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Magnetic Resonance Materials in Physics, Biology and Medicine

Erschienen in:

01.10.2014 | Research Article

ViP MRI: virtual phantom magnetic resonance imaging

verfasst von: Hervé Saint-Jalmes, Pierre-Antoine Eliat, Johanne Bezy-Wendling, Alejandro Bordelois, Giulio Gambarota

Erschienen in: Magnetic Resonance Materials in Physics, Biology and Medicine | Ausgabe 5/2014

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Abstract

Object

The ability to generate reference signals is of great benefit for quantitation of the magnetic resonance (MR) signal. The aim of the present study was to implement a dedicated experimental set-up to generate MR images of virtual phantoms.

Materials and methods

Virtual phantoms of a given shape and signal intensity were designed and the k-space representation was generated. A waveform generator converted the k-space lines into a radiofrequency (RF) signal that was transmitted to the MR scanner bore by a dedicated RF coil. The k-space lines of the virtual phantom were played line-by-line in synchronization with the magnetic resonance imaging data acquisition.

Results

Virtual phantoms of complex patterns were reproduced well in MR images without the presence of artifacts. Time-series measurements showed a coefficient of variation below 1 % for the signal intensity of the virtual phantoms. An excellent linearity (coefficient of determination r ² = 0.997 as assessed by linear regression) was observed in the signal intensity of virtual phantoms.

Conclusion

Virtual phantoms represent an attractive alternative to physical phantoms for providing a reference signal. MR images of virtual phantoms were here generated using a stand-alone, independent unit that can be employed with MR scanners from different vendors.

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Titel: ViP MRI: virtual phantom magnetic resonance imaging
verfasst von: Hervé Saint-Jalmes
Pierre-Antoine Eliat
Johanne Bezy-Wendling
Alejandro Bordelois
Giulio Gambarota
Publikationsdatum: 01.10.2014
Verlag: Springer Berlin Heidelberg
Erschienen in: Magnetic Resonance Materials in Physics, Biology and Medicine / Ausgabe 5/2014
Print ISSN: 0968-5243
Elektronische ISSN: 1352-8661
DOI: https://doi.org/10.1007/s10334-013-0425-0

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ViP MRI: virtual phantom magnetic resonance imaging