A Flat-Panel X-Ray Imaging Module for Medical Imaging and Nondestructive Testing


Article Preview

In this study, we designed a flat-panel digital X-ray imaging module based upon the amorphous silicon (a-Si) technology and tested potential for medical imaging and nondestructive testing. The module employs a commercially available a-Si photosensor array of a 143 μm x 143 μm pixel size and a 42.9 cm x 42.9 cm active area, coupled with a CsI(Tl) scintillator of a 550 μm thickness, and a readout IC board which can be accessed through our home made GUI software. The experimental test was performed to evaluate the system response with exposure, modulation transfer function (MTF), noise power spectrum (NPS), and detective quantum efficiency (DQE).



Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi




H. S. Cho et al., "A Flat-Panel X-Ray Imaging Module for Medical Imaging and Nondestructive Testing", Key Engineering Materials, Vols. 321-323, pp. 1004-1007, 2006

Online since:

October 2006




[1] J. H. Siewerdsen, L. E. Antonuk, and J. Yorkston, Theoretical performance of amorphous silicon imagers in diagnostic radiology, Proc. SPIE 2708, pp.484-493 (1996).

DOI: https://doi.org/10.1117/12.237810

[2] M. P. Andre, B. Spivey, P. Martin, L. Morsell, E. Atlas, and T. Pellegrino, An integrated CMOS-selenium X-ray detector for digital mammography, Proc. SPIE 3336, pp.204-209 (1998).

[3] A. Karellas, L. J. Harris, H. Liu, M. A. Davis, and C. J. D'Orsi, Charge-coupled device detector: Performance considerations and potential for small-field mammographic imaging applications, Med. Phys. 19, pp.1015-1023 (1992).

DOI: https://doi.org/10.1118/1.596819

[4] H. Roehrig, L. L. Fajardo, T. Yu, and W. S. Schempp, Signal, noise and detective quantum efficiency in CCD based X-ray imaging systems for use in mammography, Proc. SPIE 2163, pp.320-332 (1994).

DOI: https://doi.org/10.1117/12.174269

[5] Ehsan Samei and Michael J. Flynn, An experimental comparison of detector performance for computed radiography systems, Med. Phys, Vol. 29, pp.447-459 (2002).

DOI: https://doi.org/10.1118/1.1449873

[6] Ehsan Samei, Michael J. Flynn, Harrell G. Chotas, Jamse T. Dobbins, III, DQE of direct and indirect digital radiographic systems, Proc. SPIE 4320, pp.189-197 (2001).

DOI: https://doi.org/10.1117/12.430953