Coil filling factor and signal to noise ratio / 中华放射学杂志

ABSTRACT

Objective To analyze the effects of coil size and sample volume on coil signal to noise ratio(SNR).Methods Two sphere phantoms with different diameters were put into the center of body coil symmetrically,and the smaller phantom was put into the centers of body coil,head coil,and the extremity coil respectively.All the phantoms were then scanned with sequences which were used to detect the SNR using the same parameters,and then the SNRs were measured.Results In body eoil,the image SNR got from the smaller phantom increased by 4% than that got from the bigger phantom,the difference was statistical significant(P