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. Author manuscript; available in PMC: 2016 Jul 27.
Published in final edited form as: NMR Biomed. 2015 Sep 16;28(11):1426–1432. doi: 10.1002/nbm.3388

Table 1.

Subjective assessment of comfort and operator convenience of mechanical drivers in cerebral multifrequency MR elastography (mMRE) by 12 healthy volunteers and three operators. Values in parentheses denote the standard deviation (SD) and the range of the values

Remote actuation Head cradle
Assessment of discomfort by the volunteer (1, negligible; 5, very uncomfortable)
Vibration 2.1 (0.7; 2–4) 2.9 (0.8; 2–4)
Positioning (constriction, cushions, head pad) 2.4 (1.0; 1–4) 2.8 (0.8; 2–4)
Acoustic noise (relative to the scanner’s gradient system) 1.7 (0.9; 1–3) 2.4 (0.7; 1–3)
Mean score 2.1 (0.4) 2.7 (0.3)
Assessment of effort by three operators (1, no additional effort; 5, hard to implement)
Patient instruction 1, 2, 1 3, 3, 3
Patient positioning 2, 2, 2 3, 3, 2
Actuator set-up 2, 2, 2 2, 2, 2