After all: it requires the detector's readiness for receiving and processing radiation. And that is just what the trigger box is for. It interrupts the signal from the hand or foot switch and transmits it, wirelessly or wired, to the control box or PC that controls the detector. The signal does not proceed until the PC gives permission. This can result in a delay of several seconds.


An additional advantage of the Fujifilm DR cassette is that it allows for the use of different X-ray tubes (e.g. one mobile tube and one extra heavy mounted tube for back pictures in horses, and a fixed one for small animals). By contrast, the classical DR panels require a different trigger box for each type of X-ray tube. The box has to be connected with each change to a different X-ray tube.


Additional advantage: Defect X-ray tubes can easily be replaced by another type!


Advantage 1: Image quality

The ISS (Irradiation Side Sampling) technology provides better sharpness and more detail than a CR device or competitive DR.


Furthermore, thanks to the expertise of the veterinarian surgeon and the IT skills available at Veterinary Solutions we were able to further optimise the image quality parameters.

Advantage 2: Speed gain

The X-ray machine operates with a foot pedal and the vet immediately sees the results on the screen, so there's no need to release the animal to develop the X-ray. New X-rays can be made every 8 to 9 seconds. Consequently, examinations for fractures, for instance, will take no more than 2 minutes. With a CR the procedure would take five times as long.


This means that X-ray exams can be carried out during a consultation without jeopardising the practice's entire planning. And the client will be happy with the speedy result.

Advantage 3: Compact

A FUJIFILM DR system hardly takes up any space as the cassette is located in the table and it does not require a trigger box (FUJIFILM was the first to make it superfluous) or control box. So what remains is a cable (hidden under the table) to a compact PC with a screen that can be placed against a wall. Even the smallest practices can use it!

Advantage 4: Less radiation required

The ISS technology specific to FUJIFILM has the big advantage of requiring less radiation than a CR device.


This means more safety for the user, but also cost savings as it requires a less powerful generator.

Advantage 5: Total cost

A DR device does not require any physical maintenance; after all, it does not contain any movable parts (contrary to a CR reader). In addition, its residual value will be higher compared to the somewhat outdated CR technology. Therefore, in the long term its total cost will not exceed the price of a CR device, especially if one takes account of the time savings.