Dual inversion recovery, ultrashort echo time (DIR UTE) imaging: creating high contrast for short-T(2) species.

摘要: Imaging of short-T2 species requires not only a short echo time (TE) but also efficient suppression long-T2 in order to maximize the contrast and dynamic range. This paper introduces method using two long adiabatic inversion pulses. The first pulse inverts magnetization water second one that fat. Short-T2 experience significant transverse relaxation during process, are minimally affected by Data acquisition with TE 8 μs starts following delay TI1 for inverted reach null point, TI2 fat point. depends on proper combination TI1, TR. It is insensitive RF inhomogeneities because feasibility this dual recovery ultrashort (DIR UTE) technique was demonstrated phantoms, cadaveric specimens healthy volunteers clinical 3T scanner. High image achieved deep radial calcified layers articular cartilage, cortical bone Achilles tendon.