219 Feasibility of whole-heart steady-state free precession magnetic resonance coronary angiography (MRCA) in infants an
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Meeting abstract
219 Feasibility of whole-heart steady-state free precession magnetic resonance coronary angiography (MRCA) in infants and children with congenital heart disease Tarinee Tangcharoen*, Sanjeet Hegde, Aaron Bell, Philip Beerbaum, Tobias Schaeffter, Reza Razavi and Gerald Greil Address: King's College London, London, UK * Corresponding author
from 11th Annual SCMR Scientific Sessions Los Angeles, CA, USA. 1–3 February 2008 Published: 22 October 2008 Journal of Cardiovascular Magnetic Resonance 2008, 10(Suppl 1):A80
doi:10.1186/1532-429X-10-S1-A80
Abstracts of the 11th Annual SCMR Scientific Sessions - 2008
Meeting abstracts – A single PDF containing all abstracts in this Supplement is available here. http://www.biomedcentral.com/content/pdf/1532-429X-10-S1-info.pdfThis abstract is available from: http://jcmr-online.com/content/10/S1/A80 © 2008 Tangcharoen et al; licensee BioMed Central Ltd.
Introduction The whole-heart Steady-State Free Precession (SSFP) MRCA has been used in adult patients for imaging coronary tree1. However, its routine use to image coronary arteries in children with congenital heart disease has not been proven yet. Since an abnormal course of coronary arteries is not uncommon in complex congenital heart and relevant for surgical planning.
Purpose This study demonstrates the capability of this technique in imaging the origin and course of coronary arteries in children with complex congenital heart disease.
Methods 100 patients (median age 3 years, age range 4 months–11 yrs) with congenital heart disease were imaged with Philips Intera 1.5 T MR scanner under general anesthesia. After injection of contrast (Magnevist 0.2 mmol/kg), a vector cardiogram-triggered, free-breathing, 3D-SSFP whole-heart approach with navigator gating (3 mm) was used with nearly isotropic image resolution (table 1). The acquisition window was adapted to the resting period of the heart. Image quality of the left and right coronary arteries were assessed by two independent observers using a score ranging from 0 (nonvisible) to 4 (excellent quality). The coronary arteries were reformatted using SoapBubble tool2 for vessel length measurements.
Echocardiography findings and surgical findings were reference standards for assessment of coronary origins and proximal course.
Results All studies were completed without adverse effects. The origins of both left and right coronary arteries were imaged in 89 patients (89%). Only one coronary artery was imaged in 8 patients and 3 patients (age 4 months and 5 months old) were not able to visualized the coronary arteries. Average image quality of left main, left anterior descending, left circumflex and right coronary arteries are described in table 2. Left circumflex artery showed lowest image quality compared with other coronary segments. 9 patients with single coronary artery were corTable 1: Relevant parameters using in whole-heart SSFP MRCA
Parameters Repetition time (msec) Echo time (msec) Field of view (mm) Flip angle (de
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