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:
Dec. 23, 1997
Filed:
Nov. 29, 1995
Sylvia Heywang-Koebrunner, Engelsdorf, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A stereotactic auxiliary attachment for magnetic resonance examinations has an antenna arrangement for receiving magnetic resonance signals from an examination space, a holder for fixing an examination subject in the examination space and a marker arrangement in the detection region of the antenna arrangement having at least one chamber for containing a substance to provide a reference for localizing an object of interest in the examination subject. The at least one chamber is connected via lines to a refilling device. The refilling device is provided for filling the at least one chamber with a first substance or second substance, the two substances having different magnetic resonance behavior. The chamber is filled with one substance for production of a first MR tomogram, and this substance is then removed from the chamber and replaced with the second substance for producing a second MR tomogram. Since the substances have different magnetic resonance behavior, the marks in the first and second tomograms remain visible when a subtraction image is produced from those tomograms, so the localization information is not lost.