The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 2002
Filed:
Mar. 21, 2000
Raju R. Viswanathan, Towson, MD (US);
Raghu Raghavan, Baltimore, MD (US);
Image-Guided Neurologies, Inc., Melbourne, FL (US);
Abstract
A microcoil configuration, preferably on a medical device to be inserted into a patient, has an opposed pair of microcoils. At least one or each microcoil of the opposed pair of microcoils has at least a region where a diameter circumscribed by a first winding is greater than the diameter circumscribed by at least one complete second winding, especially an adjacent winding displaced from the first winding along an axis or core of the medical device or an axis of the microcoil. The second winding is nearer to or farther from an intermediate region between the microcoils that define the pair of microcoils. For example, it is common to have a connecting (usually straight or non-wound) lead between the two microcoils, and this lead may be used to define an intermediate region. The microcoil configuration with varying circumference between windings (especially adjacent windings) is generally referred to as a dumb-bell or horn configuration because of its general appearance and the individual microcoils are referred to as a horn microcoil, again because of the visual appearance of the microcoil. The configuration of the microcoils assists in defining the properties of an RF responsive field adjacent to the device.