Utility of the 16-cm Axial Volume Scan Technique for Coronary Artery Calcium Scoring on Non-Enhanced Chest CT: A Prospective Pilot Study
Purpose This study aimed to evaluate the utility of the 16-cm axial volume scan technique for calculating the coronary artery calcium score (CACS) using non-enhanced chest CT. Materials and Methods This study prospectively enrolled 20 participants who underwent both, non-enhanced chest CT (16-cm-...
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| Autores principales: | , , , , , |
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| Formato: | article |
| Lenguaje: | EN KO |
| Publicado: |
The Korean Society of Radiology
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/7c4f6da84b254c12b6b59478b517194d |
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| Sumario: | Purpose This study aimed to evaluate the utility of the 16-cm axial volume scan technique for
calculating the coronary artery calcium score (CACS) using non-enhanced chest CT.
Materials and Methods This study prospectively enrolled 20 participants who underwent
both, non-enhanced chest CT (16-cm-coverage axial volume scan technique) and calciumscore
CT, with the same parameters, differing only in slice thickness (in non-enhanced chest
CT = 0.625, 1.25, 2.5 mm; in calcium score CT = 2.5 mm). The CACS was calculated using the
conventional Agatston method. The difference between the CACS obtained from the two CT
scans was compared, and the degree of agreement for the clinical significance of the CACS was
confirmed through sectional analysis. Each calcified lesion was classified by location and size,
and a one-to-one comparison of non-contrast-enhanced chest CT and calcium score CT was
performed.
Results The correlation coefficients of the CACS obtained from the two CT scans for slice thickness
of 2.5, 1.25, and 0.625 mm were 0.9850, 0.9688, and 0.9834, respectively. The mean differences
between the CACS were -21.4% at 0.625 mm, -39.4% at 1.25 mm, and -76.2% at 2.5 mm
slice thicknesses. Sectional analysis revealed that 16 (80%), 16 (80%), and 13 (65%) patients
showed agreement for the degree of coronary artery disease at each slice interval, respectively.
Inter-reader agreement was high for each slice interval. The 0.625 mm CT showed the highest
sensitivity for detecting calcified lesions. Conclusion The values in the non-contrast-enhanced chest CT, using the 16-cm axial volume scan
technique, were similar to those obtained using the CACS in the calcium score CT, at 0.625 mm slice
thickness without electrocardiogram gating. This can ultimately help predict cardiovascular risk without
additional radiation exposure. |
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