Application of time-spatial labeling inversion pulse in renal corticomedullary differentiation and time parameter optimization
10.13929/j.1003-3289.201611013
- VernacularTitle:时间—空间标记反转脉冲技术在肾脏皮髓质分离中的应用及时间参数优化
- Author:
Shuang ZHANG
;
Xiaoshan GUO
;
Ying LEI
;
Lailong LUO
;
Minfeng XU
;
Shaobin WANG
- Keywords:
Kidney cortex;
Kidney medulla;
Magnetic resonance imaging;
Time-spatial labeling inversion pulse;
Black blood inversion time
- From:
Chinese Journal of Medical Imaging Technology
2017;33(5):778-781
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the application value of time-spatial labeling inversion pulse (T-SLIP) in renal corticomedullary differentiaton and the best black blood inversion time (BBTI) value.Methods Totally 60 volunteers were included,who underwent abdominal MR scan with noncontrast-enhanced SSFP sequence combined with T-SLIP.All subjects were scanned with different BBTI (800,1 000,1 200,1 400,1 600,1 800 ms) using coronary T-SLIP SSFP sequence.The images quality was evaluated using a four-point scale method.The region of renal cortex and medulla was devised automatically based on the image training algorithm.The signal intensity ratio with the different BBTI was calculated through measuring the signal intensity of the renal cortex and medulla.And the best BBTI values were analyzed.Results When BBTI was 1 200 ms,the image score was the highest.The signal intensity ratio (SIR) had statistical difference among different BBTI groups (all P＜0.05),when BBTI was 1 200 ms,the SIR was the highest,and the contrast between the renal cortex and medulla was obvious.Conclusion T-SLIP technology can improve the visibility of renal corticomedullary without contrast agents.The optimal BBTI for the best corticomedullary differentiation is 1 200 ms.
