Document Detail

Filter-based synthetic transmit and receive focusing.
MedLine Citation:
PMID:  11775775     Owner:  NLM     Status:  MEDLINE    
Most diagnostic ultrasonic imaging systems perform fixed focusing on transmit and dynamic focusing on receive. Such systems suffer from image quality degradation at depths away from the transmit focal zone. Several dynamic transmit focusing techniques have been previously investigated. Among them, a filter-based, retrospective focusing technique was proposed to increase the length of the transmit focal zone. In this paper, the filter-based technique is extended from dynamic receive focusing to fixed receive focusing. It is shown that the filtering technique with fixed receive focusing can achieve an image quality similar to that of dynamic receive focusing with filtering. The performance of the proposed approach is verified using real ultrasound data. It is shown that the proposed approach with fixed receive focusing requires a longer filter than that with dynamic receive focusing. Nonetheless, system complexity is greatly reduced with synthetic transmit and receive focusing because the dynamic receive focusing circuit is no longer needed.
M L Li; P C Li
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ultrasonic imaging     Volume:  23     ISSN:  0161-7346     ISO Abbreviation:  Ultrason Imaging     Publication Date:  2001 Apr 
Date Detail:
Created Date:  2002-01-01     Completed Date:  2002-03-06     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7909167     Medline TA:  Ultrason Imaging     Country:  United States    
Other Details:
Languages:  eng     Pagination:  73-89     Citation Subset:  IM    
Department of Electrical Engineering, National Taiwan University, Tapei, ROC.
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MeSH Terms
Phantoms, Imaging
Retrospective Studies
Ultrasonography / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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