Fetal MRI at Higher Field Strength
While fetal MRI has become a routine method at field strengths up to 1.5 T, the use of higher field strength is at an early stage. A higher signal-to-noise ratio is accompanied by a higher energy deposition. In addition, parameters of sequences have to be adjusted to achieve useful contrasts. Susceptibility effects and certain artifacts that increase with higher field strength have to be considered. The same is true for certain artifacts that maybe negligible at lower field strength. Special measures have to be taken to grant maternal and fetal safety. Due to the high resolution, MR imaging at 3 T is currently the method of choice in postmortem fetal imaging.
KeywordsMagnetic Field Strength High Field Strength Fetal Magnetic Resonance Imaging Main Magnetic Field Receiver Bandwidth
- Haacke EM, Brown RW, Thompson MR, Venkatesan R (1999) Magnetic resonance imaging - physical principles and sequence design, 1st edn. Wiley, New YorkGoogle Scholar
- Komori T, Narabayashi I, Matsumura K, Matsuki M, Akagi H, Ogura Y, Aga F, Adachi I (2007) 2-[Fluorine-18]-fluoro-2-deoxy-D-glucose positron emission tomography/computed tomography versus whole-body diffusion-weighted MRI for detection of malignant lesions: initial experience. Ann Nucl Med 21:209–215PubMedCrossRefGoogle Scholar