Digital Radiography CATEGORY DESCRIPTION
Digital radiography uses computer technology and digital receptors for the acquisition, viewing, enhancement, storage, and transfer of radiographic images. Radiation-sensitive detectors capture and convert the image into numeric data, and enable image display on a monitor. An x-ray machine that produces small increments of radiation, a computer and monitor (with appropriate hardware, software and printing capabilities), an analog-to-digital converter, and a digital sensor are required components for the technology.
In intraoral digital radiography, analog data are acquired by the receptor (direct, which communicates via cable with the computer; and indirect, which requires a scanning step) and converted to digital data by an analog-to-digital converter. These receptors are highly sensitive sensors that require considerably less radiation exposure than film. Extraoral digital images can also be acquired via direct or indirect digital imaging systems. Digital panoramic and cephalometric machines employ either linear array CCD or CMOS detectors, or PSP plate sensors.
In addition to the frequently cited radiation dose reduction, digital radiography affords additional benefits, including the ability to more quickly view images and to enhance them via computerized image processing to improve, correct, analyze or alter. Other benefits include ease of storage, retrieval, duplication and transmission; and elimination of chemical processing/handling/waste.
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