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231222s2003 xx ||||| 00| ||eng c |
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|a pubmed25n0417.xml
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|a (DE-627)NLM125127057
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|a (NLM)12744399
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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 |
1 |
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|a Yin, Xiangtao
|e verfasserin
|4 aut
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| 245 |
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|a Experimental spatial sampling study of the real-time ultrasonic pulse-echo BAI-mode imaging technique
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|c 2003
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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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| 500 |
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|a Date Completed 02.07.2003
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|a Date Revised 10.12.2019
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|a published: Print
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|a Citation Status MEDLINE
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|a The ultrasonic pulse-echo backscattered amplitude integral (BAI)-mode imaging technique has been developed to inspect the seal integrity of hermetically sealed, flexible food packages. With a focused 17.3-MHz transducer acquiring radio frequency (RF) echo data in a static rectilinear stop-and-go pattern, this technique was able to reliably detect channel defects as small as 38 microm in diameter and occasionally detect 6-microm-diameter channels. This contribution presents our experimental spatial sampling study of the BAI-mode imaging technique with a continuous zigzag scanning protocol that simulates a real-time production line inspection method in continuous motion. Two transducers (f/2 17.3 MHz and f/3 20.3 MHz) were used to acquire RF echo data in a zigzag raster pattern from plastic film samples bearing rectilinear point reflector arrays of varying grid spacings. The average BAI-value difference (deltaBAI) between defective and intact regions and the contrast-to-noise ratio (CNR) were used to assess image quality as a function of three spatial sampling variables: transducer spatial scanning step size, array sample grid spacing, and transducer -6-dB pulse-echo focal beam spot size. For a given grid size, the deltaBAI and CNR degraded as scanning step size in each spatial dimension increased. There is an engineering trade-off between the BAI-mode image quality and the transducer spatial sampling. The optimal spatial sampling step size has been identified to be between one and two times the -6-dB pulse-echo focal beam lateral diameter
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| 650 |
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|a Evaluation Study
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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| 650 |
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|a Validation Study
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| 700 |
1 |
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|a Morris, Scott A
|e verfasserin
|4 aut
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| 700 |
1 |
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|a O'Brien, William D
|c Jr
|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 1999
|g 50(2003), 4 vom: 21. Apr., Seite 428-40
|w (DE-627)NLM098181017
|x 0885-3010
|7 nnns
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| 773 |
1 |
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|g volume:50
|g year:2003
|g number:4
|g day:21
|g month:04
|g pages:428-40
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| 912 |
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|a GBV_USEFLAG_A
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| 912 |
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|a GBV_NLM
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|a GBV_ILN_22
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|a GBV_ILN_24
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|a GBV_ILN_350
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|a AR
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| 952 |
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|d 50
|j 2003
|e 4
|b 21
|c 04
|h 428-40
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