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| The Application of Detective Quantum Efficient in Calibration of Digital Radiography |
| LU Xiang1,ZHANG Jun-yi2 |
1.Beijing Institute of Metrology, Beijing 100013
2.Direct Digital Imaging Technology(Beijing) Co Ltd, Beijing 100097 |
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Abstract The application of detective quantum efficient in calibration of digital radiography is described.Detective quantum efficient gives an indication of the system effectiveness in detecting X-ray beam and faithfully reproducing medical image by the flat panel detector,so the measurement of the detective quantum efficiency has been a link between X-ray beam and image reproduced by the flat panel detector.The experiment result has proved that some important performance about the flat panel detector of digital radiography can be found by the measurement of the detective quantum efficiency.
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［1］IEC 62220-1,Medical electrical equipment-Characteristics of digital X-ray imaging devices-Part 1:Determination of the detective quantum efficiency［S］. 2003.
［2］Samei E,et al.A method for measuring the presampled MTF of digital radiographic systems using an edge test device［J］. Med Phys, 1998, 25(1):102-113.
［3］Samei E,et al. DQE of direct and indirect digital radiographic systems［C］.Medical Imaging 2001: Physics of Medical Imaging. Proceedings of SPIE, 2001, 189-197.
［4］Samei E,et al .Intercomparison of methods for image quality characterization.I.modulation transfer function［J］. Med Phys, 2006, 33(5): 1454-1465. |
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2011, Vol. 32 
