摘要:
The present invention concerns a system for an automatic multimodal real-time tracking of moving instruments for image plane alignment inside a MRI scanner A system (1) comprising: - an MRI scanner (2), - an MRI multi-plane pulse sequence generating means allowing to interactively modify the position and orientation of one or several image planes in real-time, - one or several external optical sensors (3) with high frame rate, preferably a RGB-D sensor or an other similar camera system like a stereovision systems, - a multimodal marker (4) comprising at least one MR visible feature and one visual feature able to be tracked by both the MRI scanner (2) and the at least one external optical sensor (3), - a computer (5) able to process in real-time the images from both MRI and optical sensor in order to fuse the detected marker position and orientation or pose from both modalities, and predict the next image plane position and orientation based on the estimated motion of the moving marker (4).
摘要:
The invention relates to chlorine Guanabenz derivatives for treating prion-based diseases. More specifically, it relates to the use of the molecule of formula (I) wherein R = H or Cl and the phenyl group is at least substituted twice, or a pharmaceutically acceptable salt thereof, for the manufacture of a medicament for treating prion-based diseases.
摘要:
The invention relates to a method of producing a liquid crystal material. The inventive method is characterised in that it comprises the following steps consisting in: applying a first treatment to a liquid crystal mixture having a helical structure comprising a first non-photoreactive liquid crystal (A) and a second photoreactive liquid crystal (B), said first treatment modifying a handedness of the helix of the mixture; and applying a second treatment to the mixture such that the second liquid crystal (B) forms a polymer network, said second treatment being performed during all or part of the first treatment such that the liquid crystal material retains a memory of the modifications to the helix and the entire volume of the material has both a right-handed and left-handed helical structure. The invention also relates to a liquid crystal device comprising a liquid crystal material consisting of at least one liquid crystal having a helical structure, which is characterised in that the entire volume of the material has both a right-handed and left-handed helical structure, such that the device has a reflection rate of more than 50 %.
摘要:
The invention relates to a composite material comprising nanoparticles of at least one metal derivative and at least one type of carboxylic and/or sulfonic acid derivative organic compound chemically bound in a covalent manner with said nanoparticles by means of at least one carboxylic and/or sulfonic function.
摘要:
The invention relates to an electrostatic operating device, comprising a flexible electrode (30), with a first and a second end, at least one part of said electrode being mobile with relation to a substrate, two electrodes (32, 34), fixed with relation to the substrate (22) and means (18, 28), forming two pivots for the flexible electrode, arranged between the two ends of the flexible electrode.
摘要:
La présente invention a pour objet un dispositif de mesure électronique du type dosimètre pour déterminer la teneur en un composé radioactif de l'air. Ce dosimètre est constitué par un boîtier comprenant, d'une part, une chambre de collecte hermétique pourvue d'une anode et d'une cathode et, d'autre part, un compartiment technique renfermant les moyens de détection, de traitement du signal de détection et d'alimentation, dosimètre caractérisé en ce que la chambre de collecte (2) et le compartiment technique (6) sont séparés par une une paroi (7) comportant une fenêtre de mesure (8) au niveau de laquelle est montée ou formée une portion de paroi (9) autorisant le passage d'au moins certaines des particules alpha générées par le composé radioactif contenu dans le volume de gaz à analyser présent dans la chambre de collecte (2), cette portion de paroi (9) étant associée, du côté chambre de collecte (2), à un dispositif de cathode (4) et coopérant, du côté compartiment technique (6), avec des moyens de détection, de traitement et de discrimination et de comptage différencié d'au moins deux types de particules alpha.