Method and apparatus using post contrast-enhanced steady-state free precession in MR imaging
US6493569B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 30, 2000 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | May 7, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/5613
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method are disclosed that use the steady-state free precessing (SSFP) technique for MR imaging to allow the acquisition of MR angiography images in which the acquisition is not time dependent upon the first passage of a contrast agent. The technique includes applying a pulse sequence with refocusing S− signals from a train of RF pulses to a desired field-of-view (FOV) in a patient in which a contrast bolus has been injected. An SSFP image of the desired FOV is acquired, together with an S− SSFP mask image of the desired FOV. The S− SSFP mask image is subtracted from the SSFP image in order to reconstruct an image with improved visualization of the arterial and venous structures and reduce mis-registration artifacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.