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Accelerated Compressed Sensing Based CT Image Reconstruction
المؤلفون المشاركون
Hashemi, SayedMasoud
Gill, Patrick R.
Paul, Narinder S.
Cobbold, Richard S. C.
Beheshti, S.
المصدر
Computational and Mathematical Methods in Medicine
العدد
المجلد 2015، العدد 2015 (31 ديسمبر/كانون الأول 2015)، ص ص. 1-16، 16ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2015-06-18
دولة النشر
مصر
عدد الصفحات
16
التخصصات الرئيسية
الملخص EN
In X-ray computed tomography (CT) an important objective is to reduce the radiation dose without significantly degrading the image quality.
Compressed sensing (CS) enables the radiation dose to be reduced by producing diagnostic images from a limited number of projections.
However, conventional CS-based algorithms are computationally intensive and time-consuming.
We propose a new algorithm that accelerates the CS-based reconstruction by using a fast pseudopolar Fourier based Radon transform and rebinning the diverging fan beams to parallel beams.
The reconstruction process is analyzed using a maximum-a-posterior approach, which is transformed into a weighted CS problem.
The weights involved in the proposed model are calculated based on the statistical characteristics of the reconstruction process, which is formulated in terms of the measurement noise and rebinning interpolation error.
Therefore, the proposed method not only accelerates the reconstruction, but also removes the rebinning and interpolation errors.
Simulation results are shown for phantoms and a patient.
For example, a 512 × 512 Shepp-Logan phantom when reconstructed from 128 rebinned projections using a conventional CS method had 10% error, whereas with the proposed method the reconstruction error was less than 1%.
Moreover, computation times of less than 30 sec were obtained using a standard desktop computer without numerical optimization.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Hashemi, SayedMasoud& Beheshti, S.& Gill, Patrick R.& Paul, Narinder S.& Cobbold, Richard S. C.. 2015. Accelerated Compressed Sensing Based CT Image Reconstruction. Computational and Mathematical Methods in Medicine،Vol. 2015, no. 2015, pp.1-16.
https://search.emarefa.net/detail/BIM-1057816
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Hashemi, SayedMasoud…[et al.]. Accelerated Compressed Sensing Based CT Image Reconstruction. Computational and Mathematical Methods in Medicine No. 2015 (2015), pp.1-16.
https://search.emarefa.net/detail/BIM-1057816
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Hashemi, SayedMasoud& Beheshti, S.& Gill, Patrick R.& Paul, Narinder S.& Cobbold, Richard S. C.. Accelerated Compressed Sensing Based CT Image Reconstruction. Computational and Mathematical Methods in Medicine. 2015. Vol. 2015, no. 2015, pp.1-16.
https://search.emarefa.net/detail/BIM-1057816
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1057816
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