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:
Jan. 02, 2001
Filed:
Apr. 27, 1999
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A method or apparatus for the simulation of electrical stimulations in an examination subject which are generated by rapidly switched gradient fields of an MR device, and wherein aborting of the executed measuring sequence occurs given the crossing of a threshold value in an online monitoring, wherein the crossing of the threshold value is signaled prior to the execution of the measuring sequence in a look-ahead monitoring, at least one gradient signal G(t) is determined which is defined by the time characteristic of the gradient pulses, at least one first filtered gradient signal G,(t) is formed by filtering the gradient signal G(t) with a first filtering function f,(t) a stimulation signal Stim(t) is formed which describes the stimulation of the examination subject, from the first filtered gradient signal G,(t), and the stimulation signal Stim(t) is compared to a definable stimulation threshold value Stim,. If Stim,is exceeded an indicator indicating that a stimulation has occurred is emitted.