Abstract
Objective: The aim of study was to study the chemical composition of renal stone in Sudanese population using computed tomography scan.
 Method: This is analytic study conducted in Khartoum state hospitals in the period from November 2018 to October 2019.The problem of the study was no similar study done in Sudanese populations. The study was done in 100 patients. The data was collected from computed tomography scan to the kidneys, ureters and urinary bladder. Classified and analyzed by statistical package for the social sciences application (SPSS).
 Results: The study found that most chemical composition of renal stone among Sudanese population was uric acid (0%), Cystine (26%) then Struvite (14%) and calcium (60%). The most effective age group with renal stone was (61-70) years old (36.7%) and same age group have a Struvite stone (28.3%). Furthermore, the most common age group with a cyctine renal stone were the cystine affect in the age between 50 years to 60 years old.
 The uric acid, Cystine, and calcium stone composition may be reliably predicted in vivo on the basis of dual-energy Computed tomography findings. In the future, a single dual-energy computed tomography examination may contribute to not only the identification but also the chemical characterization of stones in the urinary tract and it may add to the information available from non-enhanced conventional CT performed for evaluation of nephrolithiasis.
Highlights
Urinary tract stones are common, with a lifetime incidence of up to 12% and recurrence rates of up to 50%
Despite the advantages of unenhanced computed tomography (CT), ultrasound is commonly used as a diagnostic tool in the management of urolithiasis
Type and Duration of Study A descriptive analytic cross-sectional study done in sudan
Summary
Urinary tract stones are common, with a lifetime incidence of up to 12% and recurrence rates of up to 50%. In diagnostic and treatment algorithms, stone burden is the most important factor to. Unenhanced helical computed tomography (CT) has replaced intravenous urogram and is regarded as the reference standard in the work-up of renal colic, owing to its high sensitivity and specificity. Apart from being the diagnostic standard, CT has the advantage of providing detailed anatomical information, can identify secondary signs. Of stone passage and is useful for ruling out alternate pathologies in cases of diagnostic uncertainty. Despite the advantages of unenhanced CT, ultrasound is commonly used as a diagnostic tool in the management of urolithiasis. US is recognized to be both less sensitive and specific than CT; it is commonly available, inexpensive to operate and poses no risk of radiation exposure
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