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Festival des Arts Numériques Libres

WEASIS : A free web-based viewer aimed for telemedicine and general practitioners

Intervenant(s) : Nicolas Roduit, Francis Klumb

  • Langue : Français
  • Niveau : Débutant
  • Type d'événement : Conférence
  • Date : Mardi 12 juillet 2011
  • Horaire : 16h20
  • Durée : 40 minutes

Lieu : Bâtiment Droit - Eisenmann (amphi 1)

Résumé

PURPOSE : More and more, radiological images need to be distributed and quickly displayed within the hospital but also outside the hospital to general practitioners. Within computerized environments such access is increasingly based on web technologies. Therefore, there is a strong opportunity for a multipurpose web-based viewer that can address various clinical needs and offer customized analysis or measurement tools.

METHODS : WADO protocol has been chosen for communicating the radiological images. This protocol is part of the DICOM standard and it defines web based methods for accessing DICOM persistent objects from HTML pages. The WADO server provides a simple mechanism for getting DICOM objects through HTTP or secure HTTPs protocol, using the DICOM Unique Identifier (UID). WADO has been added to the DICOM standard in the early 2000s but it is still emerging : WADO-compliant viewers are very few on the market. Moreover, for a better integration into large telemedicine projects, our developments follow the IHE (Integrating the Healthcare Enterprise) recommendations and focus thus on the XDS-I profile. In that global services framework, the image communication becomes a part of the whole system that exchanges the patient documents. The image viewer is then considered as an XDS-I consumer. The WEASIS image viewer is the very first one in this category that is freely distributable to the medical community.

RESULTS : The Java-based WEASIS image viewer is multiplatform. It has been designed to meet several expectations of the clinical information system and its future evolution regarding medical imaging : providing a web-based access to the radiological images, as well as offering multimedia capabilities like displaying video (DICOM Mpeg-2) and digital photography. This viewer is optimized for web-based applications like telemedicine, and integrates multiple strategies for downloading images. Its plug-in based architecture offers a wide flexibility for real-time adding of new components, like data compression modules or specific image analysis tools. WEASIS can be easily interfaced to any PACS supporting WADO via a web portal or as an XDS-I consumer in IHE environment. It has been successfully interfaced to the open-source dcm4chee platform and commercial PACS. It is used in a clinical environment for distributing radiological images, videos and photography within and outside the hospital.

CONCLUSION : The viewing software Weasis is freely distributable, and our goal is to widely provide the medical and academic community with simple means of adding home-made clinical and research modules. Furthermore, it has very flexible configuration like viewing protocols adjustments or mouse and keyboard actions. We thus intend to enlarge the field of applications and follow the global evolutions of the medical imaging world.

Biographie

Dans le cadre de sa thèse de doctorat, Nicolas Roduit a développé en 2007 un logiciel libre d’analyse d’images géologiques, "JMicroVision", qui fait aujourd’hui référence dans le domaine de la pétrographie. En rejoignant les équipes de développement informatique des Hôpitaux Universitaires de Genève, il poursuit sa forte implication dans le monde du logiciel libre en concevant "Weasis", une visionneuse web multiplateforme d’images médicales, qui répond aux besoins grandissants de diffusion des examens radiologiques au sein et en dehors de l’hôpital pour une meilleure prise en charge du patient.

Francis Klumb a obtenu son doctorat dans le cadre du CERN à Genève en 1997, et s’est spécialisé dans le post-traitement des images par ses travaux à l’Ecole Polytechnique Fédérale de Lausanne. Il rejoint en 2001 les Hôpitaux Universitaires de Genève, où il contribue aux développements du logiciel "Osiris", véritable précurseur du logiciel libre dans le milieu médical, et prend ensuite la responsabilité d’un "pôle d’imagerie avancée". Il devient en novembre 2010 professeur d’imagerie médicale à la Haute Ecole de Santé de Genève.

Documents joints

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