Dalsa Rad-icon 1520 User Manual
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Contents
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Rad-icon 1520 GigE User Manual 7Teledyne DALSADetector MaintenanceBefore performing any of the following operations, make sure that the power to thedetector is switched OFF.Protecting the Detector Front CoverThe front cover of the detector and should be treated with care, as scratches or debris inthis area may produce artifacts in the X-ray image.Cleaning the Detector Body and Front CoverThe detector body and front cover can be cleaned with a mild, non-abrasive cleanser suchas isopropyl alcohol. Place a small amount of cleanser on a soft cloth and rub gently overthe detector body surface. Wipe off with a clean soft cloth. Do not use any harsh cleansersor solvents that may damage the paint or other finishes on the detector.In the event of detector exposure to bio-hazardous materials, proper cleaning proceduresshould be undertaken prior to removal or maintenance of the detector.CalibrationTo have the best image performance, the raw image data generated by the detectorshould be corrected at the host by using a flat field (offset and gain) correction. As theoffset (dark) calibration signal depends (amongst others) on ambient temperatureconditions of the detector, it is commonly accepted good practice to generate thesecalibration images frequently at times that the X-ray source is switched off. It isrecommended to re-calibrate the gain correction image at least once per year, orwhenever the X-ray tube is exchanged or anything changes in the X-ray imaginggeometry (e.g. the distance between the X-ray source and the detector).The detector can contain deviating pixels. To have the best possible image quality it isadvised to perform a defect pixel correction in the host system. It is recommended tocreate a defect pixel calibration map at least once every year, or more frequently in case ofheavy use.To verify if the detector still operates according specification it is advised to measure onregular base the following performance parameters of the detector: dark reference, noiseperformance, flatfield reference, saturation dose and MTF performance. |
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