OrthoScan Mobile DI[kml_flashembed movie="/fdInfoVideo.swf" height="429" width="670"]
Digital diagnostic imaging and fluoroscopy
OrthoScan’s new mini c-arm with flat detector offers surgeons increased image quality, a smaller thin design, improved reliability, and more efficient imaging. Once again OrthoScan is setting the new standard in mini c-arm imaging.
How Flat Detectors Work
Digital devices are smaller and more robust. Just as digital technologies have dramatically improved home audio and video fidelity, digital X-ray technology offers significant improvement in image quality and dose utilization. Standard fluoroscopy is still primarily based on analog technology, specifically, the image intensifier. Flat detectors have emerged as the next generation of digital X-ray technology.
Current image intensifier based imaging has many stages in the signal conversion chain. These stages result in geometric distortion and brightness non-uniformity across the diameter of the image. In comparison, flat panels have a direct, short signal conversion path, with essentially no optics. The result is a flat, uniform image from edge to edge.
Flat detectors are based on solid-state integrated circuit technology. The two primary detector technologies considered for fluoroscopy are thin-film-transistors (TFT) and complementary metal oxide semiconductor (CMOS). OrthoScan chose to use CMOS technology because of its higher frame rate and low inherit visual noise in the signal. Typically TFT technology presents limitations when used in mobile fluoroscopy including limited frame rates and image lag (ghosting).
Flat Detector Equals Higher Efficiency
Flat detector technology makes more efficient use of the available radiation. Flat detectors read more of the individual x-rays, so in turn there is less waste. Detective Quantum Efficiency (DQE) is the yardstick by which the performance of imagers is measured. A higher DQE translates directly into better imager quality for a given dose.
- Resolution capability range: 2k x 1.5k
- Frames per second range: 30
- Viewing area: 167 cm2 (versus 165 cm2 II)
- Lack of geometric distortion
- Uniform response across the field of view
- No vignetting / veiling glare
- More x-ray information in the image
- Increased grayscale
- Small, thin design
- Improved maneuverability in the workspace
- Improved accessibility for imaging knees and feet
- Same SID – 14” FDA limit
- Solid state detector is more reliable than glass tube II
- No antiquated vacuum sealed II – no image degradation over time
- No power supply for receptor – reduced power draw
- No camera – auto-calibrating, self-adjusting image reader
- Fewer components – less chance of part failure
- Service life of a typical flat detector is significantly longer than an II