Del Medical EPEX Omniflex IV, Service Manual

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Digital Signal A signal whose units are represented by either one of only two states, on
or off, yes or no, 1 or 0. Since no gradations in between are permitted,
digital signals are precise, unambiguous, and quite immune to noise.
Refer to Analog.
Direct Capture DirectRay technology is a direct conversion process because it directly
captures and converts X-ray energy into electrical signals. No
intensifying screens, intermediate steps, or additional processes are
required to capture and convert the incident X-ray energy. Conventional
screen-film, computed radiography, and most emerging flat panel image
capture systems are indirect because of their reliance on an
X-ray-to-light-to-signal process.
DirectRay (DR) Registered trademark name for the Direct Radiography Corp. DirectRay
Detector and DirectRay Controller.
DirectRay Console The DirectRay System component that houses the CPU (where the user
interface runs), the DirectRay Controller, and the uninterruptible power
supply (UPS). It also stores the DirectRay Console Application, the
user-interface for the system.
DirectRay Controller The interface between the DirectRay Detector and the DirectRay
Console controls.
DirectRay Detector The DirectRay Detector is a flat panel that receives the X-ray image and
converts it to digital information. The DirectRay Detector replaces
conventional X-ray film and cassettes.
Direct Radiography (DR) A term used to distinguish the use of a photoconductor-based method as
opposed to the X-ray capture and conversion method used in a
scintillator or phosphor-based detector.
Distortion Difference in size and/or shape of the radiographic image as compared
with that of the part examined.
Dose Amount of energy deposited in the body tissue because of radiation
exposure.
Dosimeter Device worn for the assessment of dose equivalence.
DQE Detective Quantum Efficiency.
DR Direct Radiography/DirectRay.
DRC DirectRay Console.
DRIVEL DirectRay Image Viewer.
DROC DirectRay Operator Console. This abbreviation appears on many of the
DirectRay Console application screens and in the Netscape Service
Tool.