The Normal Mode Analysis Shape Detection Method for Automated Shape Determination of Lung Nodules

Automated detection of lung nodules in CT images using shape-based genetic algorithm

A shape-based genetic algorithm template-matching (GATM) method is proposed for the detection of nodules with spherical elements. A spherical-oriented convolution-based filtering scheme is used as a pre-processing step for enhancement. To define the fitness function for GATM, a 3D geometric shape feature is calculated at each voxel and then combined into a global nodule intensity distribution. ...

Multinodular Goiter Hot Nodules with Amazing Shape of Thyroid

A 45-year-old female presented with symptoms of hyperthyroidism and hot nodules in the right lobe, which was diagnosed as nodular goiter by fine-needle aspiration. An anomalous thyroidectomy and difficult dissection with multiple rotations were performed around the trachea. As a remark, the pathology confirmed the presence of goiter with modular nodules (Figure 1). A macroscopic photograph show...

Shape-Measure Method for Solving Elliptic Optimal Shape Problems (Fixed Control Case)

TWO-STAGE METHOD FOR DAMAGE LOCALIZATION AND QUANTIFICATION IN HIGH-RISE SHEAR FRAMES BASED ON THE FIRST MODE SHAPE SLOPE

In this paper, a two-stage method for damage detection and estimation in tall shear frames is presented. This method is based on the first mode shape of a shear frame. We demonstrate that the first mode shape slope is very sensitive to the story stiffness. Thus, at the first stage, by using the grey system theory on the first mode shape slope, damage locations are identified in shear frames. Da...

Second order sensitivity analysis for shape optimization of continuum structures

This study focuses on the optimization of the plane structure. Sequential quadratic programming (SQP) will be utilized, which is one of the most efficient methods for solving nonlinearly constrained optimization problems. A new formulation for the second order sensitivity analysis of the two-dimensional finite element will be developed. All the second order required derivatives will be calculat...