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首页> 外文会议>International Workshop on Digital Mammography(IWDM 2006); 20060618-21; Manchester(GB) >Use of Prompt Magnitude in Computer Aided Detection of Masses in Mammograms
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Use of Prompt Magnitude in Computer Aided Detection of Masses in Mammograms

机译：提示幅度在乳腺X线照片计算机辅助检测中的应用

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摘要

Systems for computer aided detection of masses may be used more effectively when they are used for interpretation of suspect abnormalities, instead of solely using them as a prompting aid to avoid oversights. To use CAD algorithms for detection of masses as a decision aid it may be helpful to display suspiciousness of regions computed by CAD. In this paper the quality of probabilities computed for masses by a commercial CAD system is studied in two ways: 1) by comparing standalone performance of the system to that of experienced screening radiologists, and 2) by determining results of independent double reading with CAD. The study involves results of 15 readers who each read 500 mammograms, and two releases of the CAD algorithm. Independent double reading results are obtained by combining probabilities of the CAD system with the reader assessment for each localized finding reported by the reader, and by computing the fraction of cancers localized correctly as a function of false positive referrals. It was found that standalone performance of CAD is less than that of any reader in the study. Nevertheless, it was found that performance improves significantly with independent CAD reading, and that use of an improved CAD algorithm lead to significantly better results of the combined reader with CAD.
机译：当将计算机用于质量检测的系统用于解释可疑异常时，可以更有效地使用它们，而不是仅将它们用作提示辅助工具以避免疏忽。要将CAD算法用于质量检测作为决策辅助工具，显示由CAD计算的区域的可疑性可能会有所帮助。在本文中，通过两种方式研究了由商用CAD系统计算的质量概率的质量：1）通过将系统的独立性能与有经验的放射线放射科医生的性能进行比较，以及2）通过使用CAD确定独立的重复读取结果。这项研究涉及15位阅读器的结果，每位阅读500幅乳房X线照片和两种版本的CAD算法。通过将CAD系统的概率与阅读器对每个阅读器报告的每个局部发现的评估相结合，并通过计算根据假阳性转诊而正确定位的癌症比例，可以获得独立的重复阅读结果。发现CAD的独立性能要比研究中的任何读者都要差。然而，发现使用独立的CAD读取可以显着提高性能，并且使用改进的CAD算法可以将具有CAD的组合读取器显着提高结果。

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