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Title: Method and apparatus for magnetic resonance imaging and spectroscopy using microstrip transmission line coils

Patent ·
OSTI ID:1175690

Apparatus and method for MRI imaging using a coil constructed of microstrip transmission line (MTL coil) are disclosed. In one method, a target is positioned to be imaged within the field of a main magnetic field of a magnet resonance imaging (MRI) system, a MTL coil is positioned proximate the target, and a MRI image is obtained using the main magnet and the MTL coil. In another embodiment, the MRI coil is used for spectroscopy. MRI imaging and spectroscopy coils are formed using microstrip transmission line. These MTL coils have the advantageous property of good performance while occupying a relatively small space, thus allowing MTL coils to be used inside restricted areas more easily than some other prior art coils. In addition, the MTL coils are relatively simple to construct of inexpensive components and thus relatively inexpensive compared to other designs. Further, the MTL coils of the present invention can be readily formed in a wide variety of coil configurations, and used in a wide variety of ways. Further, while the MTL coils of the present invention work well at high field strengths and frequencies, they also work at low frequencies and in low field strengths as well.

Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Organization:
USDOE
Assignee:
Regents of the University of Minnesota (Minneapolis, MN)
Patent Number(s):
7,023,209
Application Number:
09/974,184
OSTI ID:
1175690
Country of Publication:
United States
Language:
English

References (13)

A microstrip transmission line volume coil for human head MR imaging at 4T journal April 2003
Microstrip RF surface coil design for extremely high-field MRI and spectroscopy journal January 2001
Coupled microstrip line transverse electromagnetic resonator model for high-field magnetic resonance imaging journal February 2002
Active Antennas book December 1999
Stripline Components book December 1999
A dual-frequency compact microstrip patch antenna journal November 2001
Triaxial magnetic field gradient system for microcoil magnetic resonance imaging journal January 2000
Influence of dielectric substrate on the responsivity of microstrip dipole-antenna-coupled infrared microbolometers journal January 2002
Dual-Polarization Star Microstrip Antennas conference October 2001
Nonlinear behavior of electromagnetic waves in the YIG film microstrip line conference January 1998
Extended analysis of closed-ring microstrip antenna journal February 1989
Microwave Circuits book December 1999
Measurements of the effective electrodynamical parameters of Nb microstrip resonator journal November 2000

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