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Volume 28 (2024)
Volume 28,
Pg 1 - 28 (December 2024)
Volume 27 (2023)
Volume 27,
Pg 1 - 76 (December 2023)
Volume 26 (2022)
Volume 26,
Pg 1 - 32 (December 2022)
Volume 25 (2022)
Volume 25,
Pg 1 - 36 (June 2022)
Volume 24 (2021)
Volume 24, Issue 2
Pg 81 - 108 (December 2021)
Volume 24, Issue 1
Pg 1 - 80 (June 2021)
Volume 23 (2020)
Volume 23, Issue 2
Pg 61 - 102 (December 2020)
Volume 23, Issue 1
Pg 1 - 59 (June 2020)
Volume 22 (2019)
Volume 22, Issue 1-2
Pg 1 - 38 (November 2019)
Volume 21 (2019)
Volume 21, Issue 1-2
Pg 1 - 65 (August 2019)
Volume 20 (2019)
Volume 20, Issue 2
Pg 87 - 133 (May 2019)
Volume 20, Issue 1
Pg 1 - 85 (April 2019)
Volume 19 (2019)
Volume 19, Issue 2
Pg 119 - 202 (February 2019)
Volume 19, Issue 1
Pg 1 - 118 (January 2019)
Volume 18 (2018)
Volume 18, Issue 8
Pg 1151 - 1269 (November 2018)
Volume 18, Issue 7
Pg 981 - 1149 (October 2018)
Volume 18, Issue 6
Pg 809 - 979 (August 2018)
Volume 18, Issue 5
Pg 631 - 807 (July 2018)
Volume 18, Issue 4
Pg 489 - 629 (May 2018)
Volume 18, Issue 3
Pg 357 - 487 (April 2018)
Volume 18, Issue 2
Pg 207 - 356 (February 2018)
Volume 18, Issue 1
Pg 1 - 205 (January 2018)
Volume 17 (2017)
Volume 17, Issue 6
Pg 1299 - 1640 (December 2017)
Volume 17, Issue 5
Pg 923 - 1298 (October 2017)
Volume 17, Issue 4
Pg 719 - 921 (August 2017)
Volume 17, Issue 3
Pg 517 - 717 (June 2017)
Volume 17, Issue 2
Pg 229 - 516 (April 2017)
Volume 17, Issue 1
Pg 1 - 228 (February 2017)
Special Volume 3 (2016)
Special Volume 3, ICCS - 2016, Part II
Pg 273 - 850 (November 2016)
Special Volume 3, ICCS - 2016, Part I
Pg 1 - 272 (October 2016)
Special Volume 2 (2016)
Special Volume 2, ICACCI-2016, Cebu, Philippines
Pg 1 - 170 (September 2016)
Volume 16 (2016)
Volume 16, Issue 4
Pg 745 - 1017 (December 2016)
Volume 16, Issue 3
Pg 471 - 744 (September 2016)
Volume 16, Issue 2
Pg 203 - 469 (June 2016)
Volume 16, Issue 1
Pg 1 - 201 (March 2016)
Special Volume 1 (2016)
Special Volume 1, SASTRA Nat. Conf. Elec. Sci. Tech., INDIA, 2015
Pg 1 - 227 (March 2016)
Volume 15 (2015)
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Pg 85 - 170 (December 2015)
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Pg 1 - 84 (September 2015)
Volume 14 (2015)
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Pg 81 - 159 (June 2015)
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Pg 1 - 79 (March 2015)
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Pg 79 - 154 (December 2014)
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Pg 1 - 78 (September 2014)
Volume 12 (2014)
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Pg 65 - 143 (June 2014)
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Pg 1 - 64 (March 2014)
Volume 11 (2013)
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Pg 67 - 142 (December 2013)
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Pg 1 - 66 (September 2013)
Volume 10 (2013)
Volume 10, Issue 2
Pg 73 - 139 (June 2013)
Volume 10, Issue 1
Pg 1 - 71 (March 2013)
Volume 9 (2012)
Volume 9, Issue 2
Pg 69 - 120 (December 2012)
Volume 9, Issue 1
Pg 1 - 68 (September 2012)
Volume 8 (2012)
Volume 8, Issue 2
Pg 69 - 134 (June 2012)
Volume 8, Issue 1
Pg 1 - 67 (March 2012)
Volume 7 (2011)
Volume 7, Issue 2
Pg 67 - 123 (December 2011)
Volume 7, Issue 1
Pg 1 - 65 (September 2011)
