Phase aberration correction using near-field signal redundancy. II.Experimental results

摘要

For pt.I see ibid., vol.44, no.2, pp.355-71. A phase-aberrationncorrection algorithm using near-field signal redundancy was proposed innpart I. Here, this algorithm is tested on data collected from phantomsnand volunteers. A linear array transducer was used with ansynthetic-aperture scanning system. A wedge of plastic gel was used tonintroduce phase aberrations when collecting data from a phantom. Aboutn40 sets of RF data were collected from eight volunteers. Results fromnboth phantom and volunteer data have shown that the near-field signalnredundancy algorithm can improve image quality by correcting phasenaberrations when they are present. The results also show that thisnalgorithm is robust