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Phase-enhancement Technique for a Hybrid-of-opposite-contrast Mr Angiography
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ikedo, Masato |
| Copyright Year | 2009 |
| Abstract | Introduction: A Flow-sensitive black-blood (FSBB) technique employing to 3D gradient echo (GRE) with motion-probing-gradient [1], and a MRA technique named Hybrid-of-opposite-contrast (HOP) MR angiography combining TOF and FSBB using dual-echo 3DGRE [2] were proposed. In addition, basic idea for correcting wraparound signal in vessels using phase-corrected real signal in FSBB was also proposed [3]. The purpose of this study was to propose and assess an advanced technique of image processing using phase and magnitude signal for further enhancing blood-to-background contrast for HOP sequence. Methods: A sequence of dual-echo 3D-GRE with flow-dephasing on both echoes and an image processing technique for phaseenhancement were combined. The enhancement process was as follows: First, the background phase was separated by subtracting lowfrequency phase from the original [3,4]; second, the normalized real part of corrected complex signal, ) cos( cor Φ , was obtained as: |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://cds.ismrm.org/protected/10MProceedings/files/1435_2963.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
