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Titolo:
A new algorithm for computer tomographic reconstruction from partial view projections
Autore:
Brunetti, A; Golosio, B;
Indirizzi:
Univ Sassari, Ist Matemat & Fis, I-07100 Sassari, Italy Univ Sassari Sassari Italy I-07100 Matemat & Fis, I-07100 Sassari, Italy
Titolo Testata:
MEDICAL PHYSICS
fascicolo: 4, volume: 28, anno: 2001,
pagine: 462 - 468
SICI:
0094-2405(200104)28:4<462:ANAFCT>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Keywords:
computed tomography; missing projections; image reconstruction; morphing;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Brunetti, A Univ Sassari, Ist Matemat & Fis, Via Vienna 2, I-07100 Sassari, Italy Univ Sassari Via Vienna 2 Sassari Italy I-07100 assari, Italy
Citazione:
A. Brunetti e B. Golosio, "A new algorithm for computer tomographic reconstruction from partial view projections", MED PHYS, 28(4), 2001, pp. 462-468

Abstract

Conventional algorithms for tomographic reconstruction require the acquisition of a complete set of projections at uniform angular displacements. In many cases, however, the geometry of the sample or a loss of data can significantly reduce the range of the available projections. Several algorithms have been proposed in literature to handle such situations, but their performances are low or they require strong constraints and hypothesis about thenature of the sample or the data. Here a new method is proposed. It is based on a novel morphing technique, which affords in general terms the problem of curve matching and is here specialized to the case of tomographic reconstruction. The proposed algorithm is very fast in comparison to other approaches having similar effectiveness; furthermore, it allows one to obtain good quality images even when a significant fraction of the views is absent,without any hypothesis about the nature of the sample or the kind of measurement. The results obtained by applying this technique to the Shepp-Logan phantom and to a clinical scan are reported here and discussed. (C) 2001 American Associntion of Physicists in Medicine.

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Documento generato il 25/01/20 alle ore 00:17:30