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Fig. 5B. Images of 52-year-old man show stairstep artifact. ECG trace
shows early R wave(arrowhead). Relative delay method has been used to
reconstruct images. Reconstruction is in diastole for first cardiac cycle.
Reconstruction overlaps systole for next cycle because of early R wave. Arrow
shows start of reconstruction of second image set. ECG trace can be edited to
delete this reconstruction. Double-headed arrows show relative delay.