Effect of intravenous Gd-DTPA on 3.0T MR spectroscopy prescan of different organs
- VernacularTitle:Gd-DTPA对不同器官质子3.0T MR波谱预扫描的影响
- Author:
Shaoheng TAN
;
Changhong LIANG
;
Junhui ZHENG
;
Li XU
;
Zhonglin ZHANG
- Publication Type:Journal Article
- Keywords:
Magnetic resonance spectroscopy;
Single voxel;
Gadolinium DTPA
- From:
Chinese Journal of Medical Imaging Technology
2010;26(3):571-573
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the effect of intravenous Gd-DTPA on 3.0T proton MR spectroscopy (MRS) water suppression and shimming. Methods Prospective study of proton MRS was performed with GE Signa Excite HD 3.0T system and eight-channel phased-array coils with PRESS sequence (head, liver and kidney, respectively). Routine auto prescan program was operated to record full width half maximum (FWHM) and water suppression (WS%). Routine scan was performed after injection of Gd-DTPA, then prescan program was reoperated to record FWHM and WS%. The data of FWHM and WS% in head, liver and kidney were compared between before and after injection of Gd-DTPA with the Wilcoxon matched pairs signed test. Results WS% of spectroscopy of head and liver after administration of Gd-DTPA decreased significantly (T_+=12, T_-=66, P=0.02; T_+=0, T_-=45, P=0.007). The effect of shimming of kidney after administration of Gd-DTPA was poor (T_+=0, T_-=435, P<0.001) and WS% of spectroscopy of kidney after administration of Gd-DTPA decreased significantly (T_+=0, T_-=435, P<0.001). Conclusion WS% of spectroscopy in head, liver and kidney can be impacted negatively by Gd-DTPA. Gd-DTPA has great influence on shimming of spectroscopy of kidney, but has little influence on shimming of spectroscopy of head and liver. It is better to acquire MRS data before administration of contrast medium in kidney.
