Blood Oxygen Level-dependent MRI Longitudinal Monitor of Changes in Blood Oxygen Levels in Remaining and Donated Kidney After Receiving Parental Kidney Transplantation
10.3969/j.issn.1005-5185.2018.03.013
- VernacularTitle:血氧水平依赖MRI纵向监测亲体肾移植术后保留肾与移植肾血氧水平改变
- Author:
Fan MAO
1
;
Tao REN
;
Lihua CHEN
;
Zhen WANG
;
Yingxin FU
;
Wen SHEN
Author Information
1. 天津医科大学一中心临床学院
- Keywords:
Kidney transplantation;
Magnetic resonance imaging;
Living donors;
Kidney;
Blood oxygen level
- From:
Chinese Journal of Medical Imaging
2018;26(3):213-217
- CountryChina
- Language:Chinese
-
Abstract:
Purpose To discuss the value of longitudinal assessment of the remaining kidney of the donor and kidney blood oxygen level changes after receiving kidney transplantation by applying blood oxygen level-dependent (BOLD) MRI. Materials and Methods Sixty patients underwent parental kidney transplantation from Jul. 2015 to Feb. 2017 in Tianjin First Center Hospital were prospectively collected, including 30 healthy kidney transplant donors and 30 recipients corresponding to them. The donors received renal BOLD examination 3 days before and 2 weeks after unilateral nephrectomy. Recipients received renal BOLD examination 2 weeks after kidney transplantation, of which, 15 pairs of patients underwent parental kidney transplantation received renal BOLD examination again six months after surgery. The apparent transverse relaxation rate (R2*) values of the cortex and medulla at different times before and after transplantation were measured and recorded. The differences of R2* values between 30 donors' cortex and medulla in both kidneys before surgery were compared; the differences of R2* values between 30 pairs of subjects' cortex and medulla in remaining and donated kidney within 2 weeks before and after surgery were compared; variance gained through single factor repeated measurement was applied to analyze and compared the difference of R2* values between 15 pairs of follow-up subjects' cortex and medulla in remaining and donated kidney at different time points before and after surgery. Results All 60 subjects received MRI scan, and there was no statistical difference in R2* values between 30 subjects' cortex and medulla in both kidney before surgery (P>0.05). The difference between the cortex and medulla was statistically significant, with R2* value of medulla higher than that of cortex (P<0.01). R2* values of cortex and medulla of the remaining kidney in 30 subjects two weeks after receiving unilateral nephrectomy were lower than those before surgery. R2* value of cortex and medulla of donated kidney were both lowered before surgery, the difference of which was statistically significant (P<0.01). R2*values of cortex and medulla in remaining and donated kidney of 15 pairs of subjects who have received half a year's follow up were both evidently reduced two weeks after surgery, and R2* values six months after surgery were raised compared with two weeks after surgery, but were still lower than that before surgery, the difference of which were both statistically significant (P<0.05). Conclusion BOLD MRI can be used for longitudinal monitor of changes in blood oxygen levels in remaining and donated kidney after receiving parental kidney transplantation.
