The purpose of this study was to evaluate quantitatively the patient-specific 3D dosimetry tool COMPASS with 2D array MatriXX detector for stereotactic volumetric-modulated arc delivery. Twenty-five patients CT images and RT structures from different sites (brain, head & neck, thorax, abdomen, and spine) were taken from CyberKnife Multiplan planning system for this study. All these patients...

BACKGROUND The occurrence of mandibular defects caused by tumors has been continuously increasing in China in recent years. Conversely, results of the repair of mandibular defects affect the recovery of oral function and patient appearance, and the requirements for accuracy and high surgical quality must be more stringent. Digital techniques--including model reconstruction based on medical imag...

BACKGROUND PET/CT scans acquired in the radiotherapy treatment position are typically performed without compensating for respiratory motion. The purpose of this study was to investigate geographic miss of lung tumours due to respiratory motion for target volumes defined on a standard 3D-PET/CT. METHODS 29 patients staged for pulmonary malignancy who completed both a 3D-PET/CT and 4D-PET/CT we...

Conventional crude oil, as the current dominant energy source, is an unrenewable resource. Despite the improvement of alternative energy technology such as wind and solar, there is still a large gap between the capability of these systems for supplying energy and global energy requirements. Therefore, until technological innovations facilitate sufficient energy generation through alternative fu...

The representation of figures in mongean projection (double system planned orthographic projection used in the studies of Descriptive Geometry), specially when placed in a particular situation in relation to the projection plans, possesses the quality that, through them, the actual dimensions of represented spatial objects can be found directly and without additional geometric constructions. Ho...

CONSTRUCTION INDUSTRY HAS made great strides toward a safe working environment. Although many construction companies have comprehensive safety plans, a plan’s quality does not necessarily correlate to the company’s safety performance. Written safety plans can be effective, but companies must go beyond the letter of the plan and create a true “safety culture” (Hinze 101). This study explored the...

T is little understanding as to why firms have various degrees of cell usage. The intent of this study was to identify factors that had arrested continued implementation of cells at surveyed manufacturing plants. We found no dominant factor that had prevented the firms from continued cellularization. However, by sub-dividing the plants into those with low and high degrees of direct labor hours ...

during dental education, dental students learn how to examine patients, make diagnosis, plan treatment and perform dental procedures perfectly and efficiently. however, progresses in computer-based technologies including virtual reality (vr) simulators, augmented reality (ar) and computer aided design/computer aided manufacturing (cad/cam) systems have resulted in new modalities for instruction...

Abstract Under the scheme of Japanese City Renewal Law (JCRL), the cost of urban redevelopment project has been financed by the revenue from selling the reservation floor secured beforehand in the redeveloped building. Since the outcome of whether or not the reservation floor can be sold is unforeseeable, entities for redevelopment are faced with the risk for project financing. Traditional risk...

Urban landscapes and their possible changes can be visually represented in 3D Geovisualization. In this study, forthcoming changes at Aalborg University, Denmark, have been visualized in three different visual representations: a 2D Plan View, a simple 3D Model View and a photorealistic 3D World View. Ten subjects and two expert evaluators have been consulted with the purpose of studying the use...