Computational Science - ICCS 2001: International Conference by Mohammad A. Rajabi, J. A. Rod Blais (auth.), Vassil N. PDF

By Mohammad A. Rajabi, J. A. Rod Blais (auth.), Vassil N. Alexandrov, Jack J. Dongarra, Benjoe A. Juliano, René S. Renner, C. J. Kenneth Tan (eds.)

ISBN-10: 3540422331

ISBN-13: 9783540422334

LNCS volumes 2073 and 2074 include the complaints of the overseas convention on Computational technology, ICCS 2001, held in San Francisco, California, may well 27-31, 2001. the 2 volumes encompass greater than 230 contributed and invited papers that replicate the goals of the convention to compile researchers and scientists from arithmetic and desktop technology as uncomplicated computing disciplines, researchers from numerous software parts who're pioneering complicated program of computational tips on how to sciences akin to physics, chemistry, lifestyles sciences, and engineering, arts and humanitarian fields, in addition to software program builders and owners, to debate difficulties and recommendations within the quarter, to spot new concerns, and to form destiny instructions for examine, in addition to to assist business clients observe numerous complex computational techniques.

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Extra info for Computational Science - ICCS 2001: International Conference San Francisco, CA, USA, May 28—30, 2001 Proceedings, Part II

Example text

Therefore, each detector plane corresponds to one sinogram. Image reconstruction algorithms are designed to retrieve the original activity distribution from the measured line integrals. From each sinogram, a transverse image is reconstructed, with the group of all images representing the data volume. Ignoring the measurement of noise leads to the classical filtered backprojection (FBP) algorithm [3]. Reconstruction with FBP is done in two steps: Each projection is convolved with a shift invariant kernel to emphasize small structures but reduce frequencies above a certain limit.

The result is an x-ray image focused on a plane that is parallel to the table at the center of rotation. When digital equipment is used, the film is replaced by an XRII and a CCD and continuous integration is replaced by a discrete image integration. 2a). (a) (b) (c) (d) Fig. 2. Single frame distorted (a) and corrected (b). Linear Tomography distorted (c) and corrected (d). 26 C. Forlani and G. 2c). Ideally, in order to obtain a correct digital linear tomography image, each frame should be corrected by means of an angularly dependent global LUT before integration, but that would be time and computationally intensive.

The performance of the system is then evaluated in Section 6. The paper is rounded up by some concluding remarks and a brief outlook in Section 7. 2 Nuclear Medical Imaging Using PET Positron Emission Tomography is a nuclear medicine technique which allows to measure quantitative activity distributions in vivo. It is based on the tracer principle: A biological substance, for instance sugar or a receptor ligand, is labeled with a positron emitter and a small amount is injected intravenously. Thus, it is possible to measure functional parameters, such as glucose metabolism, blood flow or receptor density.

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Computational Science - ICCS 2001: International Conference San Francisco, CA, USA, May 28—30, 2001 Proceedings, Part II by Mohammad A. Rajabi, J. A. Rod Blais (auth.), Vassil N. Alexandrov, Jack J. Dongarra, Benjoe A. Juliano, René S. Renner, C. J. Kenneth Tan (eds.)


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