In this paper, a methodology is proposed for the geometric refinement of LiDAR building roof contours using high-resolution aerial images and Markov Random Field (MRF) models. The proposed methodology assumes that the 3D description of each building roof reconstructed from the LiDAR data (i.e., a polyhedron) is topologically correct and that it is only necessary to improve its accuracy. Since r...

A 68-year-old man without any structural heart disease underwent ablation of persistent atrial fibrillation in 2008 (isolation of 4 pulmonary veins and electrogram-based ablation of the posteroinferior left atrium) and 2009 (left pulmonary vein reisolation and linear ablation of the left atrial [LA] roof with demonstration of bidirectional block). Recently, he was referred for the ablation of r...

A strategy for building extraction and building reconstruction from dense LIDAR data is presented. Roofs are modeled as plane surfaces, connected along ridges and bordered by the eaves lines. Initial segmentation of terrain and non-terrain features is performed on grid data; after segmentation by region growing and region topology, classification is achieved based on a hierarchical set of aggre...

The increasing demand for a fast, efficient and low cost algorithm for extraction of 3D urban features was the motive behind this work. In this paper we present a new technique to reconstruct buildings with detailed roofs in urban areas using airborne laser scanning altimetry data. We have tried to show that dense airborne laser scanning data is sufficient for detailed 3D reconstruction of urba...

A 75-year-old man was referred to our hospital for investigation of a suspected mass in the left atrium (LA) and asymmetric septal hypertrophy of the left ventricle without significant obstruction detected by screening transthoracic echocardiography of atrial fibrillation (AF). Transesophageal echocardiography revealed dynamic smoke-like echo filling in LA and a cauliflower-like, large (22×16 m...

Carbon-neutral architectural design focuses on rationally utilizing the building’s surroundings to reduce its environmental impact. Resilient ventilation systems, developed according thermal comfort requirements of building energy-saving research, have few applications. We studied Jin-an Shopping Mall in Harbin and established middle point height (h), horizontal location (d), roof angle (α), ex...

We describe the case of a 21-year-old female patient with epithelioid haemangioendothelioma of the roof of the left atrium. The patient underwent radical resection of the tumour with large disease-free margins, which required reconstruction of left and right atrial superior walls. The prognosis is unpredictable, but life expectancies ranging from 1 to 20 years have been described. There is no s...

A 35-year-old man was admitted to Korea University Anam Hospital for evaluation of intermittent chest pain. Computed tomography of the chest showed enlargement of a previously identified anterior mediastinal mass and also a well-defined, circumscribed mass in the subcarinal area, surrounded by the roof of the left atrium, right pulmonary artery, and the carina. Complete resection of the intrape...

A 43-year-old man who had had a history of atrial septal defect (ASD) device closure 31 months previously presented with abrupt chest and back pain along with progressive cardiogenic shock and cardiac arrest. After resuscitation, he was diagnosed with cardiac tamponade. Diagnostic and therapeutic surgical exploration revealed left atrium (LA) perforation due to LA roof erosion from a deficient ...