Title :
Phase aberration correction using near-field signal redundancy. II. Experimental results
Author :
Li, Yue ; Robinson, David ; Carpenter, David
Author_Institution :
Div. of Radiophys., CSIRO, Epping, NSW, Australia
fDate :
3/1/1997 12:00:00 AM
Abstract :
For pt.I see ibid., vol.44, no.2, pp.355-71. A phase-aberration correction algorithm using near-field signal redundancy was proposed in part I. Here, this algorithm is tested on data collected from phantoms and volunteers. A linear array transducer was used with a synthetic-aperture scanning system. A wedge of plastic gel was used to introduce phase aberrations when collecting data from a phantom. About 40 sets of RF data were collected from eight volunteers. Results from both phantom and volunteer data have shown that the near-field signal redundancy algorithm can improve image quality by correcting phase aberrations when they are present. The results also show that this algorithm is robust.
Keywords :
aberrations; acoustic correlation; biomedical ultrasonics; echo; image resolution; medical image processing; redundancy; ultrasonic transducer arrays; RF data; image quality; linear array transducer; near-field signal redundancy; phantoms; phase-aberration correction algorithm; plastic gel wedge; robust algorithm; synthetic-aperture scanning system; ultrasound medical imaging; volunteers; Image quality; Imaging phantoms; Phase measurement; Phased arrays; Radio frequency; Redundancy; Robustness; Signal analysis; Testing; Transducers;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on