Sonographic transducer performance cannot be evaluated with clinical images.
Sonographic transducer performance cannot be evaluated with clinical images.
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超声换能器性能无法通过临床图像进行评估。
DOI：
10.2214/ajr.137.6.1239
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
E. Mannes
中科院分区：
文献类型：
--
作者：
C. Jaffe;D. J. Harris;K. Taylor;G. Viscomi;E. Mannes
各种各样的体外测试（其中一些测试过于复杂而无法在临床环境中进行）可提供有关超声换能器性能的信息。然而，许多临床医生普遍认为，临床生成的体内图像是超声图像质量的必要且充分的测试。为了检查临床图像质量判断的灵敏度和可靠性，使用了一些未能通过复杂体外测试的换能器来创建临床扫描。在正常和异常换能器创建的临床图像之间的区分测试中，当缺陷仅发生在近场时，经验丰富的超声技师小组无法一致地识别具有波束均匀性重大缺陷的换能器进行的扫描。该研究证实，严格的体外测试提供了有关换能器性能的独特信息，并可以揭示常规临床图像中被忽视的性能缺陷。
A wide variety of in vitro tests, some too sophisticated to perform in a clinical setting, is available to provide information on the performance of sonographic transducers. However, it is a common belief among many clinicians that clinically generated in vivo images are a necessary and sufficient test of sonographic image quality. In order to examine the sensitivity and reliability of quality judgments made from clinical images, some transducers that failed elaborate in vitro tests were used to create clinical scans. In a discrimination test between clinical images created by normal and abnormal transducers, a panel of experienced sonographers was unable to consistently identify scans made by transducers with major flaws in the beam uniformity when the defect occurred only in the near field. The study confirms that rigorous in vitro tests provide unique information on transducer performance and can reveal performance flaws that are overlooked in routine clinical images.