Lung Field Segmentation in Chest Radiographs From Boundary Maps by a Structured Edge Detector

Lung Field Segmentation in Chest Radiographs From Boundary Maps by a Structured Edge Detector
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通过结构化边缘检测器根据边界图进行胸部 X 光照片中的肺场分割

DOI:
10.1109/jbhi.2017.2687939
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发表时间:
2018-05
影响因子:
7.7
通讯作者:
Wufan Chen
Wufan Chen
中科院分区:
工程技术1区
文献类型:
--
作者:
Wei Yang;Yunbi Liu;Liyan Lin;Zhaoqiang Yun;Qian Feng;Wufan Chen

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Lung field segmentation in chest radiographs (CXRs) is an essential preprocessing step in automatically analyzing such images. We present a method for lung field segmentation that is built on a high-quality boundary map detected by an efficient modern boundary detector, namely a structured edge detector (SED). A SED is trained beforehand to detect lung boundaries in CXRs with manually outlined lung fields. Then, an ultrametric contour map (UCM) is transformed from the masked and marked boundary map. Finally, the contours with the highest confidence level in the UCM are extracted as lung contours. Our method is evaluated using the public Japanese Society of Radiological Technology database of scanned films. The average Jaccard index of our method is 95.2%, which is comparable with those of other state-of-the-art methods (95.4%). The computation time of our method is less than 0.1 s for a $256\,\times \,256$ CXR when executed on an ordinary laptop. Our method is also validated on CXRs acquired with different digital radiography units. The results demonstrate the generalization of the trained SED model and the usefulness of our method.
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