- Poster presentation
- Open Access
Application of continuous composite RF pulses as components of a fat-suppressed T2-preparation module for 3 Tesla - evaluation of its fat suppression efficiency in clinical cardiac patients
© Kim et al; licensee BioMed Central Ltd. 2013
- Published: 30 January 2013
- Suppression Efficiency
- Cardiac Patient
- Attenuate Inversion Recovery
- Continuous Pulse
- Composite Pulse
In myocardial T2-imaging, T2-preparation (T2P) is a common mechanism of creating T2-contrast to reveal pathophysiology. Because T2-contrast is often subtle, bright fat signal can hamper image analysis. Combining T2P with fat suppression (FS) is thus advantageous, but fat saturation is frequently inefficient, and fat inversion by Spectral Attenuated Inversion Recovery (SPAIR) requires high power and constrains sequence timing. We created a T2P module with integrated fat inversion by applying the novel concept of continuous composite RF pulses to create tip-down and flip-back components. We compared this module to two existing modules. Our aim was to develop a shorter T2P compatible FS requiring less power and allowing more flexible timing than SPAIR, but with equivalent suppression efficiency.
The designed T2PFS inverts fat at the end of the module while simultaneously providing T2-weighting of water (Figure 1d). Figure 2a shows typical T2-prepared patient images using T2PWO, T2PFS, and SPAIRT2P. Visual inspection revealed excellent suppression of pericardial fat by T2PFS and SPAIRT2P (arrows). Statistical analysis of relative SNR confirmed significantly suppressed fat by T2PFS and SPAIRT2P, while myocardium and cavity SNR were not affected compared to T2PWO (Figure 2b). Typical energy of T2PWO, T2PFS, and SPAIRT2P was 148.0 Ws, 152.0 Ws and 153.9 Ws, respectively. Energy per fat inversion by T2PFS was 30.5% lower than by SPAIRT2P.
We present a novel T2P with integrated fat inversion that is shorter and requires less power than SPAIR, but with the same excellent FS efficiency as SPAIR.
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.