DocumentCode :
3685676
Title :
A novel 3D Cartesian random sampling strategy for Compressive Sensing Magnetic Resonance Imaging
Author :
Giuseppe Valvano;Nicola Martini;Maria Filomena Santarelli;Dante Chiappino;Luigi Landini
Author_Institution :
Department of Information Engineering, University of Pisa, Italy
fYear :
2015
Firstpage :
7502
Lastpage :
7505
Abstract :
In this work we propose a novel acquisition strategy for accelerated 3D Compressive Sensing Magnetic Resonance Imaging (CS-MRI). This strategy is based on a 3D cartesian sampling with random switching of the frequency encoding direction with other K-space directions. Two 3D sampling strategies are presented. In the first strategy, the frequency encoding direction is randomly switched with one of the two phase encoding directions. In the second strategy, the frequency encoding direction is randomly chosen between all the directions of the K-Space. These strategies can lower the coherence of the acquisition, in order to produce reduced aliasing artifacts and to achieve a better image quality after Compressive Sensing (CS) reconstruction. Furthermore, the proposed strategies can reduce the typical smoothing of CS due to the limited sampling of high frequency locations. We demonstrated by means of simulations that the proposed acquisition strategies outperformed the standard Compressive Sensing acquisition. This results in a better quality of the reconstructed images and in a greater achievable acceleration.
Keywords :
"Magnetic resonance imaging","Encoding","Three-dimensional displays","Coherence","Acceleration","Image reconstruction","Standards"
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society (EMBC), 2015 37th Annual International Conference of the IEEE
ISSN :
1094-687X
Electronic_ISBN :
1558-4615
Type :
conf
DOI :
10.1109/EMBC.2015.7320127
Filename :
7320127
Link To Document :
بازگشت