http://www.ircad.fr/ en-us Copyright © WeBSurg IRCAD R-D videos podcasts powered by WeBSurg http://podcast.websurg.com/ircad_rd/index_header_logo.jpg http://podcast.websurg.com/ircad_rd/ WeBSurg - World Electronic Book of Surgery WeBSurg webmaster@websurg.com ircad, research, development, RD, Websurg, minimally invasive surgery, minimal invasive surgery, laparoscopic surgery, surgery, laparoscopy, robotic, Natural Orifice Transluminal Surgery, Notes, future of medecine, CT scan, CT, RM, IRM, HIFU, echographic, high technology, latest medical techniques, fw4spl, sofa, vtk, itk, sconspiracy, simulation, render, image processing, software, augmented reality ]]> http://podcast.websurg.com/ircad_rd/mobility/rdTeaserVisiblePatientBeta2.mp4 Tue, 24 Apr 2012 16:58:38 +0200 This video presents a US simulator (called HORUS), which needs a preoperative CT scan of the patient only and its associated 3D skin model from segmentation This video presents a US simulator (called HORUS), which needs a preoperative CT scan of the patient only and its associated 3D skin model from segmentation This video presents a US simulator (called HORUS), which needs a preoperative CT scan of the patient only and its associated 3D skin model from segmentation. The user manipulates a haptic feedback system (bottom left) to move the virtual US probe on the 3D model of the patient (right). (A haptic feedback provides the position of the virtual probe in space, and gives the feeling that the probe is touching the skin). Then, the software automatically computes the CT scan image corresponding to the virtual US probe position on the patient skin. An algorithm transforms in real-time this CT image in a simulated US image based on grey level analysis only. Note that the bones and the gas creates shadows as expected. A novice practitioner can then practice moving a US probe and analyse US image with this kind of simulator before an intervention, since it is based on patient data. He can also practice biopsies or tumour thermal-ablation, using a 2nd haptic system to manipulate the needle insertion. Hostettler A., Forest C., Forgione A., Soler L., Marescaux J. Real-Time Ultrasonography Simulator Based on 3D CT-Scan Images. Stud Health Technol Inform 2005;111:191-3. Forest C., Comas O., Vaysiere C., Soler L., Marescaux J. Ultrasound and needle insertion simulators built on real patient-based data. Stud Health Technol Inform 2007;125:136-139. Stephane Nicolau, Anant Vemuri, H.S. Wu et al. (2011) A low cost simulator to practice ultrasound image interpretation and probe manipulation: Design and first evaluation, 37–40. In IEEE International Symposium on VR Innovation (ISVRI), 2011. ]]> http://podcast.websurg.com/ircad_rd/simulation/rdEcho.mp4 Tue, 24 Apr 2012 11:42:42 +0200 ]]> http://podcast.websurg.com/ircad_rd/mobility/SkuldDroid.mp4 Tue, 24 Apr 2012 16:58:31 +0200 ]]> http://podcast.websurg.com/ircad_rd/fw4spl/VRMedNegato2D3D.mp4 Tue, 24 Apr 2012 17:03:30 +0200 L. Soler L. Soler 3D visualization of a patient suffering from an anterior right parathyroid tumour. By combining direct volume rendering and surface rendering of the 3D model done by IRCAD, accurate localization for a surgical intervention becomes possible. Furthermore, 3D modelling highlights a Dysphagia Lusoria, an abnormal development of aortic arches visible in a posterior view. This information is vital to guarantee the preservation of the recurrent nerve following the trajectory of the artery.]]> http://podcast.websurg.com/ircad_rd/vr_render/PARA_Atypique_WM480.mp4 Mon, 21 Nov 2011 10:17:16 +0100 Kinect presentation for research minister : Laurent Wauquiez Kinect presentation for research minister : Laurent Wauquiez ]]> http://podcast.websurg.com/ircad_rd/kinect/Altran_Ministre_MP4-480.mp4 Wed, 28 Sep 2011 11:32:21 +0200 Basic viewer based on FW4SPL for Maemo5]]> http://podcast.websurg.com/ircad_rd/mobility/SKULD_Maemo5.mp4 Wed, 28 Sep 2011 11:32:23 +0200 IRCAD IRCAD This video shows a complete augmented reality tracking system based on two cameras. Markers have been stuck on the phantom and has been CT-scanned. After a segmentation process performed with our software VR-Anat, a 3D model is available and can be registered in the stereoscopic camera frame, and thus superimposed in the video image. This registration is performed by minimization of a 3D/2D reprojection criterion [1].
The stereoscopic system also allows tracking any tool (needle, camera or laparoscopic instruments) thanks to a square marker attached to them. Obviously, both cameras are jointly calibrated in a same frame and the marker size is accurately known [2].
One can see at the end of the video the superimposition accuracy in the endoscopic view, which is within 2 mm (the diameter of the tube is 2 mm). Obviously, this sytem shows the feasibility of navigation on a rigid phantom only, and not on real human. We are currently working on patient movement compensation.
