With recent developments in gradient hardware even tissues with T2s down to tens of microseconds have become accessible for MRI. Hence, mapping signal decay or imaging short-T2 tissues selectively is of particular interest.
This can be performed using ultra-short echo time imaging with multiple TEs. However, for typical resolutions this approach is limited to T2s down to hundreds of microseconds.
In this work, the PETRA and HYFI techniques are utilized to map the signal decay of samples with T2s down to 54 μs. Considerably larger scan efficiency is obtained for the HYFI approach.