Analysis of Image Quality of Diffusion Weighted Imaging in Liver Lesions
- VernacularTitle:肝占位病变扩散加权成像的图像质量评价
- Author:
Yupin LIU
;
Xiaoqing YANG
- Publication Type:Journal Article
- Keywords:
liver;
magnetic resonance imaging;
diffusion weighted imaging
- From:
Journal of Practical Radiology
2001;0(08):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the correlation between b value and image quality of diffusion weighted imaging(DWI).Methods DWI was performed in 20 healthy volunteers and 60 patients with liver lesions.Signal to noise ratio ( SNR ) and contrast to noise ratio ( CNR ) were calculated . Results The mean SNR was larger than 5 when b value was 100 s/mm2 or 300 s/mm2, while b value was 600 s/mm2 or 1100 s/mm2, SNR was less than 5. With b value increased, the influence of blood supply on ADC decreased, but the artifacts increased and CNR decreased, CNR of cystic lesions decrease more than that of solid lesions.Conclusion The gradient factor(b)between 300 s/mm2 and 600 s/mm2 is the most suitable in DWI.
