Digital radiography. A comparison with modern conventional imaging

X-ray film is a starting point for diagnosing various clinical conditions; the obvious advantages are easy availability, low cost, non-invasive, familiar to medical professionals, relatively harmless, and fast It is imaging time. It's easy to understand the important role of x-rays in medical screening, combining excellent resolution and contrast.

Traditional radiography (also known as SFR) is more widely used than digital radiography, but this advantage is decreasing rapidly. The reasons for the reduction in SFR penetration are - fixed dose range, fixed nonlinear grayscale response, and the possibility to reduce patient dose is limited. All of these parameters restrict the information that can be incorporated into the film. Once the image is processed, the image can not change the contrast. In addition, the film is expensive, processed using hazardous materials, labor intensive, and it is difficult to store and collect films for a long period of time. SFR is incompatible with Image Storage and Communication System (PACS).

Digital radiography (DR) has been further developed in various forms. In computer radiography (CR), light activated fluorescent panels, rather than conventional film screens, are used to detect x-rays. The exposed plate is scanned with a HeNe laser and the emitted light is converted to an analog electrical system which is captured by a photomultiplier and then digitized. Another form of DR is direct radiography, where a semiconductor-based sensor directly converts X-ray energy into an electrical signal, thereby eliminating the intermediate stages between the latent image and the image plate reader. Solid state detectors (toner cartridges) and flat panel detectors (selenium and cesium iodide) are used as scintillators, which convert X-ray photons to light and convert them to electrons through amorphous silica arranged as phototransistors . Image enhancement for real-time images uses a digital sensor connected to a video monitor, which is useful for screening during radiation, blood vessels and orthopedic surgery. You can raise the brightness up to 6000 times without increasing radiation dose.

Digital radiography is an integral part of dentistry. Digital radiography does not require film or darkroom, reduces x-ray doses, and immediately produces images. Our research aims to compare the subjective image quality of the two digital dental radiography systems with the conventional dental film. We have selected Sirona's Direct Digital (DD) "Digital" system, Vista-scan's Semi-Direct (SD) digital system, and Kodak's "E" Speed ​​Dental X-ray film for this research. In this study pulp-treated extract (n = 25) was used. Details of enamel, dentin, dentin-enamel junction, root canal filling (dental tip) and simulated apical pathology were investigated using three X-ray imaging systems. Statistical analysis of data to clarify the difference in subjective image quality

Subjective image quality comparison between two digital dental radiography systems and traditional dental films

X-rays were discovered by Wilhelm Roentgen in 1895. Since introduction in the mid 1980's, digital radiology replaced traditional screen film. Digital imaging uses a solid-state sensor, presents information using a computer, and saves it as an image. The arrival of the digital era of dental radiography was the first digital radiography system introduced in 1987 called Radio Visual Graphics (RVG) sponsored by Dr. Francis Mouyen. Physicists and charge coupled device (CCD) image sensor design engineer Paul Suni developed the CCD image sensor technology to realize the RVG digital radiography system. The main factor distinguishing digital systems from traditional systems is their response to incident radiation. The imaging system operates between a completely bright and completely dark series of images. The digital detector has a dynamic range of about 400 times the film screen.

Digital radiography has been used in the dental field for over 25 years, but it does not completely replace conventional film-based radiography. This may be due to the cost of replacing traditional radiography equipment with digital imaging systems or a little courage to implement new technology in dental practice. When a doctor is fully aware of the new possibilities brought about by digital radiography, he or she can make more informed decisions to adopt it. This article provides information on digital radiography as well as traditional radiography, as well as traditional radiography.