G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 33/34 (2006.01) A61B 5/055 (2006.01)
Patent
CA 2342047
A device, such as a medical device, having a distribution of microcoils may be used within an organism under Magnetic Resonant Imaging visualization. The distribution of microcoils on the device being selected from the group consisting of a) at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, at least one of the coils of said microcoils having at least one adjacent pair of windings on at least one microcoil in which a diameter of one winding on the at least one microcoil increases in winding diameter with respect to a diameter of an adjacent winding; b) at least one pair of radially opposed microcoils physically associated with the solid body, each microcoil having an outside microcoil diameter of 6mm or less, individual windings of said each microcoil together defining a geometric plane for each microcoil, and the plane of each microcoil being parallel to the plane of another microcoil in the pair of radially opposed microcoils; c) at least one RF receiver, the coils of said microcoils defining a cross-section that lies in a plane oriented at 0 to 80 degrees to the longest axis of the device; d) at least one wound microcoil with at least three windings on the microcoil, each winding having an aspect ratio of greater than one, the aspect ratio of each winding being measured as the ratio of longest to shortest dimension in a cross section situated approximately transverse to the winding axis of the coil windings, said winding axis also being transverse to the longest axis of said device; e) at least one microcoil in which a diameter of one winding on the at least one microcoil increases in winding diameter with respect to a diameter of an adjacent winding; f) diameters of at least three consecutive windings within a microcoils increase in diameter with respect to an adjacent winding while moving along the same direction parallel to an axis of the microcoil; g) an element having at least one RF receiver microcoil, the coils of said microcoils defining a cross-sectional contour having an alignment value of at least 0.75 with the longest axis of the device; h) said device is cylindrical, and in response to radiofrequency transmission, generates a reception field which has an average strength that diminishes by a factor of at least 10 from an area defined by a cylinder of 1.5 cm about a core axis of said cylindrical device to an area defined by a cylinder of 4.0 cm about the core axis of said cylindrical device; i) a solid body having at least one pair of opposed microcoils physically associated with the solid body, each microcoil having an outside microcoil diameter of 6mm or less, collective individual windings of said each microcoil defining a geometric plane, and the plane of each microcoil being parallel to the plane of another microcoil in the pair of opposed microcoils; j) a solid body having at least one pair of opposed microcoils physically associated with the solid body, each microcoil having an outside microcoil diameter of 6mm or less, at least 50 number % of individual windings of said each microcoil intersecting a geometric plane, and the geometric plane of each microcoil being parallel to the plane of another microcoil in the pair of opposed microcoils, and there being at least four windings within each microcoil in said at least one pair of opposed microcoils; k) a solid body having at least one pair of radially opposed microcoils physically associated with the solid body, each microcoil having an outside microcoil diameter of 6mm or less, with at least one pair of opposed microcoils physically associated with the solid body at a distal end, at least 50 number % of individual windings of said each microcoil lying within a geometric plane; 1) a solid body having at least one pair of radially opposed microcoils physically associated with the solid body, each microcoil having an outside microcoil diameter of 6mm or less, all individual windings of said each microcoil intersecting a geometric plane, and the plane of each microcoil being parallel to the plane of another microcoil in the pair of radially opposed microcoils; m) a solid body having at least one microcoil physically associated with the solid body, each microcoil having an outside microcoil diameter of 6mm or less, at least 50 number % of individual windings of said each microcoil intersecting a geometric plane perpendicular to an axis of said microcoil; and n) a solid body having at least one microcoil physically associated with the solid body, each microcoil having an outside microcoil diameter of 6mm or less and a common axis, with at least one microcoil physically associated with the solid body at a distal end, at least 50% of individual windings of said each microcoil intersecting a geometric plane perpendicular to said common axis.
Un dispositif, tel qu'un dispositif médical, ayant une distribution de microbobines peut être utilisé dans un organisme de visualisation d'imagerie par résonance magnétique. La répartition des microbobines sur l'appareil étant choisi dans le groupe constitué a) d'au moins une paire de microbobines réceptrices RF opposées ayant un espace entre chaque microbobine de ladite paire de microbobines, au moins une des bobines desdites microbobines ayant au moins une paire de bobinages adjacents sur au moins une microbobine où le diamètre d'un bobinage sur au moins une des microbobines augmente en diamètre de bobinage par rapport à un diamètre de bobinage adjacent; b) au moins une paire de microbobines radialement opposées et physiquement associées au corps solide, chaque microbobine ayant un diamètre extérieur de microbobine de 6mm ou moins, les bobinages individuels de chaque dite microbobine définissant ensemble une plane géométrique pour chaque microbobine, et la plane de chaque microbobine étant parallèle à la plane d'une autre microbobine dans la paire de microbobines radialement opposées; c) au moins un récepteur RF, les bobines de ladite microbobine définissant une section transversale qui se trouve sur une plane orientée de 0 à 80 degrés par rapport à l'axe le plus long du dispositif; d) au moins une microbobine enroulée avec au moins trois bobinages sur la microbobine, chaque bobinage ayant un aspect proportionnel supérieur à 1, l'aspect proportionnel de chaque bobinage étant mesuré comme la proportion de la dimension la plus longue par rapport à la plus courte dans une section transversale située environ transverse à l'axe d'enroulement des bobinages des bobines, ledit axe d'enroulement étant également transversalement au plus long axe dudit dispositif; e) au moins une microbobine où le diamètre d'un bobinage sur au moins une microbobine augmente en diamètre d'enroulement par rapport à un diamètre d'un bobinage adjacent; f) les diamètres d'au moins trois bobinages consécutifs à l'intérieur d'une microbobine augmentent en diamètre par rapport à un bobinage adjacent tout en se déplaçant le long de la même direction parallèle à un axe de la microbobine, g) un élément ayant au moins une microbobine réceptrice RF, les bobinages de ladite microbobine défnissant un contour transveral ayant une valeur d'alignement d'au moins 0,75 avec l'axe le plus long du dispositif; h) ledit dispositif est cylindrique, et en réponse à une transmission par radiofréquence, génère un champ de réception qui a une force moyenne qui diminue d'un facteur d'au moins 10 d'une zone définie par un cylindre de 1,5 cm autour d'un axe principal dudit dispositif cylindrique vers une zone définie par un cylindre de 4,0 cm autour de l'axe principal dudit dispositif cylindrique; I) un corps solide ayant au moins une paire de microbobines opposées et physiquement associées avec le corps solide, chaque microbobine ayant un diamètre extérieur de 6mm ou moins, des bobinages collectifs individuels de ladite microbobine définissant une plane géométrique, et la plane de chaque microbobine étant parallèle à la plane d'une autre microbobine dans la paire de microbobines opposées; j) un corps solide ayant au moins une paire de microbobines opposées et physiq
Raghavan Raghu
Viswanathan Raju R.
Image-Guided Neurologics Inc.
Smart & Biggar
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