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Fig. 2 | Journal of Cardiovascular Magnetic Resonance

Fig. 2

From: Noncontrast free-breathing respiratory self-navigated coronary artery cardiovascular magnetic resonance angiography at 3 T using lipid insensitive binomial off-resonant excitation (LIBRE)

Fig. 2

The relation (see Eq. 1) between sub-pulse duration (τ) and excitation frequency of the LIBRE pulse for optimal fat nulling was plotted using a radiofrequency (RF) excitation angle of 10° (blue lines) and 90° (dashed red line). Shades of blue indicate a range of fat resonance frequencies, from − 400 Hz to − 480 Hz. Note that the optimal LIBRE frequency (dashed blue lines) for fat suppression varies according to the resonance frequency of fat and thus illustrates the need for a large fat suprression bandwidth. Similar regions were indicated in the phantom experiments where fRF was varied (Fig. 1b)

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