Learn More
Respiratory motion causes errors when planning and delivering radiotherapy treatment to lung cancer patients. To reduce these errors, methods of acquiring and using four-dimensional computed tomography (4DCT) datasets have been developed. We have developed a novel method of constructing computational motion models from 4DCT. The motion models attempt to(More)
As a scoping exercise in the design of our Social Machines Observatory we consider the observation of Social Machines "in the wild", as illustrated through two scenarios. More than identifying and classifying individual machines, we argue that we need to study interactions between machines and observe them throughout their lifecycle. We suggest that(More)
Although Social Machines do not have yet a formalized definition, some efforts have been made to characterize them from a ``machinery'' point of view. In this paper, we present a methodology by which we attempt to reveal the sociality of Social Machines; to do so, we adopt the analogy of stories. By assimilating a Social Machine to a story, we can identify(More)
A newly developed software module for computer-assisted surgery based on a commercially available navigation system allows simultaneous, independent registration of two fragments and real-time navigation of both fragments while reduction occurs. To evaluate the accuracy three fracture models were used: geometric foam blocks, a pelvic ring injury with(More)
Anatomic reduction of displaced fractures is limited by the chosen surgical approach and intraoperative visualization. Preoperative Computed Tomography (CT) enhances the analysis of the fracture pattern and provides accurate spatial relationships. Computer Assisted Surgery (CAS) was introduced to increase the accuracy of specific surgical procedures. CAS(More)
Displaced acetabular fractures are best treated with open reduction to achieve anatomic reduction and maximize the chance of a good functional outcome. Because of the anatomic complexity and often limited visualization, fracture reduction can be difficult. Virtual planning software can allow the surgeon to understand the fracture morphology and to rehearse(More)
BACKGROUND In selected patients with NSCLC the therapeutic index of radical radiotherapy can be improved with gating/tracking technology. Both techniques require real-time information on target location. This is often derived from a surrogate ventilatory signal. We assessed the correlation of two novel surrogate ventilatory signals with a spirometer-derived(More)
Introducing Social Machines as web-enabled entities integrating social energies and computational powers into a socio-technical system (whether purposeful or not) where social dynamics animate communities, this paper proposes a theoretical framework in which to observe them. Attempting to strike a balance between the roles of humans and non-humans, and(More)