Visualisation of urban airborne laser scanning data with occlusion images

Airborne Laser Scanning (ALS) was introduced to provide rapid, high resolution scans of landforms for computational processing. More recently, ALS has been adapted for scanning urban areas. The greater complexity of urban scenes necessitates the development of novel methods to exploit urban ALS to best advantage. This paper presents occlusion images: a novel technique that exploits the geometric complexity of the urban environment to improve visualisation of small details for better feature recognition. The algorithm is based on an inversion of traditional occlusion techniques

Thymic Hyperplasia with Lymphoepithelial Sialadenitis (LESA)-Like Features: Strong Association with Lymphomas and Non-Myasthenic Autoimmune Diseases.

Thymic hyperplasia (TH) with lymphoepithelial sialadenitis (LESA)-like features (LESA-like TH) has been described as a tumor-like, benign proliferation of thymic epithelial cells and lymphoid follicles. We aimed to determine the frequency of lymphoma and autoimmunity in LESA-like TH and performed retrospective analysis of cases with LESA-like TH and/or thymic MALT-lymphoma. Among 36 patients (21 males) with LESA-like TH (age 52 years, 32-80; lesion diameter 7.0 cm, 1-14.5; median, range), five (14%) showed associated lymphomas, including four (11%) thymic MALT lymphomas and one (3%) diffuse large B-cell lymphoma. One additional case showed a clonal B-cell-receptor rearrangement without evidence of lymphoma. Twelve (33%) patients (7 women) suffered from partially overlapping autoimmune diseases: systemic lupus erythematosus (n = 4, 11%), rheumatoid arthritis (n = 3, 8%), myasthenia gravis (n = 2, 6%), asthma (n = 2, 6%), scleroderma, Sjögren syndrome, pure red cell aplasia, Grave's disease and anti-IgLON5 syndrome (each n = 1, 3%). Among 11 primary thymic MALT lymphomas, remnants of LESA-like TH were found in two cases (18%). In summary, LESA-like TH shows a striking association with autoimmunity and predisposes to lymphomas. Thus, a hematologic and rheumatologic workup should become standard in patients diagnosed with LESA-like TH. Radiologists and clinicians should be aware of LESA-like TH as a differential diagnosis for mediastinal mass lesions in patients with autoimmune diseases

Association of microsomal epoxide hydrolase polymorphisms and lung cancer risk

lung cancer ris

NEWFOR : un progetto europeo dove il LiDAR è protagonista

International audienceKnowledge of spatial distribution of wood quantity and quality in a region along with information on forest accessibility and road network is a fundamental component for sustainable and efficient utilization of forest resources. In the Alpine region the role of accessibility analysis of forest areas is extremely important. Classic remote sensing techniques alone provide only part of the information which is necessary for a correct management of the resource. Laser scanning techniques provide added value by providing data which can be used to estimate volume, structure and accessibility. The objective of project NEWFOR (NEW technologies for a better mountain FORest timber mobilization) is to use laser scanning technology as support to forest management and harvesting for a more efficient and sustainable use of forest resources

NEWFOR - Un Progetto Europeo dove il LiDAR \ue8 Protagonista

I progetti europei di carattere transfrontaliero promuovono la collaborazione tra soggetti coinvolti in diverse tematiche che possono cos\uec avvantaggiarsi di sinergie mediante condivisione di approcci ed esperienze. Il dipartimento TeSAF dell\u2019Universit\ue0 degli Studi di Padova fa parte di un progetto nel quale gioca un ruolo fondamentale l\u2019utilizzo della tecnologia LiDAR applicata alla valutazione delle caratteristiche dei soprassuoli forestali e della loro accessibilit\ue0. L\u2019articolo riporta il profilo della parte di progetto relativa al laser scanning e le esperienze dei partner stranieri in merito