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ORIGINAL ARTICLE Optimization of Tube Current in Coronary Multidetector Computed Tomography Angiography: Assessment of a Standardized Method to Individualize Current Selection Based on Body Habitus Jenny K. Hoang, MBBS, FRANZCR, Lynne M. Hurwitz, MD, and Daniel T. Boll, MD capable of contributing a coronary assessment to a comprehen- 1Y3 Abstract: This study sought to extract information on individual sive clinical cardiac workup. The vascular contrast attained in patient habitus from scout imaging and to correlate radiograph tube coronary MDCT angiography is determined by 2 interdependent current settings with enhancement of the coronaries as a function of factors: (1) a pharmacodynamic component originating from patient profiles for coronary multidetector computed tomography. intravascular contrast-agent distribution in the coronary arteries Materials and Methods: Fifty patients underwent coronary 64-slice and (2) a radiation-dependent component resulting from body- multidetector computed tomography consisting of 2-plane scouts and habitusY and heart rateYdependent radiograph tube parameters electrocardiography-gated coronary studies at 64 0.625 mm, radio- and pitch settings. Technical developments have led to sig- graph voltage of 120 kVp, and radiograph currents of 295 to 788 mA, nificant increases in spatial and temporal resolution, facilitating which were reconstructed during 65%, 75%, and 85% R-R intervals. an ongoing
Journal of Computer Assisted Tomography – Wolters Kluwer Health
Published: Jul 1, 2009
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