Power Spectrum Consistency among Systems and Transducers.
Power Spectrum Consistency among Systems and Transducers.
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系统和传感器之间的功率谱一致性。
DOI：
10.1016/j.ultrasmedbio.2018.05.013
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发表时间：
2018-11
影响因子：
2.9
通讯作者：
Hall TJ
中科院分区：
文献类型：
--
作者：
Guerrero QW;Fan L;Brunke S;Milkowski A;Rosado-Mendez IM;Hall TJ
计算声衰减和后向散射的参考体模法已得到广泛应用。然而，由于需要获取参考体模数据，这些方法的临床应用受到限制。我们证明，从11个换能器的同一型号，和5个临床超声系统的同一型号的参考体模功率谱产生等效的估计数据。我们表明，系统和换能器之间的功率谱密度方差的贡献等于从散斑方差与59个不相关的回波信号。因此，当数据的不相关线的数量小时，散斑方差将主导由不同系统和换能器引入的PSD估计方差。这些结果表明，至少对于该特定换能器和成像系统组合，一组参考体模校准数据高度代表处于良好工作状态的等效换能器和系统的平均值。
The Reference Phantom Method for computing the acoustic attenuation and backscatter has become widespread. However, clinical application of these methods has been limited due to the need to acquire reference phantom data. We demonstrate that the data acquired from 11 transducers of the same model, and five clinical ultrasound systems of the same model produce equivalent estimates of reference phantom power spectra. We show that the contribution to power spectral density variance among systems and transducers equals that from speckle variance with 59 uncorrelated echo signals. Thus, when the number of uncorrelated lines of data is small, speckle variance will dominate the PSD estimate variance introduced by different systems and transducers. These results suggest that, at least for this particular transducer and imaging system combination, one set of reference phantom calibration data is highly representative of the average among equivalent transducers and systems that are in good working order.
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DOI：
10.1364/josaa.4.000910
发表时间：
1987-05-01
影响因子：
1.9
作者：
WAGNER, RF;INSANA, MF;BROWN, DG
通讯作者：
BROWN, DG
影响因子：
2.3
作者：
Nam, Kibo;Zagzebski, James A.;Hall, Timothy J.
通讯作者：
Hall, Timothy J.
影响因子：
2.9
作者：
Mamou, Jonathan;Coron, Alain;Oelze, Michael L.;Saegusa-Beecroft, Emi;Hata, Masaki;Lee, Paul;Machi, Junji;Yanagihara, Eugene;Laugier, Pascal;Feleppa, Ernest J.
通讯作者：
Feleppa, Ernest J.
影响因子：
2.9
作者：
Gibson, Allyson A.;Schaffer, Jean E.;Miller, James G.
通讯作者：
Miller, James G.
影响因子：
2.9
作者：
Hall, TJ;Insana, MF;Cox, GG
通讯作者：
Cox, GG