Digital Detector Array Image Quality for Various GOS Scintillators

Digital detector arrays (DDAs) are becoming more prevalent for industrial radiographic inspection. The type of scintillator used with a DDA determines the overall achievable image quality. DRZ High, DRZ Plus, DRZ Standard, and DRZ Fine gadolinium oxysulfide terbium (GOS: Tb) activated scintillators were investigated in combination with the Carestream DRX PLUS digital detector array panel. Three beam conditions were utilized for exposure: RQA-5 (70 kVp, 21 mm aluminum), RQA-9 (120 kVp, 1 mm copper and 4 mm aluminum), and NDT (220 kVp, 8 mm copper). The detective quantum efficiency (DQE), modulation transfer function (MTF), sensitivity, and interpolated basic spatial resolution (iSRb) were determined for each scintillator and beam condition. The results of this investigation are presented in this paper.

References

ASTM 2736, “Standard Guide for Digital Detector Array Radiography,” ASTM International. 

ASTM E2698, “Standard Practice for Radiological Examination Using Digital Detector Arrays,” ASTM 

International. 

ASTM 2737, “Standard Practice for Digital Detector Array Performance Evaluation and Long-Term Stability,” 

ASTM International. 

ASTM 2597, “Standard Practice for Manufacturing Characterization of Digital Detector Arrays,” ASTM 

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Dainty, J. C. and Shaw, R., Image Science: Principles, Analysis and Evaluation of Photographic Type Imaging 

Processes, Academic Press, New York, NY, 1974. 

ASTM E2002, “Standard Practice for Determining Total Image Unsharpness and Basic Spatial Resolution in Radiography,” ASTM International. 

 

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