[Evaluation of change in the optimal image reconstruction phase in retrospective ECG-gated reconstruction].
Nihon Hoshasen Gijutsu Gakkai Zasshi
; 62(1): 122-9, 2006 Jan 20.
Article
en Ja
| MEDLINE
| ID: mdl-16456513
ABSTRACT
The purpose of this study was to optimize the reconstruction phase in order to improve depiction of the coronary artery in the relative delay method of the retrospective electrocardiogram (ECG)-gated reconstruction technique using a multi-slice computed tomography (MSCT) scanner with four channels. The following items were evaluated; 1) image quality of the coronary arteriogram, 2) degree of difference between the standard phase corresponding to the diastasis period and the selected phase, which was determined in each case to obtain the best image, and 3) the factors causing the phase difference. The image quality in the selected phase was better than that in the standard phase. A positive correlation was observed between the degree of phase difference and the median value and standard deviation of the heart rate. The degradation of image quality was remarkable in cases showing a large degree of phase difference. A negative correlation was observed between image quality in the selected phase and the degree of phase difference. Individualizing the reconstruction phase is required to improve the image quality of coronary arteriograms with MSCT. It should be noted that the condition of a low and stable heart rate results in reduction in the degree of phase difference, which is useful for the acquisition of better images.
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Banco de datos:
MEDLINE
Asunto principal:
Procesamiento de Imagen Asistido por Computador
/
Angiografía Coronaria
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Isquemia Miocárdica
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Tomografía Computarizada Espiral
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Electrocardiografía
Límite:
Adolescent
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Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
Ja
Revista:
Nihon Hoshasen Gijutsu Gakkai Zasshi
Año:
2006
Tipo del documento:
Article