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231223s1988 xx ||||| 00| ||eng c |
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|a pubmed24n0593.xml
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|a (DE-627)NLM177765003
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|a (NLM)18290136
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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 Schafer, M E
|e verfasserin
|4 aut
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|a A computerized system for measuring the acoustic output from diagnostic ultrasound equipment
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|c 1988
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| 336 |
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|a Text
|b txt
|2 rdacontent
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| 337 |
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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| 338 |
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|a Band
|b nc
|2 rdacarrier
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| 500 |
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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 The measurement arrangement, which complies with the requirements of the US Food and Drug Administration, consists of a positioning system with a full range of degrees-of-freedom and a digital oscilloscope, both under complete computer control. The acoustic pressure-time waveform is recorded using membrane-type and needle-type polyvinylidene fluoride (PVDF) hydrophone probes. The overall bandwidth of the system depends on the hydrophone probe used and can range up to 100 MHz. A complete description of the system and the measurement procedures is given, along with a brief discussion of the various factors which affect measurement uncertainty. The largest overall uncertainty of the same associated with acoustic intensity measurements was determined to be no greater than 20% for I(sppa) and 25% for I(spta) (spatial peak pulse average intensity and spatial-peak temporal-average intensity, respectively). Other applications of the system include transducer characterization and research work in ultrasound dosimetry and bioeffects
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| 650 |
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|a Journal Article
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| 700 |
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|a Lewin, P A
|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), 2 vom: 15., Seite 102-9
|w (DE-627)NLM098181017
|x 1525-8955
|7 nnns
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| 773 |
1 |
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|g volume:35
|g year:1988
|g number:2
|g day:15
|g pages:102-9
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|a GBV_USEFLAG_A
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|a GBV_ILN_350
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| 951 |
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|a AR
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| 952 |
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|d 35
|j 1988
|e 2
|b 15
|h 102-9
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