✦ LIBER ✦
Response to “modeling the effects of patient motion in MRI data acquisition,” by Qing-San Xiang and R. Mark Henkelman
✍ Scribed by Qing-San Xiang; R. Mark Henkelman
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 128 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0740-3194
No coin nor oath required. For personal study only.
✦ Synopsis
Letters to the Editor
547 FIG. 2. Three vials of gel subject to z motion. Imaging parameters: Field Strength = 1.5 Tesla, TR = 500 ms, TE = 20 ms, field-of-view = 16 cm, slice thickness = 5 mm. Because each vial is uniform along the z axis, the same image is observed every TR seconds, yet there are ghosts. (a) The bright ghosts are due to the phase-accumulation effect. (b) The accumulated phase has been corrected, and the faint ghosts are due to T, relaxation effects.
- Because the model presented by Xiang and Henkelman only takes into account the current image, there is no way to model from where the object moved (needed for the REFERENCES TI and phase accumulation effect).