- Workshop presentation
- Open Access
Highly accelerated real-time T2-weighted imaging with through-time radial GRAPPA and low-latency GPU reconstruction
© Xu et al.; licensee BioMed Central Ltd. 2014
- Published: 16 January 2014
- Acute Myocardial Infarction
- High Temporal Resolution
- Acute Injury
- Radial Sequence
- Latency Reconstruction
T2-weighted cardiac images are commonly used for edema detection [1–4]. However, neither black-blood TSE nor cine images can offer real-time edema monitoring, and are therefore not suitable for the guidance of cardiac ablation procedures. We proposed a radial T2-weighted interrupted balanced SSFP (rT2W-iSSFP), a real-time high temporal resolution sequence targeted at monitoring edema.
Swine with acute injury (N = 2) were imaged on a 1.5T scanner (Avanto, Siemens, Germany). Free-breathing ECG-triggered single-shot rT2W-iSSFP was acquired (TE-effective = 80 ms; TR = 3 ms; matrix = 192 × 192; 3 slices per heartbeats). ECG-triggered, breath-held T2W-TSE (TE = 80 ms, resolution = 1 × 1 mm2, matrix = 192 × 192) was used as a reference.
The results from simulation of T2W-TSE and rT2W-iSSFP are shown in Figures 2b and 2c. The intensity difference between CSF and liver is similar in T2W-TSE and rT2W-iSSFP. Streaking artifacts are seen in Figure 2c, but these are not pronounced in in vivo images. Four-chamber views of swine heart from T2W-TSE (breath-hold) and rT2W-iSSFP (free-breathing) are shown in Figures 2d and 2e. Edema at the anteroseptal region due to acute myocardial infarction is depicted (the arrows in d).
rT2W-iSSFP offers high temporal resolution T2-weighted imaging with image quality sufficient for visualization of edema from acute injury. rT2W-iSSFP can be applied to real-time monitoring of edema formation during cardiac interventions.
- Kellman, et al: MRM. 2007Google Scholar
- Vergara, et al: Heart Rhythm. 2010Google Scholar
- Simonetti, et al: Radiology. 1996Google Scholar
- Dharmakumar, et al: MRM. 2006Google Scholar
- Seiberlich, et al: MRM. 2011Google Scholar
- Saybasili, et al: ISMRM. 2013Google Scholar
- Paul, et al: MRM. 2006Google Scholar
- Derbyshire, et al: MRM. 2005Google Scholar
- Hennig, et al: MRM. 1986Google Scholar
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.