engleski

Comparison of Different Radiographic Image Receptors

The aim of this study is to compare detector plates (radiographic image receptors) used in digital radiology. Detector plates are divided into computed radiography systems (phosphor plates) and digital radiography systems (CCD, CMOS, silicon photodiodes and flat panel detector). Phosphor plates use the principle of radiation-induced photostimulable luminescence, and can be read with the help of a laser reader (digitizer). Digital radiology systems are divided into indirect and direct ; indirect are those that require the conversion of x-rays into photons of visible light and use scintillators for that matter, while direct x-rays are directly converted into charges with the use of photoconductors. Out of all the scintillators, cesium iodide has shown the best properties through research, while amorphous selenium proved to be the optimal photoconductor. CCD, CMOS and silicon photodiode are exclusively indirect digital detector systems, while flat panel detector can be found in both direct and indirect format. CCD slot scan detector system with full frame signal reading mode, active pixel CMOS detector, and silicon photodiode with back-illuminated PDA have shown the best results among detectors of their kind, while indirect type flat panel detectors with cesium iodide scintillator proved to be the optimal choice in modern radiography as evidenced by research with PBU-S-3, CDRAD 2.0 and TRG phantom.

computed radiography ; detector plates ; digital radiography ; photoconductors ; scintillators

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