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:
Mar. 25, 2014
Filed:
Nov. 23, 2010
Chunqi Qian, Tallahassee, FL (US);
Peter Gor'kov, Tallahassee, FL (US);
Chunqi Qian, Tallahassee, FL (US);
Peter Gor'kov, Tallahassee, FL (US);
The Florida State University Research Foundation, Inc., Tallahassee, FL (US);
Abstract
A four-ring birdcage coil having at least one moveable tuning ring for double resonance MRI includes low-pass configuration in both channels so that the HF mode only requires a small capacitance for resonance, enabling easy modification of a single resonance coil into a double resonance coil by incorporation of non-contact coupling rings whose capacitive coupling with the rungs generates enough capacitance to introduce the high-frequency resonance mode. The coil also includes at least one moving ring for broad range tuning in the HF channel. The LF channel is adjusted by a variable capacitor that is not directly connected to the coil, thus the frequency adjustment on each channel is independent. The HF channel is connected to the input cable by coupling capacitor. The LF channel is connected to the input cable by coupling inductor. This alternating driving scheme provides sufficient channel isolation and obviates the need for an external isolation network.