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Titolo:
Effects of upward creep and respiratory motion in myocardial SPECT
Autore:
Tsui, BMW; Segars, WP; Lalush, DS;
Indirizzi:
Univ N Carolina, Dept Biomed Engn, Chapel Hill, NC 27599 USA Univ N Carolina Chapel Hill NC USA 27599 Engn, Chapel Hill, NC 27599 USA Univ N Carolina, Dept Radiol, Chapel Hill, NC 27599 USA Univ N Carolina Chapel Hill NC USA 27599 adiol, Chapel Hill, NC 27599 USA
Titolo Testata:
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
fascicolo: 3, volume: 47, anno: 2000,
parte:, 3
pagine: 1192 - 1195
SICI:
0018-9499(200006)47:3<1192:EOUCAR>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
PATIENT MOTION; FREQUENT SOURCE; HEART;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Tsui, BMW Univ N Carolina, Dept Biomed Engn, Chapel Hill, NC 27599 USA Univ N Carolina Chapel Hill NC USA 27599 pel Hill, NC 27599 USA
Citazione:
B.M.W. Tsui et al., "Effects of upward creep and respiratory motion in myocardial SPECT", IEEE NUCL S, 47(3), 2000, pp. 1192-1195

Abstract

In this study, we investigate the effects of two patient involuntary motions, namely upward creep (UC) and respiratory (RSP) motion, in myocardial SPECT images. A new realistic torso phantom was developed based on data from the Visual Human Project and using non-uniform rational B-splines (NURBS) modeling. The heart and diaphragm of the phantom move with a linear upward translation to model UC and move in a sinusoidal up and down fashion to model RSP motion. Simulated emission and transmission CT data sets were generated from the phantom using a G-shaped dual-camera SPECT system with a radioactivity distribution modeling that of a Tl-210 study with UC of 2 cm. The effects of attenuation and collimator-detector response are included in the simulation. A patient study with the same extent of UC was used for comparison. Both simulated and patient data were reconstructed with and without correction for attenuation and UC. Similar data sets were generated from the phantom with RSP motion. The simulated reconstructed images demonstrated distinct UC and RSP artifacts in the inferior region of the myocardium. The UC artifact can be greatly reduced with simple UC correction. However, the correction of RSP artifact may require respiratory gating.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 06:30:24