Title :
Artifacts and artifact reduction in sonoelastography
Author :
Taylor, L.S. ; Rubens, D.J. ; Parker, Kevin J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Rochester Univ., NY, USA
Abstract :
A technique for reducing vibration artifacts encountered when using pure tone vibration in vibration amplitude sonoelastography is presented. Multi-tone signals were designed to synchronize with the pulse repetition frequency and packet size of the scanner. When applied to phantoms with known uniform elasticity it was found that noise levels using the multi-tone signals were 28 to 35% less than when pure tone vibration was used. Images of a hard phantom lesion made using multi-tone vibration compared favorably with those using pure tone vibration
Keywords :
Hilbert spaces; biomechanics; biomedical ultrasonics; eigenvalues and eigenfunctions; elasticity; medical image processing; motion estimation; tumours; vibrations; Hilbert space; artifact reduction; eigenmodes; hard phantom lesion; modal artifacts; multi-tone signals; noise levels; pulse repetition frequency; pure tone vibration; real time technique; scanner packet size; shear modulus; tumour visibility; uniform elasticity phantoms; vibration amplitude sonoelastography; vibration artifacts; Elasticity; Frequency synchronization; Imaging phantoms; Interference; Lesions; Magnetic resonance imaging; Neoplasms; Radiology; Reflection; Signal design;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.921684
