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首页> 外文会议>Image Perception, Observer Performance, and Technology Assessment; Progress in Biomedical Optics and Imaging; vol.7 no.32 >Potential effect of CAD systems on the detection of actionable nodules in chest CT scans during routine reporting
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Potential effect of CAD systems on the detection of actionable nodules in chest CT scans during routine reporting

机译：在常规报告期间，CAD系统对胸部CT扫描中可检测到的结节的检测的潜在影响

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The purpose of the presented study was to determine the impact of two different CAD systems used as concurrent reader for detection of actionable nodules (> 4 mm) on the interpretation of chest CT scans during routine reporting. Fifty consecutive MDCT scans (1 mm or 1.25 mm slice thickness, 0.8 mm reconstruction increment) were selected from clinical routine. All cases were read by a resident and a staff radiologist, and a written report was available in the radiology information system (RIS). The RIS report mentioned at least one actionable pulmonary nodule in 18 cases (50%) and did not report any pulmonary nodule in the remaining 32 cases. Two different recent CAD systems were independently applied to the 50 CT scans as concurrent reader with two radiologists: Siemens LungCare NEV and MEDIAN CAD-Lung. Two radiologists independently reviewed the CAD results and determined if a CAD result was a true positive or a false positive finding. Patients were classified into two groups: in group A if at least one actionable nodule was detected and in group B if no actionable nodules were found. The effect of CAD on routine reporting was simulated as set union of the findings of routine reporting and CAD thus applying CAD as concurrent reader. According to the RIS report group A (patients with at least one actionable nodule) contained 18 cases (36% of all 50 cases), and group B contained 32 cases. Application of a CAD system as concurrent reader resulted in detection of additional CT scans with actionable nodules and reclassification into group A in 16 resp. 18 cases (radiologist 1 resp. radiologist 2) with Siemens NEV and in 19 resp. 18 cases with MEDIAN CAD-Lung. In seven cases MEDIAN CAD-Lung and in four cases Siemens NEV reclassified a case into group A while the other CAD system missed the relevant finding. Sensitivity on a nodule (> 4 mm) base was .45 for Siemens NEV and .55 for MEDIAN CAD-Lung; the difference was not yet significant (p = .077). In our study use of CAD as second reader in routine reporting doubled the percentage of patients with actionable nodules larger than 4 mm.
机译：本研究的目的是确定在常规报告过程中，用作同时读取器的两个不同CAD系统（用于检测可操作的结节（> 4 mm））对胸部CT扫描解释的影响。从临床常规中选择五十次连续的MDCT扫描（1毫米或1.25毫米切片厚度，0.8毫米重建增量）。所有病例均由一名住院医师和一名放射工作人员阅读，并且放射信息系统（RIS）中提供了书面报告。 RIS报告中提到18例中至少有一个可行的肺结节（50％），而其余32例中没有报告任何肺结节。作为两个放射线检查员的并发阅读器，两个不同的最新CAD系统被独立应用于50个CT扫描：西门子LungCare NEV和中位数CAD-Lung。两名放射科医生独立审查了CAD结果，并确定CAD结果是真阳性还是假阳性。将患者分为两组：在A组中，如果检测到至少一个可行的结节；在B组中，如果没有发现可行的结节。将CAD对例行报告的影响模拟为例行报告和CAD结果的集合的结合，因此将CAD用作并发阅读器。根据RIS报告，A组（具有至少一个可行结节的患者）包含18例（占全部50例的36％），而B组包含32例。 CAD系统作为并发阅读器的应用导致检测到具有可操作结节的其他CT扫描，并在16次中重新分类为A组。西门子NEV发生18例（放射科医生1例，放射科医生2例），其中19例。 MEDIAN CAD-Lung 18例。在7个案例中，MEDIAN CAD-Lung和4个案例中，西门子NEV将一个案例重新分类为A组，而其他CAD系统则没有找到相关的结论。对于西门子NEV，结节（> 4 mm）的灵敏度为.45，对于MEDIAN CAD-Lung的灵敏度为.55；差异尚未显着（p = .077）。在我们的研究中，在常规报告中使用CAD作为第二阅读器，可手术结节大于4 mm的患者百分比增加了一倍。

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