Abstract
The scatter-to-primary ratio (SPR), can serve as an important parameter for performing the scatter correction procedures or build up factor determination in radiography projections. In this work an experimental technique is presented based on localized primary modulation for direct SPR measurement. As illustrative examples, the SPR is measured for steel and aluminum step wedges to demonstrate the applicability of the presented technique in computed radiography. As a required parameter, the effective transmission factor of the modulator is measured using primary beam stopping concept over a calibration block. This technique has significant advantages such as a straight forward theory, simplified applicability in industrial site conditions, beam hardening consideration as well as automation possibility. The technique works by a single image acquisition, without image data loss in the interested area.
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Rowlands, J.A.: The physics of computed radiography. Phys. Med. Biol. 47(23), R123–R166 (2002). https://doi.org/10.1088/0031-9155/47/23/201
Correa, S.C.A., Souza, E.M., Silva, A.X., Cassiano, D.H., Lopes, R.T.: Computed radiography simulation using the Monte Carlo code MCNPX. Appl. Radiat. Isot. 68(9), 1662–1670 (2010). https://doi.org/10.1016/j.apradiso.2010.02.011
Bushberg, J.T., Seibert, J.A., Leidholdt, E.M., Boone, J.M.: The Essential Physics of Medical Imaging, 2nd edn. Lippincott Williams & Wilkins, Philadelphia (2003)
Cooper, V.N., Boone, J.M., Seibert, J.A., Pellot-Barakat, C.J.: An edge spread technique for measurement of the scatter-to-primary ratio in mammography. Med. Phys. 27(5), 845–853 (2000). https://doi.org/10.1118/1.598950
Schörner, K., Goldammer, M., Stephan, J.: Comparison between beam-stop and beam-hole array scatter correction techniques for industrial X-ray cone-beam CT. Nucl. Instr. Method B 269(3), 292–299 (2011). https://doi.org/10.1016/j.nimb.2010.11.053
Maltz, J.S., Blanz, W.E., Hristov, D., Bani-Hashemi, A.: Cone beam X-ray scatter removal via image frequency modulation and filtering. In: IEEE Engineering in Medicine and Biology, 27th Annual Conference (2006). https://doi.org/10.1109/IEMBS.2005.1616811
Zhu, L., Bennett, N.R., Fahrig, R.: Scatter correction method for X-ray CT using primary modulation: theory and preliminary results. IEEE Trans. Med. Imaging 25, 1573–1587 (2006). https://doi.org/10.1109/TMI.2006.884636
Gao, H., Zhu, L., Fahrig, R.: Modulator design for x-ray scatter correction using primary modulation: material selection. Med. Phys. 37(8), 4029–4037 (2010). https://doi.org/10.1118/1.3457472
Zhu, L., StarLack, J., Bennett, N.R., Li, T., Xing, L., Fahrig, R.: Improved scatter correction for X-ray cone-beam CT using primary modulation. Proc. SPIE. (2007). https://doi.org/10.1117/12.713678
Ritschl, L., Fahrig, R., Knaup, M., Maier, J., Kachelrieß, M.: Robust primary modulation-based scatter estimation for cone-beam CT. Med. Phys. 42(1), 469–478 (2015). https://doi.org/10.1118/1.4903261
Schörner, K., Goldammer, M., Stephan, J.: Scatter correction by modulation of primary radiation in industrial X-ray CT: beam-hardening effects and their correction. In: International Symposium on Digital Industrial Radiology and Computed Tomography (2011)
Geng, P., Ten, F., Xiao, D., Kang, Y.: A new X-ray scatter correction method based on BAG for cone-beam CT. In: IEEE International Conference on Information and Automation, Shenyang. (2012). https://doi.org/10.1109/ICInfA.2012.6246827
Yan, H., Mou, X., Tang, Sh., Chen, X.: Iterative scatter correction for x-ray cone-beam CT with semi-transparent beam stop array. In: Medical Imaging, International Society for Optics and Photonics. (2009). https://doi.org/10.1117/12.812389
Kermani, A., Feghhi, S.A.H.: Scatter signal elimination by localized primary modulation in industrial computed radiography. J. Nondestruct. Eval. 36, 71 (2017)
Boone, J.M., Seibert, J.A.: Monte carlo simulation of the scattered radiation distribution in diagnostic radiology. Med. Phys. 15(5), 713–720 (1988). https://doi.org/10.1118/1.596185
Love, L.A., Kruger, R.A.: Scatter estimation for a digital radiographic system using convolution filtering. Med. Phys. 14(2), 178–185 (1987). https://doi.org/10.1118/1.596126
Seibert, J.A., Boone, J.M.: X-ray scatter removal by deconvolution. Med. Phys. 15(4), 567–575 (1988). https://doi.org/10.1118/1.596208
Report of AAPM Task Group 10: Acceptance testing and quality control of photostimulable storage phosphor imaging systems. American Association of Physicists in Medicine (2006)
Rokrok, B., Arezabak, B., Khodakarami, M., Kermani, A., Movafeghi, A.: Characteristic curves of phosphorous imaging plates in industrial digital radiography. In: IRNDT International Conference (2016)
Rokrok, B., Kermani, A.: Digital radiography image quality assessment of steel step wedge specimen. In: IRNDT International Conference (2016)
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Kermani, A., Feghhi, S.A.H. Experimental Measurement of Scatter to Primary Ratio by Localized Primary Modulation in Industrial Computed Radiography. J Nondestruct Eval 37, 9 (2018). https://doi.org/10.1007/s10921-018-0460-x
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DOI: https://doi.org/10.1007/s10921-018-0460-x