Catalogo Articoli (Spogli Riviste)
OPAC HELP
Titolo: IMPACT OF REORIENTATION ALGORITHMS ON QUANTITATIVE MYOCARDIAL SPECT PERFUSION IMAGING
Autore: HADDAD M; PORENTA G;
 Indirizzi:
 UNIV VIENNA,DEPT CARDIOL,WAHRINGER GURTEL 1820 A1010 VIENNA AUSTRIA UNIV VIENNA,DEPT CARDIOL A1010 VIENNA AUSTRIA
 Titolo Testata:
 The Journal of nuclear medicine
fascicolo: 11,
volume: 39,
anno: 1998,
pagine: 1864  1869
 SICI:
 01615505(1998)39:11<1864:IORAOQ>2.0.ZU;2V
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 CORONARYARTERY DISEASE; TL201 TOMOGRAPHY; OPTIMIZATION; IMAGES;
 Keywords:
 MYOCARDIAL PERFUSION SCINTIGRAPHY; SPECT IMAGE PROCESSING; QUANTITATIVE IMAGE ANALYSIS; IMAGE REORIENTATION;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Science Citation Index Expanded
 Citazioni:
 14
 Recensione:
 Indirizzi per estratti:



 Citazione:
 M. Haddad e G. Porenta, "IMPACT OF REORIENTATION ALGORITHMS ON QUANTITATIVE MYOCARDIAL SPECT PERFUSION IMAGING", The Journal of nuclear medicine, 39(11), 1998, pp. 18641869
Abstract
In myocardial SPECT perfusion imaging, reorientation algorithms from transaxial image planes are used to generate short and longaxis views of myocardial tracer uptake. We performed phantom experiments with Tl201 to delineate how image reorientation affects the results of quantitative image analysis, Methods: Thirty consecutive patient studies were analyzed to characterize the distribution of the angle of reorientation in a clinical setting. Shortaxis SPECT images of a cardiac phantom with and without a 180 degrees coldspot insert were reconstructedwith three different backprojection filters tramp, Metz and Butterworth) and reoriented through different angles ranging from 45 degrees to89 degrees. Four interpolation algorithms were used to calculate fromthe transaxial images the pixel values of the reoriented images: (a) a simple interpolator that averages the pixel values of the eight neighboring pixels of the transaxial image; (b) a threedimensional linearinterpolator; (c) a hybrid interpolator that combines a twodimensional linear inplane with a onedimensional cubic acrossplane interpolation; and (d) a threedimensional cubic convolution interpolator. Images were reoriented twice with opposite angles so that the original andthe reoriented images could be directly compared. Circumferential profile analysis was applied to determine the root mean square error of corresponding profiles and the difference of the extent and the severity of perfusion defects. Single and multivariate analyses of variance (ANOVA) were used to compare the effects of the reorientation angle, the backprojection filter and the interpolation algorithm. Results: In the clinical studies, the angle between the transaxial and reoriented images was 75 degrees +/ 10 degrees (s.d.), In 48 phantom experiments,multivariate ANOVA demonstrated that the backprojection filter and the interpolation algorithm significantly affect the circumferential profiles and the extent and severity of a perfusion defect (p < 0.05). Incontrast, the angle of reorientation was not a significant factor (p = ns). By univariate analysis, the threedimensional cubic interpolator was associated with significantly (p < 0.05) less error than the simple and threedimensional linear algorithms. Relative computation times (simple interpolator = 100%) were 119% for the threedimensional linear, 136% for the hybrid and 243% for the threedimensional cubic interpolator. Conclusion: For quantitative analysis of myocardial SPECT perfusion images, a Metz filter for filtered backprojection in combination with a threedimensional cubic convolution interpolation for image reorientation appears to offer improved accuracy.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/04/20 alle ore 23:53:27