Purpose
Diffusion weighted-magnetic resonance imaging (DW-MRI) is used to show Brownian motion of the spins in biologic tissues,
can be use to differentiate normal and abnormal structures of tissues.
The apparent diffusion coefficient (ADC),
as main quantitive parameter used to interpret DW-MRIs,
combines the effects of capillary perfusion and water diffusion in the extracellular extravascular space [1].
DW imaging has been extensively used in neuroradiology.
The applications of DWI in abdominal disease have lagged behind neurologic applications.
Because DW-MRI of abdominal organs is much more difficult...
Methods and Materials
Forty-one patients with hydronephrotic kidneys,
26 patients (20 male and 6 female; mean age,
58; age range,
24-90 years old) with benign etiology and 15 patient (10 male and 5 female; mean age,
62; age range 21-80 years old) with malign etiology and 26 healthy volunteers (8 male and 21 female; mean age 49; age range,
27–65 years old) who had no history of renal disease and had normal creatine level (0.7±0.12) were included in this study.
Seven of 26 patients with benign etiology and...
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...
Conclusion
Hydronephrosis is a common disease of urological clinical practice,
which is one of the major causes of renal insufficiency and renal failure.
Dilatation of the renal pelvis and calyceal system can occur even in the absence of urinary obstruction; therefore,
hydronephrosis and obstructive uropathy are not interchangeable or synonymous terms [5].
Obstructive uropathy is a structural or functional hindrance of normal urine flow and it can occur due to some benign and malign causes.
Common causes include bladder stones,
kidney stones,
benign prostatic hyperplasia,
bladder...
References
1.Cova M,
Squillaci E,
Stacul F,
Manenti G,
Gava S,
Simonetti G,
Pozzi-Mucelli R Diffusion-weighted MRI in the evaluation of renal lesions: preliminary results.Br J Radiol.
2004;77(922):851-7.
2.Squillaci E,
Manenti G,
Di Stefano F,
Miano R,
Strigari L,
Simonetti G Diffusion-weighted MR imaging in the evaluation of renal tumours.
J Exp Clin Cancer Res. 2004;23(1):39-45.
3.
Thoeny H,
Keyzer F,
Oyen R,
Peeters R.
Diffusion-weighted MR imaging of kidneys in healthy volunteers and patients with parenchymal diseases: initial experience.
Radiology.
2005; 235:911–7.
4. Sandrasegaran K,...
Personal Information
O.
T.
Kalayci,
M.
Apaydin,
F.
Sonmezgoz,
S.
Calık,
M.
Koruyucu.
Department of Radiology,
Ataturk Training and Research Hospital,
35160,
Izmir,
Turkiye.
mail to:
[email protected]
F.
Sonmezgoz; Department of Radiology,
School of Medicine,
Firat University,
Elazig,
Turkiye.
S.
Calık; Faculty of Science,
Department of Statistic,
Firat University,Elazig,
Turkiye.