 |
 |
 |
Journal articles
Fat ViP MRI: Virtual Phantom Magnetic Resonance Imaging of water-fat systems
Abstract : OBJECT: Virtual Phantom Magnetic Resonance Imaging (ViP MRI) is a method to generate reference signals on MR images, using external radiofrequency (RF) signals. The aim of this study was to assess the feasibility of ViP MRI to generate complex-data images of phantoms mimicking water-fat systems. MATERIALS AND METHODS: Various numerical phantoms with a given fat fraction, T2* and field map were designed. The k-space of numerical phantoms was converted into RF signals to generate virtual phantoms. MRI experiments were performed at 4.7T using a multi-gradient-echo sequence on virtual and physical phantoms. The data acquisition of virtual and physical phantoms was simultaneous. Decomposition of the water and fat signals was performed using a complex-based water-fat separation algorithm. RESULTS: Overall, a good agreement was observed between the fat fraction, T2* and phase map values of the virtual and numerical phantoms. In particular, fat fractions of 10.5±0.1 (vs 10% of the numerical phantom), 20.3±0.1 (vs 20%) and 30.4±0.1 (vs 30%) were obtained in virtual phantoms. CONCLUSION: The ViP MRI method allows for generating imaging phantoms that i) mimic water-fat systems and ii) can be analyzed with water-fat separation algorithms based on complex data
Cited literature [26 references]
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01260571
Contributor : Laurent Jonchère <>
Submitted on : Sunday, March 6, 2016 - 7:44:01 PM
Last modification on : Thursday, January 14, 2021 - 11:17:05 AM
Long-term archiving on: : Sunday, November 13, 2016 - 8:12:12 AM
Contributor : Laurent Jonchère <>
Submitted on : Sunday, March 6, 2016 - 7:44:01 PM
Last modification on : Thursday, January 14, 2021 - 11:17:05 AM
Long-term archiving on: : Sunday, November 13, 2016 - 8:12:12 AM