Comparison between free-breathing true-fisp cine sequences: radial vs cartesian k-space reconstruction
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BioMed Central
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Poster presentation
Comparison between free-breathing true-fisp cine sequences: radial vs cartesian k-space reconstruction Lorenzo Mannelli*1, Monvadi B Srichai1, Daniel Kim1, Rajesh Hiralal1, Xhafer Sinani2 and Ruth Lim1 Address: 1New York University, New York, NY, USA and 2Bellevue Hospital Center, New York, NY, USA * Corresponding author
from 13th Annual SCMR Scientific Sessions Phoenix, AZ, USA. 21-24 January 2010 Published: 21 January 2010 Journal of Cardiovascular Magnetic Resonance 2010, 12(Suppl 1):P79
doi:10.1186/1532-429X-12-S1-P79
Abstracts of the 13th Annual SCMR Scientific Sessions - 2010
Meeting abstracts - A single PDF containing all abstracts in this Supplement is available here. http://www.biomedcentral.com/content/files/pdf/1532-429X-11-S1-infoThis abstract is available from: http://jcmr-online.com/content/12/S1/P79 © 2010 Mannelli et al; licensee BioMed Central Ltd.
Introduction
Results
Real-time cine imaging is a commonly used cardiac MR acquisition technique in patients who are unable to breath-hold or who have significant arrhythmia during their examination.
With the BH sequence the mean ± SD LV EF was 51.5 ± 20% (range 22.3% - 73.6%), and the RV EF was 49.8 ± 21% (range 7.8% - 72.9%). With the free breathing Cartesian k-space reconstruction sequence the LV EF was 50.1 ± 24% (range 16.6% - 88%), and the RV EF was 45.1 ± 20% (range 11.6% - 70.5%). With the free-breathing radial kspace reconstruction sequence LV EF was 52.7 ± 21% (range 24.1% - 81%), and the RV EF was 45.7 ± 17% (range 14% - 72.6%). RV and LV end systolic (ES) and end diastolic (ED) Volumes (V) are reported in table 1.
Purpose To compare cartesian versus radial k-space reconstruction in a free-breathing real-time true fast imaging with steadystate precession (true-FISP) sequence to quantify left ventricle (LV) and right ventricle (RV) volumes and ejection fraction (EF).
Methods Left and right ventricular volume and function studies were performed in 11 consecutive patients. Three different true-FISP sequences were acquired using a 1.5 T scanner: free-breathing single shot with radial k-space reconstruction, free-breathing single shot with Cartesian k-space reconstruction, and breath-hold (BH) segmented acquisition with Cartesian k-space reconstruction. For the radial and Cartesian sequences the temporal resolution was 77 ms and 79 ms, respectively, and for the segmented Cartesian acquisition the temporal resolution was 45 ms. Ventricular cavities were manually segmented at end-diastolic and end-systolic phases. The BH sequence was used as the reference standard, and a Bland-Altman analysis was performed to evaluate the free-breathing sequences.
Bland-Altman analysis between the BH and the freebreathing Cartesian k-space reconstruction demonstrated the measured bias for the LV EF was 2.4% and the 95% limits of agreement (LOA) were -12.6 to 17.4%, the bias for the RV EF was 7.9% and the 95% LOA were -15 to 30.7%; between the BH and the free-breathing radial kspace reconstruction t
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