Estimation+of+the+radiation+exposure+of+a+chest.pdf

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Estimation+of+the+radiation+exposure+of+a+chest.pdf

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Estimationoftheradiationexposureofachest

Eur Radiol (2009) 19: 37–41 DOI 10.1007/s00330-008-1109-4 CARDIAC Dominik Ketelsen Marie H. Luetkhoff Christoph Thomas Matthias Werner Markus Buchgeister Ilias Tsiflikas Anja Reimann Christof Burgstahler Andreas F. Kopp Claus D. Claussen Martin Heuschmid Received: 11 April 2008 Accepted: 22 June 2008 Published online: 22 July 2008 # European Society of Radiology 2008 Estimation of the radiation exposure of a chest pain protocol with ECG-gating in dual-source computed tomography Abstract The aim of the study was to evaluate radiation exposure of a chest pain protocol with ECG-gated dual- source computed tomography (DSCT). An Alderson Rando phan- tom equipped with thermoluminescent dosimeters was used for dose mea- surements. Exposure was performed on a dual-source computed tomogra- phy system with a standard protocol for chest pain evaluation (120 kV, 320 mAs/rot) with different simulated heart rates (HRs). The dose of a standard chest CT examination (120 kV, 160 mAs) was also mea- sured. Effective dose of the chest pain protocol was 19.3/21.9 mSv (male/ female, HR 60), 17.9/20.4 mSv (male/ female, HR 80) and 14.7/16.7 mSv (male/female, HR 100). Effective dose of a standard chest examination was 6.3 mSv (males) and 7.2 mSv (fe- males). Radiation dose of the chest pain protocol increases significantly with a lower heart rate for both males (p=0.040) and females (p=0.044). The average radiation dose of a stan- dard chest CT examination is about 36.5% that of a CT examination performed for chest pain. Using DSCT, the evaluated chest pain pro- tocol revealed a higher radiation ex- posure compared with standard chest CT. Furthermore, HRs markedly in- fluenced the dose exposure when using the ECG-gated chest pain pro- tocol. Keywords Dual-source computed tomography . Radiation exposure . Effective dose . Chest pain Introduction Cardiovascular diseases remain the main cause of death in the westernworld. [1]. Excision of acute coronary artery syndrome (aCAS) has to be ruled