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Clinical Question Influence on Radiation Dose of Cardiac CT Scan in Children

T. Adla, M. Kočí, V. Suchánek, Z. Šalagovičová, M. Polovinčák, L. Mikšík, J. Janoušek, M. Roček

. 2022 ; 9 (8) : . [pub] 20220805

Language English Country Switzerland

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc22023575

BACKGROUND: To assess the impact of different clinical questions on radiation doses acquired during cardiac computed tomography in children. METHODS: A total of 116 children who underwent cardiac CT on a third-generation dual-source CT scanner were included. The clinical questions were divided into three main categories: the extent of scanning in the z-axis, coronary artery assessment and cardiac function assessment. Radiation dose values represented as a dose-length product (DLP) in mGy*cm were recorded from the CT scanner protocols. RESULTS: There were significantly higher doses in cases with cardiac function assessment (median DLP 348 versus 59 mGy*cm, p < 0.01) and in cases with coronary artery assessment (median DLP 133 versus 71 mGy*cm, p < 0.01). CONCLUSION: The most important factor was the assessment of cardiac function, where the median radiation dose was 4.3× higher in patients with a request for cardiac function assessment. We strongly recommend that clinical requests for cardiac CT should be carefully considered in the paediatric population.

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$a BACKGROUND: To assess the impact of different clinical questions on radiation doses acquired during cardiac computed tomography in children. METHODS: A total of 116 children who underwent cardiac CT on a third-generation dual-source CT scanner were included. The clinical questions were divided into three main categories: the extent of scanning in the z-axis, coronary artery assessment and cardiac function assessment. Radiation dose values represented as a dose-length product (DLP) in mGy*cm were recorded from the CT scanner protocols. RESULTS: There were significantly higher doses in cases with cardiac function assessment (median DLP 348 versus 59 mGy*cm, p &lt; 0.01) and in cases with coronary artery assessment (median DLP 133 versus 71 mGy*cm, p &lt; 0.01). CONCLUSION: The most important factor was the assessment of cardiac function, where the median radiation dose was 4.3× higher in patients with a request for cardiac function assessment. We strongly recommend that clinical requests for cardiac CT should be carefully considered in the paediatric population.
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$a Polovinčák, Michal $u Department of Radiology, University Hospital Motol and 2nd Faculty of Medicine, Charles University, 150 06 Prague, Czech Republic
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