RESUMEN
PURPOSE: This study extends the Fast ROtary Nonlinear Spatial ACquisition (FRONSAC) method to include 3D acquisitions and reconstructions. It uses a transform domain reconstruction which is needed to make 3D reconstructions practical and provides new insights into how parallel imaging performance is enhanced by FRONSAC encoding. METHODS: This work developed the first examples of FRONSAC incorporated into a 3D acquisition. 3D FRONSAC was tested on human subjects with both simple gradient echo and MPRAGE Cartesian acquisitions. The quality of the 3D FRONSAC images was evaluated using structural similarity index measure (SSIM), and normalized root mean square error (NRMSE). RESULTS: FRONSAC encoding did not significantly modify the contrast obtained in either sequence, but it substantially improves the image quality of undersampled reconstruction. FRONSAC images have reduced undersampling ghosts and consistently improved SSIM and NRMSE. CONCLUSIONS: Acquisition and reconstruction of 3D FRONSAC images are feasible, and the additional FRONSAC encoding improves image quality in highly undersampled images.
Asunto(s)
Procesamiento de Imagen Asistido por Computador , Imagenología Tridimensional , Humanos , Procesamiento de Imagen Asistido por Computador/métodos , Imagenología Tridimensional/métodos , Imagen por Resonancia Magnética/métodosRESUMEN
Se exaltan las cualidades humanas, la actitud profesional y la condición revolucionaria de la enfermera santiaguera Clara Elena Pérez Frómeta, quien se destacó como educadora y por su dedicación, solidaridad y humanismo dejó una huella imborrable en las nuevas generaciones de estudiantes(AU)
The human qualities, the professional attitude and the revolutionary condition of Santiago nurse Clara Elena Pérez Frómeta are highlighted, who stood out as educator and as a result of her dedication, solidarity and humanism she left an indelible print in the new generations of students(AU)