2116 Multislab whole-heart coronary angiography
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BioMed Central
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Meeting abstract
2116 Multislab whole-heart coronary angiography Volker Rasche*, Axel Bornstedt, Peter Bernhardt, Vinzenz Hombach, Markus Kunze, Jochen Spiess and Nico Merkle Address: University Ulm, Ulm, Germany * 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):A385
doi:10.1186/1532-429X-10-S1-A385
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/A385 © 2008 Rasche et al; licensee BioMed Central Ltd.
To simultaneously assess the right and left coronary artery tree, whole-heart imaging techniques covering the entire region between the ostia of the coronary arteries and the diaphragm are required. For the analysis of the resulting angiographic data, sufficient isotropic spatial resolution enabling multi-planar reformats of the data for inspection of the entire course of the arteries is mandatory. Wholeheart imaging, however, is still limited by the required long acquisition times in the order of 15 minutes. During the long acquisitions, the likelihood of patient motion as well as drifts of the expiratory position is high. Furthermore, the optimal cardiac phase with minimal residual cardiac motion may vary depending on oder with respect to the location along the patient axis.
corrected cardiac triggered steady-state-free-precision (SSFP) sequence with fat suppression and T2 preparation. The navigator gating window was chosen 5 mm wide. Acquisition parameters were as: TE/TR = 1.8/3.6 ms, matrix size = 192 × 192 × 32, field-of-view (AP/FH/RL) = 230/45/230 mm; reconstruction matrix size = 512 × 512 × 64, parallel imaging factor = 1.4 in AP direction. Prior to each volume acquisition, a functional scan aligned with the center of the respective slab was acquired and the resting phase of the heart was individually assessed by visual inspection. Furthermore, the position of the gating window was adapted individually for each slab. For visualization, multi-planar reformatting of the data was performed individually for each slab applying the "soap-bubble" tool.
Purpose
Results
In this work an approach to whole heart imaging was investigated, in which the acquisition of the entire volume was divided into subsequent acquisitions of up to three slabs, which in combination ensured coverage of the entire heart at reasonable spatial resolution.
All scans could be completed successfully. The average navigator efficiency was about 60% and no scan had to be aborted due to navigator drifts. The measurement time per slab was on average 300 s. The manually derived optimal phase points suggested using a longer trigger delay for the most caudally located slab in three volunteers.
Introduction
Methods Seven h
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