Computed tomography with monochromatic bremsstrahlung radiation
The use of filters with appropriate thickness of different elements produces a method to quasi-monochromatize X-ray beams. In the present study the filters were produced in a boric acid matrix, using the elements Mo, Sb, Cs, Ce and Gd. The thickness of the filters varied from 50 to 300 μm for a high...
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| Published in: | Applied radiation and isotopes Vol. 53; no. 4; pp. 665 - 671 |
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01-10-2000
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| Abstract | The use of filters with appropriate thickness of different elements produces a method to quasi-monochromatize X-ray beams. In the present study the filters were produced in a boric acid matrix, using the elements Mo, Sb, Cs, Ce and Gd. The thickness of the filters varied from 50 to 300 μm for a high voltage tube operating from 30 to 70 kVp. The parameters analyzed were the beam resolution, measured by its FWHM as a function of filter thickness, and the reduction of beam intensity. The results show a comparison between conventional tomographies obtained with different filters and application in the technique of differential tomography, with double energy for identification of elements such as Zr, Nd, Ba and Sm. |
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| AbstractList | The use of filters with appropriate thickness of different elements produces a method to quasi-monochromatize X-ray beams. In the present study the filters were produced in a boric acid matrix, using the elements Mo, Sb, Cs, Ce and Gd. The thickness of the filters varied from 50 to 300 mu m for a high voltage tube operating from 30 to 70 kVp. The parameters analyzed were the beam resolution, measured by its FWHM as a function of filter thickness, and the reduction of beam intensity. The results show a comparison between conventional tomographies obtained with different filters and application in the technique of differential tomography, with double energy for identification of elements such as Zr, Nd, Ba and Sm. The use of filters with appropriate thickness of different elements produces a method to quasi-monochromatize X-ray beams. In the present study the filters were produced in a boric acid matrix, using the elements Mo, Sb, Cs, Ce and Gd. The thickness of the filters varied from 50 to 300 microm for a high voltage tube operating from 30 to 70 kVp. The parameters analyzed were the beam resolution, measured by its FWHM as a function of filter thickness, and the reduction of beam intensity. The results show a comparison between conventional tomographies obtained with different filters and application in the technique of differential tomography, with double energy for identification of elements such as Zr, Nd, Ba and Sm. The use of filters with appropriate thickness of different elements produces a method to quasi-monochromatize X-ray beams. In the present study the filters were produced in a boric acid matrix, using the elements Mo, Sb, Cs, Ce and Gd. The thickness of the filters varied from 50 to 300 μm for a high voltage tube operating from 30 to 70 kVp. The parameters analyzed were the beam resolution, measured by its FWHM as a function of filter thickness, and the reduction of beam intensity. The results show a comparison between conventional tomographies obtained with different filters and application in the technique of differential tomography, with double energy for identification of elements such as Zr, Nd, Ba and Sm. |
| Author | Costa, E.B de Jesus, E.F.O Lopes, R.T |
| Author_xml | – sequence: 1 givenname: R.T surname: Lopes fullname: Lopes, R.T email: ricardo@lin.ufrj.br organization: Laboratório de Instrumentação Nuclear, COPPE-UFRJ, P.O. Box 68509, 21945-970 Rio de Janeiro, Brazil – sequence: 2 givenname: E.B surname: Costa fullname: Costa, E.B organization: Depto. de Fı́sca e Matemática, UFRPe, Recife, Brazil – sequence: 3 givenname: E.F.O surname: de Jesus fullname: de Jesus, E.F.O organization: Laboratório de Instrumentação Nuclear, COPPE-UFRJ, P.O. Box 68509, 21945-970 Rio de Janeiro, Brazil |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/11003505$$D View this record in MEDLINE/PubMed |
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| Cites_doi | 10.1088/0031-9155/24/1/008 10.1118/1.594609 10.1118/1.596210 10.1016/0168-9002(87)90840-0 10.1088/0031-9155/28/3/003 10.1148/115.2.431 10.1016/0168-9002(88)90338-5 10.1007/BF02524689 |
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| References | Atkins, Fairchild, Robertson, Greenberg (BIB1) 1975; 115 Fryar, McCarthy, Fenelon (BIB3) 1988; A271 Sandborg, M., Carlsson, C.A., 1994. Med. Biol. Eng. Comp. 384. Herman (BIB4) 1979; 24 Fryar, McCarthy, Fenelon (BIB2) 1987; A259 Szulc, Judy (BIB7) 1979; 6 Jennings (BIB5) 1988; 15 Yamaguchi, Yamamoto, Terada, Akisada (BIB8) 1983; 28 Herman (10.1016/S0969-8043(00)00202-5_BIB4) 1979; 24 10.1016/S0969-8043(00)00202-5_BIB6 Atkins (10.1016/S0969-8043(00)00202-5_BIB1) 1975; 115 Jennings (10.1016/S0969-8043(00)00202-5_BIB5) 1988; 15 Szulc (10.1016/S0969-8043(00)00202-5_BIB7) 1979; 6 Yamaguchi (10.1016/S0969-8043(00)00202-5_BIB8) 1983; 28 Fryar (10.1016/S0969-8043(00)00202-5_BIB2) 1987; A259 Fryar (10.1016/S0969-8043(00)00202-5_BIB3) 1988; A271 |
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| Title | Computed tomography with monochromatic bremsstrahlung radiation |
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