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Titolo:
A NEW PHANTOM FOR FAST DETERMINATION OF THE SCATTER RESPONSE OF A GAMMA-CAMERA
Autore:
BEEKMAN FJ; FREY EC; KAMPHUIS C; TSUI BMW; VIERGEVER MA;
Indirizzi:
UNIV UTRECHT HOSP,DEPT RADIOL & NUCL MED 3511 GV UTRECHT NETHERLANDS UNIV N CAROLINA,DEPT BIOMED ENGN CHAPEL HILL NC 27514 UNIV N CAROLINA,DEPT RADIOL CHAPEL HILL NC 27514
Titolo Testata:
IEEE transactions on nuclear science
fascicolo: 4, volume: 41, anno: 1994,
parte:, 1
pagine: 1481 - 1488
SICI:
0018-9499(1994)41:4<1481:ANPFFD>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
MONTE-CARLO; PROJECTOR-BACKPROJECTOR; PRACTICAL METHOD; SPECT; COMPENSATION; ATTENUATION; OBJECT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
F.J. Beekman et al., "A NEW PHANTOM FOR FAST DETERMINATION OF THE SCATTER RESPONSE OF A GAMMA-CAMERA", IEEE transactions on nuclear science, 41(4), 1994, pp. 1481-1488

Abstract

A triangular phantom is proposed which enables the determination and parameterization of the depth dependent scatter response function (SRF) in uniformly attenuating objects for Single Photon Emission ComputedTomography (SPECT) by means of a single line source measurement. Thisapproach replaces a tedious measurement series with line sources at various depths in slab phantoms. The method is evaluated for Tc-99m. Monte Carlo simulations of SRFs and scatter-to-primary ratios (SPRs) of the triangular phantom are compared with those of slabs. It is found that both the SPRs and the shapes of the SRFs from the slab and triangular phantoms are in excellent agreement. In addition, the data obtained from a single measurement using the triangular phantom can be used in the parameterization of the slab phantom SRF and can be described byan analytical expression of the line source response function. This information can be combined with knowledge of the geometric detector response and the shape of the object to compute the full scatter response function in convex shaped objects. This method for estimating scatter can serve as the basis for accurate scatter compensation in SPECT.

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Documento generato il 29/01/20 alle ore 19:16:47