Multi-echo sequence based MR imaging for fluid in motion
US6380739B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 2000 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Jan 10, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/5617
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An FSE-system multi-echo MRI pulse sequence is used to steadily depict objects such as blood flows without a contrast medium. The pulse sequence has a gradient pulse set such that, among the plurality of echoes, an amount M′ of a j-th (j=1, 1, 2, . . . ) gradient moment accumulated up to an n-th (n=1, 2, 3, . . . ) echo is approximately half an amount M (considered to be approximately constant when k≧n ) of the j-th gradient moment from a k-th (k=n, n+1, n+2, . . . ) echo to a “k+1”-th echo. This pulse sequence is performed and generated multi-echoes are acquired. An MR image is produced using echoes generated after the n-th echo among the acquired multi-echoes. For example, the n-th echo is an echo for n≧2 and a readout gradient to be applied during an interval down to the “n−1”-th echo is altered in time or amplitude, with a given gradient moment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.