Correlation of radiation dose and heart rate in dual-source computed tomography coronary angiography
| Autor: | Arkadios Roussakis, Dimitra Tsantioti, Dimitrios Kehagias, Roxani Efthimiadou, Nikolaos Kritikos, Fotios Laspas, John Andreou |
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| Rok vydání: | 2011 |
| Předmět: |
Adult
Male medicine.medical_specialty Iohexol Contrast Media Coronary Artery Disease Coronary Angiography Radiation Dosage Effective dose (radiation) Correlation Coronary artery disease Electrocardiography symbols.namesake Heart Rate Heart rate Humans Medicine Radiology Nuclear Medicine and imaging Aged Retrospective Studies Aged 80 and over Radiological and Ultrasound Technology medicine.diagnostic_test business.industry General Medicine Middle Aged medicine.disease Pearson product-moment correlation coefficient symbols Female Radiology Tomography Tomography X-Ray Computed business Nuclear medicine medicine.drug |
| Zdroj: | Acta Radiologica. 52:273-277 |
| ISSN: | 1600-0455 0284-1851 |
| DOI: | 10.1258/ar.2010.090573 |
| Popis: | Background Computed tomography coronary angiography (CTCA) has been widely used since the introduction of 64-slice scanners and dual-source CT technology, but the relatively high radiation dose remains a major concern. Purpose To evaluate the relationship between radiation exposure and heart rate (HR), in dual-source CTCA. Material and Methods Data from 218 CTCA examinations, performed with a dual-source 64-slices scanner, were statistically evaluated. Effective radiation dose, expressed in mSv, was calculated as the product of the dose-length product (DLP) times a conversion coefficient for the chest (mSv = DLPx0.017). Heart rate range and mean heart rate, expressed in beats per minute (bpm) of each individual during CTCA, were also provided by the system. Statistical analysis of effective dose and heart rate data was performed by using Pearson correlation coefficient and two-sample t-test. Results Mean HR and effective dose were found to have a borderline positive relationship. Individuals with a mean HR >65 bpm observed to receive a statistically significant higher effective dose as compared to those with a mean HR ≤65 bpm. Moreover, a strong correlation between effective dose and variability of HR of more than 20 bpm was observed. Conclusion Dual-source CT scanners are considered to have the capability to provide diagnostic examinations even with high HR and arrhythmias. However, it is desirable to keep the mean heart rate below 65 bpm and heart rate fluctuation less than 20 bpm in order to reduce the radiation exposure. |
| Databáze: | OpenAIRE |
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