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231223s1988 xx ||||| 00| ||eng c |
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|a pubmed25n0593.xml
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|a (DE-627)NLM177764880
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|a (NLM)18290124
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
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|a Manes, G
|e verfasserin
|4 aut
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|a Synchronous dynamic focusing for ultrasound imaging
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|c 1988
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 02.10.2012
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|a Date Revised 21.02.2008
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a An approach to dynamic focusing of ultrasound linear array scanners is presented, leading to the unique capability of implementing a focus that continuously tracks the return signal along the penetration depth. An electronically variable lens is obtained by a heterodyning process, in which the phases of echo signals at the array elements are equalized by mixing with suitable reference oscillations. These are generated by control of a single voltage-controlled oscillator, whose frequency is properly varied in synchronism with the delay of signal from different depths. The technique has been experimentally demonstrated by modifying the focusing processor of a conventional echographic linear scanner. Superior performances have been obtained with respect to fixed-focus operation mode. The image quality results are comparable with those of multizone-focus operation mode, in which the focus is varied over more transmit/receive cycles at the expense of lower frame rate
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|a Journal Article
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|a Tortoli, P
|e verfasserin
|4 aut
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| 700 |
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|a Andreuccetti, F
|e verfasserin
|4 aut
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|a Avitabile, G
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Atzeni, C
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t IEEE transactions on ultrasonics, ferroelectrics, and frequency control
|d 1986
|g 35(1988), 1 vom: 15., Seite 14-21
|w (DE-627)NLM098181017
|x 1525-8955
|7 nnns
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| 773 |
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|g volume:35
|g year:1988
|g number:1
|g day:15
|g pages:14-21
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|a GBV_ILN_350
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|a AR
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|d 35
|j 1988
|e 1
|b 15
|h 14-21
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