Gaspar AS, Nunes RG, Ferrazzi G, Hughes EJ, Hutter J, Malik SJ, Mccabe L, Baruteau KP, Rutherford MA, Hajnal JV, Price AN (2019)
Publication Type: Journal article
Publication year: 2019
Book Volume: 81
Pages Range: 477-485
Journal Issue: 1
DOI: 10.1002/mrm.27375
Purpose: Echo planar imaging (EPI) is the primary sequence for functional and diffusion MRI. In fetal applications, the large field of view needed to encode the maternal abdomen leads to prolonged EPI readouts, which may be further extended due to safety considerations that limit gradient performance. The resulting images become very sensitive to water-fat shift and susceptibility artefacts. The purpose of this study was to reduce artefacts and increase stability of EPI in fetal brain imaging, balancing local field homogeneity across the fetal brain with longer range variations to ensure compatibility with fat suppression of the maternal abdomen. Methods: Spectral Pre-saturation with Inversion-Recovery (SPIR) fat suppression was optimized by investigating SPIR pulse frequency offsets. Subsequently, fetal brain EPI data were acquired using image-based (IB) shimming on 6 pregnant women by (1) minimizing B
APA:
Gaspar, A.S., Nunes, R.G., Ferrazzi, G., Hughes, E.J., Hutter, J., Malik, S.J.,... Price, A.N. (2019). Optimizing maternal fat suppression with constrained image-based shimming in fetal MR. Magnetic Resonance in Medicine, 81(1), 477-485. https://doi.org/10.1002/mrm.27375
MLA:
Gaspar, Andreia S., et al. "Optimizing maternal fat suppression with constrained image-based shimming in fetal MR." Magnetic Resonance in Medicine 81.1 (2019): 477-485.
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