理解肝转移检测中的搜索与决策错误及降低辐射剂量的影响
Understanding Search and Decision Errors in Liver Metastasis Detection and the Effects of Lower Radiation Dose
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- Mayo Clinic（梅奥诊所）
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中文总结 AI 辅助
本研究整合三项读者研究，利用眼动追踪将肝转移漏检分为搜索错误和决策错误，并评估降低辐射剂量（120 vs 200 QRM）对两类错误的影响，发现剂量降低导致检测性能下降且漏检异质性明显。
中文摘要 AI 辅助
肝转移的检测性能随着辐射剂量的降低而下降，但漏检情况具有异质性。先前的眼动追踪研究将漏检的转移灶分为两类：搜索错误，即眼睛从未落在病灶上；以及决策错误，即病灶被看到但未被识别为恶性。我们整合了先前三项读者研究来回答这个问题。在所有研究中，放射科医生解读了同一组包含91个肝转移灶的40例增强腹部CT检查，这些转移灶的位置已被事先标记。在两项研究中，工作站记录了他们的注视和眼球运动。利用注视停留时间，转移灶被分类为搜索错误主导型（大多数漏检的注视时间<2秒）或决策错误主导型（注视时间>2秒）。在第三项研究中，十名放射科医生分别在120和200质量参考毫安秒（QRM）下解读检查。第三项研究未包含眼动追踪。在91个肝转移灶中，我们排除了16个在眼动追踪研究中从未被漏检的转移灶，并使用75个肝转移灶用于本研究。
英文摘要
The detection performance of liver metastases decreases with the reduction of radiation dose, but misses are heterogeneous. Previous eye tracking work has characterized missed metastases into two categories: search errors i.e., the eyes never land on the lesion, and decision errors i.e., the lesion is seen but not recognized as malignant. We integrated three prior reader studies to answer this question. In all studies, radiologists interpreted the same set of 40 contrast enhanced abdominal CT exams containing 91 liver metastases whose locations had been previously marked. In two studies, the workstation recorded their gaze and eye movements. Using eye dwell times, metastases were classified as search-error-dominant (majority of misses had <2 sec gaze time) or decision-error-dominant (>2 sec gaze time). In the third study, exams were interpreted both at 120 and 200 quality reference mAs (QRM) by ten radiologists. The third study did not include eye tracking. Out of 91 liver metastases, we excluded 16 that were never missed in the eye tracking studies and used 75 liver metastases for the present study.
