Establishment of Reference Values for Renal Length and Volume for Normal Adult Sudanese using MRI Disc Summation Method
Knowledge of kidney character is important for clinical assessments of renal diseases. The aims of this study were to establish a normal range of values for kidney length and volume in normal Sudanese adults with no known history of renal disease and to determine the usefulness of body mass index (BMI), Body surface area (BSA), Glomerular filtration rate (GFR), Total body water (TBW),Creatinine Clearance(Crcl), Serum Creatinine Level(Scr) for prediction of kidney characters. 98 consecutive patients (43 females; 55 males) who had undergone axial T1, T2 weighted abdominal MRI images, were obtained during the period from June 2012 to June 2013 for indications other than renal diseases. Excluded patients were those who had renal cysts, hydronephrosis, and congenital kidney diseases .Detailed demographic information of the sample wererecorded. The kidneys volume and length were measured using Disc Summation Method and the relations between the variables were studied. The study showed that the kidneys length measured for normal Sudanese subjects were 10.08±0.46, 10.67±0.47 and the volumes were 101.6±12.98, 104.0±12.99 for right and left kidneys respectively, and it differed from other population. There were significant differences between males and females measurements and the correlation was significant between kidneys length and volume with BMI, TBW and subjects height. New equations were established to measure the kidneys length and volume. Our study confirmed that there was significant relation between the CrCl, GFR, and serum creatinine level with BSA, BMI, TBW, weight, gender and age and revealed that the kidney volume predicted the renal function significantly at p=0.005, for SCr p-value=0.056, 0.007, CrCl pvalue= 0.054, 0.043 and GFR p value= 0.051, 0.59 for right and left kidneys volume. MRI measurements using disc summation method for renal volume and length were accurate and a reference values were established for adult Sudanese subjects and were well corre
