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- W2150874891 abstract "We have demonstrated a significant, directionally dependent, anisotropic, echogenicity from the cortices of two sheep kidneys and a normal human cadaver kidney. The anisotropy corresponds to the relationship of the sound field to the medullary rays and interlobular arteries. At 7.5 MHz, the backscatter from specimens of cortex of a sheep kidney was 4.7 +/- .7 dB (mean +/- SEM) greater in parts of the cortex where the field was perpendicular to these structures as opposed to where it was parallel to them. In addition, we measured the angular distribution of this anisotropy and compared it to the 5 dB inclusion angle of the 5 MHz linear array that was used in measurements on the whole kidney specimens. The transducer inclusion angle was 10 degrees +/- 2 degrees, while the angular distribution was 34 degrees +/- 22 degrees and 23 degrees +/- 11 degrees (mean +/- SD) for the intact sheep and human kidney, respectively, demonstrating some variation of the medullary rays from perfect specular reflectors. This anisotropy should be visible in standard diagnostic scanning, and its recognition could increase ultrasound's sensitivity for the detection of renal disease." @default.
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- W2150874891 date "1988-01-01" @default.
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- W2150874891 title "Anisotropic ultrasonic backscatter from the renal cortex" @default.
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- W2150874891 doi "https://doi.org/10.1016/0301-5629(88)90112-3" @default.
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