|
|||||
|
|
Fractional encoding of harmonic motions in MR elastography. |
|
| Authors: | Jens Rump Dieter Klatt Jürgen Braun Carsten Warmuth Ingolf Sack |
| Affiliation: | 1. Department of Radiology, Charité‐Universit?tsmedizin Berlin, Berlin, Germany;2. Institute of Medical Informatics, Charité‐Universit?tsmedizin Berlin, Berlin, Germany;3. Department of Radiology, Charité‐Universit?tsmedizin Berlin, Berlin, GermanyDepartment of Radiology, Charité‐Universit?tsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany=== |
| Abstract: | In MR elastography (MRE) shear waves are magnetically encoded by bipolar gradients that usually oscillate with the same frequency fv as the mechanical vibration. As a result, both the repetition time (TR) and echo time (TE) of such an MRE sequence are greater than the vibration period 1/fv. This causes long acquisition times and considerable signal dephasing in tissue with short transverse relaxation times. Here we propose a reverse concept with TR |
| Keywords: | balanced SSFP steady‐state elastography liver skeletal muscle myocardium interventricular septum |