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- Publications
- Influence

A two-step Hilbert transform method for 2D image reconstruction.

- F. Noo, R. Clackdoyle, J. Pack
- Medicine, Mathematics
- Physics in medicine and biology
- 7 September 2004

The paper describes a new accurate two-dimensional (2D) image reconstruction method consisting of two steps. In the first step, the backprojected image is formed after taking the derivative of the… Expand

Image reconstruction from fan-beam projections on less than a short scan.

- F. Noo, M. Defrise, R. Clackdoyle, H. Kudo
- Medicine, Mathematics
- Physics in medicine and biology
- 21 July 2002

This work is concerned with 2D image reconstruction from fan-beam projections. It is shown that exact and stable reconstruction of a given region-of-interest in the object does not require all lines… Expand

Analytic method based on identification of ellipse parameters for scanner calibration in cone-beam tomography.

- F. Noo, R. Clackdoyle, C. Mennessier, T. A. White, T. Roney
- Physics, Medicine
- Physics in medicine and biology
- 1 November 2000

This paper is about calibration of cone-beam (CB) scanners for both x-ray computed tomography and single-photon emission computed tomography. Scanner calibration refers here to the estimation of a… Expand

Truncated Hilbert transform and image reconstruction from limited tomographic data

- M. Defrise, F. Noo, R. Clackdoyle, H. Kudo
- Mathematics
- 1 June 2006

A data sufficiency condition for 2D or 3D region-of-interest (ROI) reconstruction from a limited family of line integrals has recently been introduced using the relation between the backprojection of… Expand

A cone-beam reconstruction algorithm using shift-variant filtering and cone-beam backprojection

- M. Defrise, R. Clackdoyle
- Mathematics, Medicine
- IEEE Trans. Medical Imaging
- 1 March 1994

An exact inversion formula written in the form of shift-variant filtered-backprojection (FBP) is given for reconstruction from cone-beam data taken from any orbit satisfying H.K. Tuy's (1983)… Expand

Cone-beam reconstruction using the backprojection of locally filtered projections

- J. Pack, F. Noo, R. Clackdoyle
- Medicine, Mathematics
- IEEE Transactions on Medical Imaging
- 3 January 2005

This paper describes a flexible new methodology for accurate cone beam reconstruction with source positions on a curve (or set of curves). The inversion formulas employed by this methodology are… Expand

Tomographic Reconstruction in the 21st Century

- R. Clackdoyle, M. Defrise
- Computer Science
- IEEE Signal Processing Magazine
- 14 June 2010

Image reconstruction from projections is the field that lays the foundations for computed tomography (CT). For several decades, the established principles were applied not only to medical scanners in… Expand

Direct determination of geometric alignment parameters for cone-beam scanners.

- C. Mennessier, R. Clackdoyle, F. Noo
- Mathematics, Medicine
- Physics in medicine and biology
- 21 March 2009

This paper describes a comprehensive method for determining the geometric alignment parameters for cone-beam scanners (often called calibrating the scanners or performing geometric calibration). The… Expand

Quantitative reconstruction from truncated projections in classical tomography

- R. Clackdoyle, F. Noo, Junyu Guo, J. Roberts
- Physics
- IEEE Transactions on Nuclear Science
- 18 October 2004

We prove that some kinds of truncation are entirely admissible for region-of-interest (ROI) reconstructions in classical tomography, contrary to the long-standing folklore that two-dimensional… Expand

New super-short-scan algorithms for fan-beam and cone-beam reconstruction

- H. Kudo, F. Noo, M. Defrise, R. Clackdoyle
- Computer Science
- IEEE Nuclear Science Symposium Conference Record
- 10 November 2002

This paper deals with image reconstruction from fan-beam and cone-beam projections when only a region of interest (ROI) is to be reconstructed. We propose a new fan-beam FBP algorithm which can… Expand