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Titolo:
ATTENUATION ARTIFACTS IN SPECT - EFFECT OF WRAP-AROUND LUNG IN 180-DEGREES CARDIAC STUDIES
Autore:
DIBELLA EVR; EISNER RL; BARCLAY AB; PATTERSON RE; NOWAK DJ;
Indirizzi:
EMORY UNIV,CRAWFORD LONG HOSP,CARLYLE FRASER HEART CTR,DEPT NUCL CARDIOL,550 PEACHTREE ST NE ATLANTA GA 30365 EMORY UNIV,CRAWFORD LONG HOSP,CARLYLE FRASER HEART CTR,DEPT MED CARDIOL ATLANTA GA 30365 EMORY UNIV,CRAWFORD LONG HOSP,CARLYLE FRASER HEART CTR,DEPT RADIOL ATLANTA GA 30365 GEORGIA INST TECHNOL,DEPT ELECT ENGN ATLANTA GA 30332 GE MED SYST MILWAUKEE WI 00000
Titolo Testata:
The Journal of nuclear medicine
fascicolo: 11, volume: 37, anno: 1996,
pagine: 1891 - 1896
SICI:
0161-5505(1996)37:11<1891:AAIS-E>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
TL-201;
Keywords:
MYOCARDIAL PERFUSION IMAGING; SPECT; ARTIFACTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
7
Recensione:
Indirizzi per estratti:
Citazione:
E.V.R. Dibella et al., "ATTENUATION ARTIFACTS IN SPECT - EFFECT OF WRAP-AROUND LUNG IN 180-DEGREES CARDIAC STUDIES", The Journal of nuclear medicine, 37(11), 1996, pp. 1891-1896

Abstract

We estimated that in 75%-90% of PET Rb-82 patients the left lung appeared to wrap around the anterior aspect of the left ventricle. We usedclinical PET Rb-82 myocardial perfusion studies as the input to a SPECT computer simulation model to determine a patients with left lung wrap-around displayed consistent artifacts in reconstructed SPECT images. In particular, we sought an explanation for the hot lateral wall seen in SPECT images from normal female and male patients. Methods: Attenuated SPECT (TI)-T-201 emission data were simulated from a mid-ventricular slice in 10 randomly selected clinical PET Rb-82 studies with left lung wrap-around. In these same cases, the influence of left lung wrap-around was removed by assigning the left lung an attenuation coefficient which matched that of the heart. Five randomly selected clinicalPET Rb-82 studies without left lung wrap-around were also processed with our model. Results: In all 10 cases with left lung wrap-around, reconstructed SPECT images showed the hot lateral wall artifact with a mean septal-to-lateral wall count ratio of 0.86. With left lung wrap-around removed in the same 10 patients, reconstructed images did not show hot lateral wall (mean septal-to-lateral wall count ratio = 1.07). The 5 cases without left lung wrap-around did not show hot lateral wall(mean septal-to-lateral wall count ratio = 1.04) and the ratios changed little with the filling of the left lung (mean septal-to-lateral wall count ratio = 1.05). Conclusion: Results of our PET-to-SPECT computer simulation model showed that the hot lateral wall artifact found inSPECT myocardial perfusion images was related to the orientation and positions of the left ventricle and the left lung.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/12/19 alle ore 11:17:30