Figure 13
From: Deformable part models for object detection in medical images
Examples for detection results (initialization and result after convergence). Presently, the model does not contain the typical curvature close to the os sacrum. Detection was satisfactory but orientation of L5 was sometimes not correct when curvature was not supported from a strong signal at the spine (e.g., case 1). Including expected curvature of the spine might be necessary if the detection result is to be used as shape prior to segmentation.