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  • 1
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    Tissue identification by ultrasound (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The ultrasonic properties of animal and human soft tissue were measured over the frequency range of 1.5 to 10.0 MHz. The method employed a swept-frequency, coherent technique known as time delay spectrometry. Measurements of attenuation versus frequency on liver, backfat, kidney, pancreas, spleen, breast, and other tissue were made. Considerable attention was paid to tissue handling and in determining the effects of fixing on the attenuation of ultrasound in the tissue.
    Keywords: AEROSPACE MEDICINE
    Type: NASA-CR-157776 , JPL-PUB-78-90
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Medical ultrasonic tomographic system (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An electro-mechanical scanning assembly was designed and fabricated for the purpose of generating an ultrasound tomogram. A low cost modality was demonstrated in which analog instrumentation methods formed a tomogram on photographic film. Successful tomogram reconstructions were obtained on in vitro test objects by using the attenuation of the fist path ultrasound signal as it passed through the test object. The nearly half century tomographic methods of X-ray analysis were verified as being useful for ultrasound imaging.
    Keywords: AEROSPACE MEDICINE
    Type: NASA-CR-155269 , JPL-PUB-77-72
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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