Figure 4 | Scientific Reports

Figure 4

From: Solid-state 31P and 1H chemical MR micro-imaging of hard tissues and biomaterials with magic angle spinning at very high magnetic field

Figure 4

(a) Picture (top view) of the phantom made of a PTFE insert with two cylindrical boreholes parallel to the spinning axis (1 mm in diameter) filled with HA and α-TCP powders. (b) 31P 2D MAS MR image of the phantom (projection along the zMAS axis) recorded with direct 31P single pulse excitation and TR = 360 s. (c) 31P 2D MAS selective image of the α-TCP phase, recorded with a 31P saturation comb and TR = 2 s. (d) 31P 2D CP MAS selective image of the HA phase, obtained using a CP time of 3 ms and TR = 1 s. The nominal spatial resolution for all images is 52 µm in the read dimension and 121 µm in the phase dimension (FOV = 3 × 3 mm2). 16 transients were co-added corresponding to an experimental time of (b) 51.2 hours, (c) 17 min and d) 8 min. The dataset was zero filled four times leading to a pixel size of 6*6 µm2.

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