[1] Nicolau S., Pennec X., Soler L., Ayache N. An Accuracy Certified Augmented Reality System for Therapy Guidance ; Lecture Notes in Computer Sciences, European Conference on Computer Vision. ECCV 2004;LNCS 3023:79-91.
[2] Nicolau S.A., Goffin L., Soler L. A Low Cost and Accurate Guidance System for Laparoscopic Surgery: Validation on an Abdominal Phantom. Proceedings of ACM Symposium on Virtual Reality Software and Technology (VRST) 2005124-133. ]]> http://podcast.websurg.com/ircad_rd/augmented_reality/RA_RTA_augmented_reality.mp4 Thu, 05 May 2011 16:37:06 +0200 Altran and IRCAD Altran and IRCAD It's a proof of concept of Sofa engine integration in FW4SPL project. This video shows deformations with tools. You can also find this video on : youtube]]> http://podcast.websurg.com/ircad_rd/simulation/movie_poc04.mp4 Thu, 05 May 2011 16:22:03 +0200 IRCAD IRCAD This video presents an augmented reality system to guide liver puncture. The system is based on a stereoscopic tracking of patient and needle thanks to real-time image analysis. Radio-opaque markers stuck on the phantom skin allows its registration in the camera frame [1]. These markers are automatically extracted from CT preoperative acquisition and video images [2]. The needle tracking is performed thanks to a square marker attached on it, and tracked in the video image. A preliminary calibration phase allows to estimate the needle position with respect to the square marker.
The navigation software displays three screens [3]. The bottom left shows the augmented reality view of the registered phantom model and needle. The right screen provides an augmented virtuality view with the position of the needle and phantom models in the same frame. Finally the top left screen shows a virtual view corresponding to the needle axis. It allows an intuitive orientation of the needle toward the target (in this example, it is a marker stuck on the liver surface).
The system has been evaluated by surgeons and computer engineers. The targeting accuracy has been estimated to be within 2 mm [2]. Breathing motion uncertainty has been taken into account in a more recent work, including passive evaluation on patients [4].
[1] Nicolau, S., Pennec, X., Soler, L., and Ayache, N. (2003). Evaluation of a new 3D/2D registration criterion for liver radio-frequencies guided by augmented reality. Surgery Simulation and Soft Tissue Modeling. Volume 2673 of Lecture Notes in Computer Science (pp. 270-283). Springer.
[2] Nicolau, S., Garcia, A., Pennec, X., Soler, L., and Ayache, N. (2005). An augmented reality system to guide radio-frequency tumour ablation. Computer Animation and Virtual Worlds, 16(1), 1-10.
[3] Nicolau S., Schmid J., Pennec X., Soler L., Ayache N. An Augmented Reality and Vitually Interface for a Puncture Guidance System: Design and Validation on an Abdominal Phantom. Medical Imaging and Augmented Reality "MIAR 2004". Springer. LNCS 3150:pp. 302-310.
[4] Nicolau, S. a, Pennec, X., Soler, L., Buy, X., Gangi, A., Ayache, N., and Marescaux, J. (2009). An augmented reality system for liver thermal ablation: design and evaluation on clinical cases. Medical image analysis, 13(3), 494-506. ]]> http://podcast.websurg.com/ircad_rd/augmented_reality/RA_mars2004_2.mp4 Fri, 11 Mar 2011 10:32:47 +0100 Altran and IRCAD Altran and IRCAD It's a proof of concept of Sofa engine integration Kinect integration in FW4SPL project. This video shows a tools manipulation with Kinect and Sofa deformations]]> http://podcast.websurg.com/ircad_rd/kinect/PoC05Kinect.mp4 Mon, 24 Jan 2011 14:42:07 +0100 ]]> http://podcast.websurg.com/ircad_rd/vr_render/rdVRRender.mp4 Fri, 07 Jan 2011 08:32:06 +0100 ]]> http://podcast.websurg.com/ircad_rd/vr_render/rdVRRenderLuc.mp4 Fri, 07 Jan 2011 08:32:45 +0100 Video used in ComChannel Tutorial]]> http://podcast.websurg.com/ircad_rd/fw4spl/tutoComchannel.mp4 Fri, 07 Jan 2011 10:06:52 +0100 Altran and IRCAD Altran and IRCAD It's a proof of concept of Sofa engine integration in FW4SPL project. This video shows a manual registration with deformations ]]> http://podcast.websurg.com/ircad_rd/simulation/poc_manualRegistration.mp4 Fri, 07 Jan 2011 07:46:59 +0100 Altran and IRCAD Altran and IRCAD It's a proof of concept of Sofa engine integration in FW4SPL project. This video shows the first result with a single organ. You can also find this video on : youtube]]> http://podcast.websurg.com/ircad_rd/simulation/poc_monoorgane.mp4 Thu, 06 Jan 2011 20:26:58 +0100 Altran and IRCAD Altran and IRCAD It's a proof of concept of Sofa engine integration in FW4SPL project. This video shows the result with multiples organs. You can also find this video on : youtube]]> http://podcast.websurg.com/ircad_rd/simulation/poc_multiorganes.mp4 Thu, 06 Jan 2011 20:42:11 +0100