Assessment of Single-Bolus Contrast Administration Technique Using Hybrid Dual-Source ECG-Gated Thoracic and Dual-Source Non–ECG-Gated High-Pitch Abdominopelvic CT Acquisitions for Procedural Planning Before Transcatheter Aortic Valve Replacement. Issue 2 (March 2015)

• Record Type: Journal Article
• Authors: Walker, Wendy L.; Boll, Daniel T.; Bueno, Juliana M.; Kiefer, Todd L.; Vavalle, John P.; Gaca, Jeffrey G.; Harrison, J. Kevin; Hughes, G. Chad; Wang, Andrew; Hurwitz, Lynne M.
• Is Part Of: Journal of computer assisted tomography. Volume 39:Issue 2(2015)
• Publication Date: 2015-03
• Subjects: Tomography -- Periodicals; Tomography -- Periodicals; Tomography; Periodicals; 616.0757
• DOI: 10.1097/RCT.0000000000000194
• Languages: English
• ISSNs: 0363-8715

Abstract

<abstract> <title> <x xml:space="preserve">Abstract</x> </title> <sec> <title>Purpose</title> <p>This study aimed to assess vascular contrast opacification and homogeneity using single-bolus contrast administration with hybrid thoracic and abdominopelvic computed tomographic angiography in patients with severe aortic valve stenosis.</p> </sec> <sec> <title>Materials and Methods</title> <p>Combination electrocardiogram-gated thoracic and dual-source, high-pitch abdominopelvic computed tomographic angiography examinations of 50 patients with severe aortic stenosis between December 2013 and March 2014 were reviewed. Contrast administration was individualized to patient-specific physiology. Image analysis of vascular opacification was obtained and interdependencies of vascular contrast and homogeneity of contrast distribution were assessed.</p> </sec> <sec> <title>Results</title> <p>The mean volume of contrast administered was 106 ± 11.7 mL. Mean attenuation was 371 ± 90.7 Hounsfield units (HU) in the thoracic aorta and 388 ± 95.9 HU in the abdominal aorta. Homogeneous opacification was obtained throughout with coefficient of variation of 11%.</p> </sec> <sec> <title>Conclusions</title> <p>Procedural planning for transcatheter aortic valve replacement can be achieved using a single-injection bolus contrast protocol in combination with a 2-part multidetector computed tomographic image acquisition technique with optimal opacification of major arterial structures.</p> </sec> </abstract>