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:
Apr. 25, 1989
Filed:
Apr. 19, 1988
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
An examination subject is irradiated with a sequence of RF pulses. Negative gradient pulses G.sub.z3 and G.sub.y4, as well as a phase-coding gradient G.sub.x2 are generated preceding each RF pulse. Negative gradient pulses G.sub.z2 and G.sub.y1, as well as a phase-coding gradient G.sub.x1, are generated following each RF pulse. The phase-coding gradient G.sub.x1 is inverted relative to the phase-coding gradient G.sub.x2. The negative gradient pulse G.sub.y1 is followed by a positive gradient pulse G.sub.y2 which serves as a read-out gradient during which a first signal S.sub.1 is received. A positive gradient pulse G.sub.y3 is generated preceding the negative gradient pulse G.sub.y4, the positive gradient pulse G.sub.y3 serving as a read-out gradient during which a second signal S.sub.2 is received. Two signals having different T.sub.2 weighting are thus obtained in each measuring sequence, without extending the measuring time. Two images having different T.sub.2 contrast, and thus increased diagnostic value, can thus be produced.