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. Author manuscript; available in PMC: 2017 Mar 1.
Published in final edited form as: Magn Reson Med. 2015 May 2;75(3):1312–1323. doi: 10.1002/mrm.25754

Figure 2.

Figure 2

Vertical offset in measured ADC value is illustrated for individual system gradient channels (GX: blue, GY: green) and the trace (black) due to phantom positioning error (AP-elevation) in (a) versus (b), and due to cross-terms between diffusion and imaging gradients on slice-select channel (GX: blue, GZ: magenta) for sagittal (c) versus axial (d) scans. Solid horizontal lines mark the unbiased (known) ice-water ADC value. Dashed horizontal lines mark ±5% deviation. Head first, supine positioning was used for “Patient RL” direction assignment.