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Fig. 4C. —Sagittal images obtained through lateral femoral condyle in left knee of 39-year-old man with titanium fixation screw (arrow) in anterior cruciate ligament. Both steady-state free precession (SSFP) and spoiled gradient-echo show comparable signal deficits in vicinity of fixation hardware. Both B (water image) and C (fat image) were calculated using equation 3 in Appendix 1 from four source SSFP images and estimates of off-resonance map calculated with the modified local orientation filter.