The effective management of technology must recognize that technology is embedded in social processes and that technology is shaped by both technical and social forces. This paper illustrates the study of technology through an examination of the interaction of these scientific, engineering, professional and social practices. Specifically we examine the case of computed tomography (CT) scanning,...

This paper considers the problem of reconstructing visually realistic 3D models of fire from a very small set of simultaneous views (even two). By modeling fire as a semi-transparent 3D density field, we show that fire reconstruction is equivalent to a severely under-constrained computerized tomography problem, for which traditional methods break down. Our approach is based on the observation t...

Since the introduction of clinical CT great improvements in scan time, patient comfort and resolution have been made. The first clinical CT scanner dates from 1972 and was developed by Godfrey Hounsfield. It required an acquisition time of 5 minutes and reconstruction of one image took 7 minutes . In the following years CT systems improved rapidly and by 1976 acquisition time for one CT image h...

Radiation therapy, an increasingly available and effective cancer treatment solution, involves sophisticated machinery as well as careful planning. Interactive 3D simulations combined with accurate 3D patient specific data can improve the planning process saving time and resources in generating the optimal treatment plan. We illustrate the potential of X3D in radiation therapy, specifically rad...

While CT imaging is excellent for demonstrating bone structures, it is unable to display an accurate rendition of the teeth. To address this problem, a method of incorporating accurate teeth into the CT scan was developed. This method combined a 3D CT bone model with digital dental models creating a “precise skull model”. An experiment was completed to test the accuracy with which the digital d...

This paper describes a valuable medical investigation method based on computed tomography. It’s about a modern solution for 3D modeling by using 2D descriptions of the considered organ or body. The 3D model will be generated based on data sets obtained by scanning the 2D image. The method is used to rebuild the anatomic organ, but it could be also used to virtually dissect the respective organ,...

We propose a workflow based on a combination of computed tomography, 3D images and 3D printing to analyse different archaeological material dating from the Iron Age, a weight axis, a helical piece, and a fibula. This workflow enables a preservative analysis of the artefacts that are unreachable because encased either in stone, corrosion or ashes. Computed tomography images together with 3D prin...

Many researchers have shown the ability of X-ray computer tomography (CT) of acquiring knowledge about the internal structure of logs. Contrarily to medical CT scanners, industrial CT scanners should satisfy more extreme constraints (in terms of speed, duty cycle, radiation safety, reconstruction circle and aperture size) in order to be used in a sawmill environment. All these factors lower the...

With recent advancements of technology, radiofrequency ablation has become one of the most used techniques to treat liver tumors. But radiologists still have to face the difficulty of planning their treatment while only relying on 2D slices acquired from CT-scan. We present in this paper a tool called RF-Sim, being part of a complete 3D reconstruction and visualization project, and including bo...

Generation and animation of realistic humans is an essential part of many projects in today’s media industry. Especially, the games and special effects industry heavily depend on realistic human animation. In this work a unified model that describes both, human pose and body shape is introduced which allows us to accurately model muscle deformations not only as a function of pose but also depen...