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首页> 外文期刊>Ultrasound in Medicine and Biology >Regional variation in the measured apparent ultrasonic backscatter of mid-gestational fetal pig hearts.
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Regional variation in the measured apparent ultrasonic backscatter of mid-gestational fetal pig hearts.

机译：妊娠中期胎猪心脏超声表观超声反向散射的区域变化。

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摘要

The goal of this study was to characterize and compare regional backscatter properties of fetal hearts through measurements of the apparent integrated backscatter. Sixteen excised, formalin-fixed fetal pig hearts, representing an estimated 53 to 63 days of gestation, were investigated. Spatially localized measurements of integrated backscatter from these specimens were acquired using a 50 MHz single-element transducer. The apparent integrated backscatter measurements demonstrate different patterns of backscatter from the myocardium of the right ventricle compared with that of the left ventricle. These backscatter measurements appear to be consistent with the anisotropy of the fiber orientation observed in histologic assessment of the same specimens. For each of the 16 hearts, the apparent integrated backscatter from the right ventricular myocardium was larger than that from the left ventricular myocardium, exhibiting mean apparent backscatter values of -35.9 +/- 2.0 dB and -40.1 +/- 1.9 dB (mean +/- standard deviation; n = 16; p < 0.001), respectively. This study suggests that the intrinsic ultrasonic properties of the left and right ventricular myocardium are distinct in fetal pig hearts at mid-gestation.
机译：这项研究的目的是通过测量表观综合背向散射来表征和比较胎儿心脏的区域背向散射特性。对十六个切除的，用福尔马林固定的胎猪心脏进行了调查，这些胎儿代表着约53至63天的妊娠。使用50 MHz单元素换能器获取了来自这些标本的积分反向散射的空间局部测量结果。明显的整体反向散射测量结果表明，与左心室相比，右心室心肌的反向散射模式不同。这些反向散射测量结果似乎与在相同样本的组织学评估中观察到的纤维取向的各向异性一致。对于16个心脏中的每个心脏，右心室心肌的表观积分背向散射大于左心室心肌的表观积分背向散射，表现出平均表观背向散射值为-35.9 +/- 2.0 dB和-40.1 +/- 1.9 dB（平均值+ /-标准偏差; n = 16; p <0.001）。这项研究表明，妊娠中期胎猪心脏的左，右心室心肌固有超声特性是不同的。

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