Active shape models—their training and application
Computer Vision and Image Understanding
ECCV '98 Proceedings of the 5th European Conference on Computer Vision-Volume II - Volume II
Vertebral shape: automatic measurement with dynamically sequenced active appearance models
MICCAI'05 Proceedings of the 8th international conference on Medical image computing and computer-assisted intervention - Volume Part II
Detecting Reduced Bone Mineral Density From Dental Radiographs Using Statistical Shape Models
IEEE Transactions on Information Technology in Biomedicine
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We describe improvements to a method of detecting patients at risk of osteoporosis from automatic measurement of the inferior mandibular cortex on panoramic dental tomograms. Previous work had used an Active Shape Model (ASM) to locate the mandibular edges. However, the edge-based ASM has little lateral positioning information and in osteoporotic cases the superior border is often poorly defined. These problems can degrade the accuracy of the measurements of cortical width. We have obtained superior accuracy using an Active Appearance Model incorporating a complex texture model derived from an osteoporotic-enriched training set. This leads to improvements in diagnostic accuracy, when applied to a large dataset of 663 subjects with known Bone Mineral Density.