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Titolo:
The modeling of multiple order Compton scatter in SPECT
Autore:
Bai, CY; Zeng, GSL; Gullberg, GT;
Indirizzi:
Univ Utah, Dept Radiol, Salt Lake City, UT 84108 USA Univ Utah Salt Lake City UT USA 84108 adiol, Salt Lake City, UT 84108 USA
Titolo Testata:
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
fascicolo: 1, volume: 48, anno: 2001,
parte:, 1
pagine: 38 - 42
SICI:
0018-9499(200102)48:1<38:TMOMOC>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
POINT RESPONSE CORRECTION; KLEIN-NISHINA FORMULA; CONVERGING BEAM SPECT; ITERATIVE RECONSTRUCTION; BLURRING MODEL; COMPENSATION; PARALLEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Bai, CY Univ Utah, Dept Radiol, 729 Arapeen Dr, Salt Lake City, UT 84108 USA Univ Utah 729 Arapeen Dr Salt Lake City UT USA 84108 UT 84108 USA
Citazione:
C.Y. Bai et al., "The modeling of multiple order Compton scatter in SPECT", IEEE NUCL S, 48(1), 2001, pp. 38-42

Abstract

In our previous work, an efficient slice-by-slice blurring model was developed based on the Klein-Nishina formula to model first order Compton scatter in both parallel beam and converging beam SPECT. The first order Compton scatter projection was generated by first forming an effective scatter source imaging (ESSI) corresponding to first order Compton scatter and then forward-projecting the ESSI to the detector surface. using a projector that modeled both the non-uniform attenuation effect and the depth-dependent detector response effect. In this work, the technique was exetended to model multiple order Compton scatter. At each scattering voxel, first order Compton scattered photons combined in a scattering cone which was determined by theenergy window used for emission projection acquisition were used as the source for second order Compton scatter. The effective scatter source image (ESSI) corresponding to die second order Compton scatter was then obtained using the slice-by-slice blurring model. Forward-projecting this ESSI to thedetector gave the second order Compton scatter projection. For a point source in a non-uniform scattering object for fan beam geometry. the second order Compton scatter point responses generated using the proposed method matched well with those using Monte Carlo Simulations at the Peak region, but not as well at the tails. This work proposed an efficient method to model multiple order Compton scatter in both parallel beam and converging beam SPECT.

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Documento generato il 02/04/20 alle ore 18:57:16