Radiation Doses in Patients Undergoing Computed Tomographic Coronary Artery Calcium Evaluation With a 64-Slice Scanner Versus a 256-Slice Scanner
Articolo
Data di Pubblicazione:
2022
Citazione:
Radiation Doses in Patients Undergoing Computed Tomographic Coronary Artery Calcium Evaluation With a 64-Slice Scanner Versus a 256-Slice Scanner / P. Madaj, D. Li, R. Nakanishi, D. Andreini, G. Pontone, E. Conte, R. O'Rourke, C. Hamilton-Craig, M. Nimmagadda, N. Kim, B. Fatima, C. Dailing, K. Shaikh, C. Shekar, J.H. Lee, M.J. Budoff. - In: TEXAS HEART INSTITUTE JOURNAL. - ISSN 0730-2347. - 49:2(2022 Mar 04), pp. e186793.1-e186793.5. [10.14503/THIJ-18-6793]
Abstract:
Computed tomographic coronary artery calcium scanning enables cardiovascular risk stratification; however, exposing patients to high radiation levels is an ongoing concern. New-generation computed tomographic systems use lower radiation doses than older systems do. To quantify comparative doses of radiation exposure, we prospectively acquired images from 220 patients with use of a 64-slice GE LightSpeed VCT scanner (control group, n=110) and a 256-slice GE Revolution scanner (study group, n=110). The groups were matched for age, sex, and body mass index; statistical analysis included t tests and linear regression.The mean dose-length product was 21% lower in the study group than in the control group (60.2 +/- 27 vs 75.9 +/- 22.6 mGy.cm; P <0.001) and also in each body mass index subgroup. Similarly, the mean effective radiation dose was 21% lower in the study group (0.84 +/- 0.38 vs 1.06 +/- 0.32 mSv) and lower in each weight subgroup. After adjustment for sex, women in the study group had a lower dose-length product (50.4 +/- 23.4 vs 64.7 +/- 27.6 mGy.cm) than men did and received a lower effective dose (0.7 +/- 0.32 vs 0.9 +/- 0.38 mSv) (P=0.009). As body mass index and waist circumference increased, so did doses for both scanners.Our study group was exposed to radiation doses lower than the previously determined standard of 1 mSv, even after adjustment for body mass index and waist circumference. In 256-slice scanning for coronary artery calcium, radiation doses are now similar to those in lung cancer screening and mammography.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Coronary angiography/ methods; Coronary artery disease/diag-nostic imaging; Multi-detector computed tomography/instrumen-tation; Predictive value of tests; Prospective studies; Radiation dosage; Radiation exposure/ prevention & control; Risk factors; Vascular calcification/diagnostic imaging;
Elenco autori:
P. Madaj, D. Li, R. Nakanishi, D. Andreini, G. Pontone, E. Conte, R. O'Rourke, C. Hamilton-Craig, M. Nimmagadda, N. Kim, B. Fatima, C. Dailing, K. Shaikh, C. Shekar, J.H. Lee, M.J. Budoff
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