2005 IEEE Engineering in Medicine and Biology 27th Annual Conference 2005
DOI: 10.1109/iembs.2005.1616811
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Cone beam X-ray scatter removal via image frequency modulation and filtering

Abstract: We have verified the theoretical validity of scatter removal via spatial frequency modulation. A disadvantage of the technique is that it will always produce a filtered image having at best 0.41 of the maximum detector resolution when maximum scatter rejection is desired. This is not a major consideration in most medical X-ray CB imaging applications using contemporary detector technology, especially since scatter often significantly reduces useful resolution.

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Cited by 25 publications
(17 citation statements)
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“…The measured signal was then extended to the entire projection plane via interpolation (Yan et al , 2010). A primary modulation method (Bani-Hashemi et al , 2005; Maltz et al , 2006; Zhu et al , 2006; Gao et al , 2010) was developed to extract the low-frequency scatter signal from the Fourier domain. However, these methods generally require extra hardware, which hinders their practicality.…”
Section: Introductionmentioning
confidence: 99%
“…The measured signal was then extended to the entire projection plane via interpolation (Yan et al , 2010). A primary modulation method (Bani-Hashemi et al , 2005; Maltz et al , 2006; Zhu et al , 2006; Gao et al , 2010) was developed to extract the low-frequency scatter signal from the Fourier domain. However, these methods generally require extra hardware, which hinders their practicality.…”
Section: Introductionmentioning
confidence: 99%
“…Recently, many methods of scatter reduction and compensation for CT have been proposed, which could be summarized as hardware methods [7][8][9], software methods [10][11][12][13] and hybrid methods [3,[14][15][16][17][18]. Hardware methods are based on simplified equipments set up on CT, for example, X-ray beam collimator and beam metal filter.…”
Section: Introductionmentioning
confidence: 99%
“…Most scatter correction methods can be categorized as being based either on estimating scatter using computational models [6][7][8][9][10][11][12][13][14] or measuring scatter in situ. [15][16][17][18][19][20] Methods for measuring scatter in situ include collimator shadowing, 15 beam stop arrays, 16 dual scans, 17,18 and primary beam modulation. 19,20 While these techniques can be very accurate, they may also have practical limitations such as requiring extra imaging time, additional hardware, reducing the fieldof-view ͑FOV͒, or being susceptible to patient motion and mechanical instabilities.…”
Section: Introductionmentioning
confidence: 99%
“…[15][16][17][18][19][20] Methods for measuring scatter in situ include collimator shadowing, 15 beam stop arrays, 16 dual scans, 17,18 and primary beam modulation. 19,20 While these techniques can be very accurate, they may also have practical limitations such as requiring extra imaging time, additional hardware, reducing the fieldof-view ͑FOV͒, or being susceptible to patient motion and mechanical instabilities. Hence, the trend remains toward using computational methods.…”
Section: Introductionmentioning
confidence: 99%