Conical SPRITE

Fig. 3.4.6 Schematic description of the three-dimensional Conical-SPRITE technique. The Gx, Gy and Gz phase encode magnetic field gradients that are amplitude cycled to form a conical traverse through /(-space. A single data point is acquired from the FID after an rf excitation pulse at a fixed encoding time tp. TR is the time between rf pulses.

Conical-SPRITE MRI data sets obtained during co-current imbibition. The time interval between the two images was 10.5 min. The images show a piston-like water penetration. (E, F) 2D slices from a 3D Conical-SPRITE MRI data set obtained during counter-current imbibition. The overall water saturation was 26.3%. The penetrating waterfronts have not reached the sample center. Figure from Ref. [65] with permission. 

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