Keywords:
Obstruction / Occlusion, Imaging sequences, MR-Diffusion/Perfusion, MR, Kidney, Abdomen
Authors:
O. T. Kalayci1, M. Apaydin2, F. Sonmezgoz3, S. Calık4, M. Koruyucu1; 1İzmir/TR, 2IZMIR/TR, 3Malatya/TR, 4Elazıg/TR
DOI:
10.1594/ecr2013/C-1990
Results
The significant declines were observed in renal signals with an increasing in the value of b,
in the healthy and obstructed kidneys.
The color change was observed on ADC maps,
which were created from DW echo-planar images,
depending on increasing b value and decreasing ADC coefficients,
The coloration was observed much more in hydronephrotic kidneys than normal kidneys,
compatible with lower ADC values (Fig.
2).While some hydronephrotic kidneys were large size,
other part of them were in normal size.
The mean renal ADC values in patients of hydronephrosis with benign etiology were 3.12±0.61x10-3,
2.38±0.45x10-3,
1.93±0.33x10-3mm2/sn and patients of hydronephrosis with malign etiology were 3.28±0.44x10-3,
2.57±0.68x10-3,
1.83±0.17x10-3mm2/sn; whereas mean renal ADC values in healthy volunteers of control group were 3.55±0.29x10-3,
2.67±0.49x10-3,
2.09±0.19x10-3 mm2/sn for b100,
b600 and b1000 values,
respectively.
ADC measurements of renal parenchyma in all hydronephrotic kidneys with benign and malign etiology were found to be extremely low compared to normal kidneys (p<0.05) (Table 1).
There was statistically significant difference between ADC values of hydronephrotic kidneys with benign causes and normal kidneys.
Mean ADC values of hydronephrotic kidneys with benign etiology were statistically significant lower than mean ADC values of normal kidneys for each b100,
b600 and b1000 (p<0.05).
Mean ADC values of hydronephrotic kidneys with malignant causes were found lower than mean ADC values of normal kidneys,
for each b100,
b600 and b1000.
In the obstructed kidneys with benign etiology,
minimum and maximum values of ADC were ranging from (1.45 to 4.10) x 10-3.
In the obstructed kidneys with malign etiology,
minimum and maximum values of ADC were ranging from (1.49 to 4.02) x 10-3.
Obstructed kidneys with malign etiology had lower ADC values for b1000 compared to obstructed kidneys with benign etiology but these alterations were statistically insignificant.