Volume 6 (2011)
Volume 6, Issue 2
Pg 61 - 127 (June 2011)
Volume 6, Issue 1
Pg 1 - 59 (March 2011)
Volume 5 (2010)
Volume 5, Issue 2
Pg 67 - 129 (December 2010)
Volume 5, Issue 1
Pg 1 - 65 (September 2010)
Volume 4 (2010)
Volume 4, Issue 2
Pg 91 - 170 (June 2010)
Volume 4, Issue 1
Pg 1 - 89 (March 2010)
Volume 3 (2009)
Volume 3, Issue 3
Pg 167 - 259 (December 2009)
Volume 3, Issue 2
Pg 85 - 165 (August 2009)
Volume 3, Issue 1
Pg 1 - 84 (April 2009)
Volume 2 (2008)
Volume 2, Issue 3
Pg 195 - 266 (December 2008)
Volume 2, Issue 2
Pg 99 - 193 (August 2008)
Volume 2, Issue 1
Pg 1 - 98 (April 2008)
Volume 1 (2007)
Volume 1, Issue 3
Pg 189 - 267 (December 2007)
Volume 1, Issue 2
Pg 109 - 187 (August 2007)
Volume 1, Issue 1
Pg 1 - 108 (April 2007)
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Computer Science and Artificial Intelligence
Engineering and Sciences
Materials Engineering
Mathematics and Statistics
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All future articles and volumes will be published
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on our new website:
pphmjopenaccess.com
. Authors are requested to submit their papers through the new website only.
Visit now:
pphmjopenaccess.com
Far East Journal of Electronics and Communications
Far East Journal of Electronics and Communications
Volume 6, Issue 1, Pages 13 - 25 (March 2011)
IMPLEMENTATION OF CONTINUOUS-TIME IMAGE RECONSTRUCTION SYSTEM IN ANALOG ELECTRONIC CIRCUIT
Ken’ichi Fujimoto, Omar M. Abou Al-Ola and Tetsuya Yoshinaga
Abstract:
As techniques for medical image reconstruction in computed tomography (CT), filtered back projection (FBP) methods and iterative methods are well known. Compared with the FBP method, which is a transform method, iterative methods have the advantage that they can produce acceptable quality images even from noise-added and/or lacked projections. The FBP method implemented in customized hardware, however, is widely used because of its high speed for reconstructing an image. As a novel image reconstruction scheme, we have developed an approach using continuous-time image reconstruction (CIR) described by ordinary differential equations. Our CIR system could reconstruct images with almost the same quality as those of iterative methods without production of negative pixel values. Moreover, our system described by ordinary differential equations could be implemented in hardware as an analog electronic circuit, i.e., it provided fast image reconstruction. In this paper, as the first stage toward the practical use of our CIR system, we present a prototype consisting of an analog electronic circuit for reconstructing an image with several pixels from projection data. Our prototype circuit is mainly composed of integrators, multipliers, and summations. The time constant of integrators can be set by arranging the values of passive circuit elements that are components of integrators. We show that our circuit work well when we compare our results to theoretical results, and it provides fast image reconstruction when we set the time constant of integrators to a small value.
Keywords and phrases:
computed tomography, image reconstruction, differential equation, continuous-time dynamical system, analog electronic circuit.
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