Bounding maps for universal lesion detection
International conference on medical image computing and computer-assisted …, 2020•Springer
Abstract (ULD) in computed tomography plays an essential role in computer-aided
diagnosis systems. Many detection approaches achieve excellent results for ULD using
possible bounding boxes (or anchors) as proposals. However, empirical evidence shows
that using anchor-based proposals leads to a high false-positive (FP) rate. In this paper, we
propose a box-to-map method to represent a bounding box with three soft continuous maps
with bounds in x-, y-and xy-directions. The bounding maps (BMs) are used in two-stage …
diagnosis systems. Many detection approaches achieve excellent results for ULD using
possible bounding boxes (or anchors) as proposals. However, empirical evidence shows
that using anchor-based proposals leads to a high false-positive (FP) rate. In this paper, we
propose a box-to-map method to represent a bounding box with three soft continuous maps
with bounds in x-, y-and xy-directions. The bounding maps (BMs) are used in two-stage …
Abstract
(ULD) in computed tomography plays an essential role in computer-aided diagnosis systems. Many detection approaches achieve excellent results for ULD using possible bounding boxes (or anchors) as proposals. However, empirical evidence shows that using anchor-based proposals leads to a high false-positive (FP) rate. In this paper, we propose a box-to-map method to represent a bounding box with three soft continuous maps with bounds in x-, y- and xy-directions. The bounding maps (BMs) are used in two-stage anchor-based ULD frameworks to reduce the FP rate. In the stage of the region proposal network, we replace the sharp binary ground-truth label of anchors with the corresponding xy-direction BM hence the positive anchors are now graded. In the stage, we add a branch that takes our continuous BMs in x- and y-directions for extra supervision of detailed locations. Our method, when embedded into three state-of-the-art two-stage anchor-based detection methods, brings a free detection accuracy improvement (e.g., a 1.68% to 3.85% boost of sensitivity at 4 FPs) without extra inference time.
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