Routine evaluation of left ventricular function using CZT-SPECT, with low injected activities and limited recording times.
J Nucl Cardiol
; 25(1): 249-256, 2018 Feb.
Article
em En
| MEDLINE
| ID: mdl-27677613
ABSTRACT
PURPOSE:
Gamma-cameras, with Cadmium-Zinc-Telluride (CZT) detectors, allow to perform myocardial perfusion imaging (MPI) with limited injected activities and recorded times. This study aimed at determining whether the routine assessment of left ventricular (LV) function with such limited counts protocols compares well with reference values from cardiac MRI.METHODS:
The study included patients who have undergone cardiac MRI and an MPI routinely planned on a CZT camera with a low-dose protocol (120 MBq of Sestamibi for stress and 360 MBq at rest for 75 kg body weight), while targeting the recording of only 500 myocardial kcounts in order to limit the recording times (<10 minutes for stress, <4 minutes for rest). SPECT images were reconstructed with a method maintaining rather high spatial (8 mm) and temporal (16 frames/cycle) resolutions.RESULTS:
Seventy-six patients were included, and mean effective dose was 3.5 ± 1.7 mSv for the total MPI protocol. Correlations between CZT-SPECT and MRI were good to excellent for ejection fraction (r 2 = 0.77), end-diastolic (r 2 = 0.88) and end-systolic (r 2 = 0.93) volumes, and the analysis of segmental contractility correlated well between the two techniques (kappa score = 0.72 ± 0.02).CONCLUSION:
LV function, assessed on a CZT camera with low injected activities and limited recording times, correlates well with the reference assessment from cardiac MRI.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Telúrio
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Zinco
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Cádmio
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Imageamento por Ressonância Magnética
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Tomografia Computadorizada de Emissão de Fóton Único
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Função Ventricular Esquerda
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Imagem de Perfusão do Miocárdio
Tipo de estudo:
Observational_studies
Limite:
Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
J Nucl Cardiol
Ano de publicação:
2018
Tipo de documento:
Article