Effects on B1+ and local specific absorption rate of varying the conductivity of fetal tissues and amniotic fluid ($$$\sigma_{AF}$$$) in a model of a 7 month pregnant woman within a 3T birdcage coil are investigated numerically. Results indicate that a realistic value of $$$\sigma_{AF}$$$ is required to estimate power to produce a chosen B1+ in the fetus and fetal SAR10g. Fetal properties adjusted for gestational age impact on B1+ and result in increased fetal SAR10g compared to adult value based simulations. Smaller changes in SAR10g are predicted between detailed fetal models and homogeneous ones with volume weighted average dielectric properties.
How to access this content:
For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.
After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.
After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.
Keywords