Children have up to 10 times higher sensitivity to ionising radiation, therefore dose reduction is still a hot topic in paediatric computed tomography (CT). One of the most effective dose reduction tools is decreasing tube voltage. Because of the exponential relationship between radiation dose and peak kilovoltage, tube voltage should be adjusted according to age. Since Hounsfield units (HU) are depending on the radiation dose, different computed tomography angiography (CTA) thresholds for different tube voltages should be considered. This study was designed to demonstrate the alteration of HU depending on varied tube voltage and furthermore to consider the necessity of consequently modified CTA threshold values. Read More

Meeting name: IPR 2016 Conjoint Meeting & Exhibition , 2016

Authors: Nagy Eszter, Marterer Robert, Tschauner Sebastian, Lindbichler Franz, Sorantin Erich

Keywords: phantom study, kv modulation

Right ventricular (RV) function represents a prognostic marker in patients with congenital heart defects (CHD), essentially in patients with right bundle branch block (RBBB). Due to the limitations of echocardiographic ventricle volume assessment, cardiac magnetic resonance imaging (CMR) is nowadays the method of choice in the follow-up of these patients. In a recently published study it has been shown that delayed RV contraction due to RBBB should be taken into account when performing CMR volumetric assessment with short axis plane method. Since recent recommendations suggest axial plane volume measurements, therefore current work was designed to assess the impact of RBBB on cardiac volumetric parameters evaluated with the axial plane method. Read More

Meeting name: IPR 2016 Conjoint Meeting & Exhibition , 2016

Authors: Nagy Eszter, Marterer Robert, Tschauner Sebastian, Grangl Gernot, Sorantin Erich

Keywords: cardiac MRI, volumetry, congenital heart defects