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OBJECTIVE To improve the planning of hepatic surgery, we have developed a fully automatic anatomical, pathological, and functional segmentation of the liver derived from a spiral CT scan. MATERIALS AND METHODS From a 2 mm-thick enhanced spiral CT scan, the first stage automatically delineates skin, bones, lungs, kidneys, and spleen by combining the use of(More)
BACKGROUND Current surgical robots provide no sense of touch and rely solely upon vision. This study evaluated the effect of new stereoscopic technology on the performance of robotic precision laparoscopy. METHODS Eight experienced laparoscopists with no experience in robotics performed five tasks of increasing complexity using a laparoscopic robot. The(More)
In the last few years, radiofrequency ablation has become one of the most promising techniques to treat liver tumors. But radiol-ogists have to face the difficulty of planning their treatment while only relying on 2D slices. We present here a realistic radiofrequency abla-tion simulation tool, coupled with a 3D reconstruction and visualization project. They(More)
Medical image processing led to a major improvement of patient care. The 3D modeling of patients from their CT-scan or MRI thus allows a better surgical planning. Simulation offers the opportunity to train the surgical gesture before carrying it out. And finally, augmented reality provides surgeons with a view in transparency of their patient which, in the(More)
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(More)
—Surgical workflow recognition has numerous potential medical applications, such as the automatic indexing of surgical video databases and the optimization of real-time OR scheduling, among others. As a result, phase recognition has been studied in the context of several kinds of surgeries, such as cataract, neurological, and laparoscopic surgeries. In the(More)
To improve therapy research against cancer, we propose a robotized computer assisted system for needle insertion devoted to the small animal. The system is composed of a robotic arm on which the needle is attached and two cameras rigidly linked. It needs a preoperative CT acquisition in which the biologist defines an entry point and the target he wants to(More)
Pseudozyma aphidis is an environmental Basidiomycete yeast, and has been involved in the ten past years in rare cases of invasive infection. Pseudozyma species are naturally resistant to caspofungin and often present decreased susceptibility or resistance to fluconazole. This fungus may be difficult to recognize and misidentifications are reported with(More)
The reverse martensitic (" austenitic ") transformation upon heating of equiatomic nickel-titanium nanoparticles with diameters between 4 and 17 nm is analyzed by means of molecular-dynamics simulations with a semi-empirical model potential. After constructing an appropriate order parameter to distinguish locally between the monoclinic B19 at low and the(More)