Comparison of calcium scoring with 4-multidetector computed tomography (4-MDCT) and 64-MDCT: a phantom study.
J Comput Assist Tomogr
; 36(1): 88-93, 2012.
Article
em En
| MEDLINE
| ID: mdl-22261776
ABSTRACT
OBJECTIVE:
To determine differences in coronary artery calcium (CAC) measurement performed with the use of 2 generations of multidetector computed tomography (CT) scanners of the same manufacturer.METHODS:
Agatston Score (AS) and calcium mass (CM) were measured with a 4-row scanner (AS4 and CM4) and a 64-row scanner (AS64 and CM64) using a cardiac phantom with calcium inserts.RESULTS:
The results of the AS measurements (mean ± SD) varied significantly between the equipment 880.6 ± 30.1 (AS4) vs 586.5 ± 24.0 (AS64; P < 0.0001). The AS interscanner variability was 31.6% for the phantom and from 25.5% to 110.1% for particular inserts. Mean ± SD CM values were different as well 192.8 ± 5.0 mg (CM4) vs 152.4 ± 2.6 mg (CM64; P < 0.0001). Determination of CM with 64-row CT was more accurate than that with an older scanner; the mean relative error was -9.1% and 15.0%, respectively (P < 0.0001). The CM interscanner variability was 23.3% for the phantom and from 19.0% to 122.8% for particular inserts. The interexamination variability ranged from 1.7% (CM64) to 5.6% (AS4).CONCLUSIONS:
Coronary artery calcium scoring with the 64-row CT scanner is more accurate than with the 4-row device The difference between the results of AS and CM measurements carried out with both scanners is statistically significant.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Calcinose
/
Angiografia Coronária
/
Doença das Coronárias
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Técnicas de Imagem de Sincronização Cardíaca
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Tomografia Computadorizada Multidetectores
Limite:
Humans
Idioma:
En
Revista:
J Comput Assist Tomogr
Ano de publicação:
2012
Tipo de documento:
Article