Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
The amount of data generated by CT scanners is enormous, making the reconstruction operation slow, especially for 3-D and limited-data scans requiring iterative algorithms. The Radon transform and its inverse, commonly used for CT image reconstruction from projections, are computationally burdensome for today's single-processor computer architectures. If the processing times for the forward and inverse Radon transforms were comparatively small, a large set of new CT algorithms would become feasible, especially those for 3-D and iterative tomographic image reconstructions. In addition to image reconstruction, a fast Radon Transform Computer'' could be naturally applied in other areas of multidimensional signal processing including 2-D power spectrum estimation, modeling of human perception, Hough transforms, image representation, synthetic aperture radar processing, and others. A high speed processor for this operation is likely to motivate new algorithms for general multidimensional signal processing using the Radon transform. In the proposed workshop paper, we will first describe interpolation schemes useful in computation of the discrete Radon transform and backprojection and compare their errors and hardware complexities. We then will evaluate through statistical means the fixed-point number system required to accept and generate 12-bit input and output data with acceptable error using the linear interpolation scheme selected. These results set some of the requirements that must be met by our new VLSI chip architecture. Finally we will present a new unified architecture for a single-chip processor for computing both the forward Radon transform and backprojection at high data rates. 3 refs., 2 figs.
A Pipelined IC Architecture for Radon Transform Computations in a Multiprocessor Array
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
The amount of data generated by CT scanners is enormous, making the reconstruction operation slow, especially for 3-D and limited-data scans requiring iterative algorithms. The Radon transform and its inverse, commonly used for CT image reconstruction from projections, are computationally burdensome for today's single-processor computer architectures. If the processing times for the forward and inverse Radon transforms were comparatively small, a large set of new CT algorithms would become feasible, especially those for 3-D and iterative tomographic image reconstructions. In addition to image reconstruction, a fast Radon Transform Computer'' could be naturally applied in other areas of multidimensional signal processing including 2-D power spectrum estimation, modeling of human perception, Hough transforms, image representation, synthetic aperture radar processing, and others. A high speed processor for this operation is likely to motivate new algorithms for general multidimensional signal processing using the Radon transform. In the proposed workshop paper, we will first describe interpolation schemes useful in computation of the discrete Radon transform and backprojection and compare their errors and hardware complexities. We then will evaluate through statistical means the fixed-point number system required to accept and generate 12-bit input and output data with acceptable error using the linear interpolation scheme selected. These results set some of the requirements that must be met by our new VLSI chip architecture. Finally we will present a new unified architecture for a single-chip processor for computing both the forward Radon transform and backprojection at high data rates. 3 refs., 2 figs.
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
The amount of data generated by CT scanners is enormous, making the reconstruction operation slow, especially for 3-D and limited-data scans requiring iterative algorithms. The Radon transform and its inverse, commonly used for CT image reconstruction from projections, are computationally burdensome for today's single-processor computer architectures. If the processing times for the forward and inverse Radon transforms were comparatively small, a large set of new CT algorithms would become feasible, especially those for 3-D and iterative tomographic image reconstructions. In addition to image reconstruction, a fast Radon Transform Computer'' could be naturally applied in other areas of multidimensional signal processing including 2-D power spectrum estimation, modeling of human perception, Hough transforms, image representation, synthetic aperture radar processing, and others. A high speed processor for this operation is likely to motivate new algorithms for general multidimensional signal processing using the Radon transform. In the proposed workshop paper, we will first describe interpolation schemes useful in computation of the discrete Radon transform and backprojection and compare their errors and hardware complexities. We then will evaluate through statistical means the fixed-point number system required to accept and generate 12-bit input and output data with acceptable error using the linear interpolation scheme selected. These results set some of the requirements that must be met by our new VLSI chip architecture. Finally we will present a new unified architecture for a single-chip processor for computing both the forward Radon transform and backprojection at high data rates. 3 refs., 2 figs.
VLSI Signal Processing, IV
Author: Howard S. Moscovitz
Publisher: Institute of Electrical & Electronics Engineers(IEEE)
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 492
Book Description
Publisher: Institute of Electrical & Electronics Engineers(IEEE)
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 492
Book Description
Energy Research Abstracts
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 678
Book Description
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 678
Book Description
Eleventh International Parallel Processing Symposium
Author: IEEE Computer Society. Technical Committee on Parallel Processing
Publisher: Institute of Electrical & Electronics Engineers(IEEE)
ISBN: 9780818677922
Category : Computers
Languages : en
Pages : 798
Book Description
Proceedings -- Parallel Computing.
Publisher: Institute of Electrical & Electronics Engineers(IEEE)
ISBN: 9780818677922
Category : Computers
Languages : en
Pages : 798
Book Description
Proceedings -- Parallel Computing.
Architectures and Techniques for Fast Computed Tomography
Author: Iskender Agi
Publisher:
ISBN:
Category :
Languages : en
Pages : 364
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 364
Book Description
ICASSP 90
Author:
Publisher:
ISBN:
Category : Electro-acoustics
Languages : en
Pages : 582
Book Description
Publisher:
ISBN:
Category : Electro-acoustics
Languages : en
Pages : 582
Book Description
Design and Implementation of a Digital Signal Multiprocessor for Computation of the Radon Transform
Author: Eric Shieh
Publisher:
ISBN:
Category :
Languages : en
Pages : 112
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 112
Book Description
Government Reports Annual Index
Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1096
Book Description
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1096
Book Description
Science Abstracts
Author:
Publisher:
ISBN:
Category : Electrical engineering
Languages : en
Pages : 1360
Book Description
Publisher:
ISBN:
Category : Electrical engineering
Languages : en
Pages : 1360
Book Description
Government Reports Announcements & Index
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 722
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 722
Book Description