LAVA Flex is a 3D, FSPGR imaging technique that acquires water-only, fat-only, in-phase and out-of-phase echoes in one single acquisition that is typically completed in one 20 second breath-hold. This technique provides excellent homogeneous fat suppression over the entire field of view, including areas that are difficult to image using conventional fat suppression, due to magnetic susceptibility effect.
All four contrasts are perfectly coregistered because they are acquired in the same scan. The water-only contrast differs from a conventional fat suppressed image in that an inversion prep pulse is not applied for fat suppression. In fact, the fat information is removed, leaving a water-only image that may potentially be used in place of a LAVA type image. LAVA Flex uses ARC*, a 2D self calibrated, parallel-imaging technique that allows for acceleration in both phase and slice directions for supported coils.
"LAVA Flex provides 3D T1w imaging with high SNR and CNR, with very homogeneous fat saturation."
Dr M. Zins
Hospital St Joseph, Paris, France