Rapid B1 Mapping Method Eliminating T1 Effect by Using Multi Td Sequence

Kosuke Ito¹, Masahiro Takizawa¹, Tetsuhiko Takahashi¹

A new fast B₁ mapping method (multi Td method) has developed. 3 images are used to calculate B₁ maps in this method, images acquired without pre-pulse, and images acquired at two different delay times (Td₁ and Td₂) from pre-pulse. The scan time is short due to the use of single shot scan. No approximation about T₁ relaxation is needed, and the dynamic range of B₁ map calculation is wide. Scan time is only 980 ms per slice.