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:
Feb. 20, 2007
Filed:
Nov. 08, 2005
Kenichi Kanda, Tokyo, JP;
Kenichi Kanda, Tokyo, JP;
GE Medical Systems Global Technology Company, LLC, Waukesha, WI (US);
Abstract
For the purpose of providing an MRI apparatus which gives rise to no phase deviation due to frequency alteration of the RF magnetic field and signals for detection use, the MRI apparatus includes: signal collecting means which detects and collects magnetic resonance signals generated by applying a magnetostatic field, a gradient magnetic field and an RF magnetic field onto an object; frequency altering means which alters the frequency of the RF magnetic field and the frequency of signals for detection use in accordance with change in the Larmor frequency with time; and image reconstructing means which reconstructs an image on the basis of the collected signals, and further comprises: phase control means which sets as the phase at the time of starting detection of signals for detection use a phase Δθ given by a relational expression Δθ=2π·Δf·T using the difference Δf between the frequency altered by the frequency altering means and a reference frequency, and a time period T from the start of applying the RF magnetic field to the start of detection of magnetic resonance signals.