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:
Jun. 16, 1998
Filed:
May. 31, 1996
Christopher W Crowley, San Diego, CA (US);
Freeman H Rose, Jr, Del Mar, CA (US);
Panacea Medical Laboratories, Carlsbad, CA (US);
Abstract
A method for maintaining encoded coherence for a remotely positioned MRI device is accomplished in groups of pulses. Each group includes four sequences of pulses and each sequence includes a tilting phase, an encoding phase and a recording phase. Specifically, each sequence begins with a 90.degree. tilting pulse. The encoding phase, which follows, is characterized by a time interval between refocusing 180.degree. pulses which is of sufficient duration to permit effective encoding of the material to be imaged. On the other hand, the recording phase, which follows the encoding phase, is characterized by a time interval between refocusing 180.degree. pulses which is shorter in duration in order to maintain encoded coherence during imaging. Within any group of pulses, there are four individually different sequences which result by shifting the phases of the refocusing pulses from sequence to sequence to provide 180.degree..sub..+-.x and 180.degree..sub..+-.y refocusing pulses.