Intracranial microvascular imaging at 7 T MRI with transceiver RF coils.
Magn Reson Imaging
; 32(9): 1133-8, 2014 Nov.
Article
en En
| MEDLINE
| ID: mdl-25093629
ABSTRACT
PURPOSE:
To investigate intracranial microvascular images with transceiver radio-frequency (RF) coils at ultra-high field 7 T magnetic resonance imaging (MRI). MATERIALS ANDMETHODS:
We designed several types of RF coils for the study of 7 T magnetic resonance angiography and analyzed quantitatively each coil's performance in terms of the signal-to-noise ratio (SNR) profiles to evaluate the usefulness of RF coils for microvascular imaging applications. We also obtained the microvascular images with different resolutions and parallel imaging technique.RESULTS:
The overlapped 6-channel (ch) transceiver coil exhibited the highest performance for angiographic imaging. Although other multi-channel coils, such as 4- or 8-ch, were also suitable for fast imaging, these coils performed poorly in homogeneity or SNR for angiographic imaging. Furthermore, the 8-ch coil was poor in SNR at the center of the brain, while it had the highest SNR at the periphery.CONCLUSION:
The present study has demonstrated that the overlapped 6-ch coil with large-size loop coils provided the best performance for microvascular imaging or angiography with the ultra-high-field 7 T MRI, mainly because of its long penetration depth together with high SNR.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Procesamiento de Imagen Asistido por Computador
/
Encéfalo
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Imagen por Resonancia Magnética
Límite:
Humans
Idioma:
En
Revista:
Magn Reson Imaging
Año:
2014
Tipo del documento:
Article