Fig. 13
Adapted from Kim et al. [6]
Top: FIDDLE pulse sequence timing diagram. The primary components are the: (1) preparatory module (MT prep), (2) inversion recovery pulse, (3) phase-sensitive reconstruction, and (4) inversion time, such that blood magnetization is less than tissue magnetization (Black-blood Condition). See text for details. MT = magnetization transfer. Bottom: The adjustment of inversion time is based upon image appearance after the acquisition of the first test image using a nominal TI (e.g., ~ 200 ms). Operators can identify the optimal dark blood TI by identifying the maximum inversion time that results in a dark blood image.