Computed Radiography (CR) is a system by which reusable phosphor plates are exposed to X-rays and processed by a reader to create digital X-ray images.

CR has replaced film in radiographic imaging and is capable of higher resolution images than amorphous silicon panels can produce. The reusable phosphor plates are erased using visible light.

PixelRay is an advanced digital imaging system that captures X-ray images with grayscales up to 16 bits per pixel (BPP) (depending on the spatial resolution that the user has selected). It has a versatile interface that allows image capture, review and enhancement to solve a variety of image digitization problems. Its many built-in video tutorials and wizards help the user to learn the software.

Different readers allow the selection of different pixel spatial resolutions. A common resolution is 100 micrometer (µm) per pixel, or about 254 pixels per inch, or 5 line pairs per millimeter (lpmm).

The maximum commonly used spatial resolution is about 50 µm per pixel. With different readers and screens, resolutions of 25 µm or better are possible.

The spot size of the scanning laser is different for different readers. For example, ScanX Discover HC is ~50 µm, and ScanX Discover HR is ~14 µm.

Each scanned image has a user selected spatial resolution of between 12 and 16 bits per pixel (bpp) of grayscale information. For example, the ScanX Discover HC and HR can be set to 16 bpp @ 67µm, 15.6 bpp @ 50µm, or 14.6 bpp @ 25µm. Note that the true pixel resolution is also dependent on factors such as the phosphor imaging plate that is selected, the X-ray source spot size, and the geometry of the imaging setup.

Fisica has scanned screens that are over 100” long. The minimum bend radius is about 3” (screen dependent). Screens can be reused over 1,000 times if they are properly cared for.

The scan speed is dependent on the spatial resolution that was chosen by the user.