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. 24, 2009
Filed:
Dec. 28, 2007
Joerg Ulrich Fontius, Neunkirchen A. Brand, DE;
Juergen Nistler, Erlangen, DE;
Wolfgang Renz, Erlangen, DE;
Franz Schmitt, Erlangen, DE;
Karsten Wicklow, Bamberg, DE;
Joerg Ulrich Fontius, Neunkirchen A. Brand, DE;
Juergen Nistler, Erlangen, DE;
Wolfgang Renz, Erlangen, DE;
Franz Schmitt, Erlangen, DE;
Karsten Wicklow, Bamberg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
In a method and device for monitoring the physiologically effective radio-frequency exposure in at least one specific volume region of an examination subject in a magnetic resonance data acquisition scan in a magnetic resonance system, amplitude values are acquired that respectively represent, at specific acquisition points in time, a signal amplitude of the radio-frequency signals emitted or to be emitted via the radio-frequency signal channels. Also, phase values are acquired that represent the phases of the appertaining radio-frequency signals at these points in time. Local exposure values are then determined on the basis of the amplitude values and phase values, respectively representing a physiological exposure that the radio-frequency pulses cause at the examination subject at a specific location at a specific time. Based on this, exposure control values are determined that are compared with predetermined exposure limit values. When an exposure limit values is reached or exceeded, a control signal is output.