Role of Unenhanced Multi-Detector Computed Tomography in Detection of Urinary Calculi in Comparison With Ultrasonography
Skanda Ragi* and Pramod ShahDepartment of Radiology, Krishna Institute of Medical Sciences, Karad, Maharashtra-415117.
Corresponding Author E-mail: skandaprasad9999@gmail.com
Abstract: In the past few years, advancements in computed tomography (CT) technology have changed the trend of imaging techniques used in the evaluation of the urinary system. However, the accuracy is main concern for detecting urinary calculi. To compare unenhanced multi-detector computed tomography (MDCT) with ultrasonography (USG) for accurate diagnosis of urinary calculi. This cross-sectional study was conducted from June 2018 to May 2019 by involving 80 non-consecutive patients, who underwent unenhanced MDCT and USG for the diagnosis of urinary calculi. Diagnostic accuracy of MDCT and USG were measured by calculating sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV). SPSS software Ver. 21.0 was used to perform statistical analysis. In the present study male to female ratio was 3.2:1 and the mean age was 37.1±16.01 years and 41.2±14.16 years, respectively. Flank pain was the commonest complaint recorded in 81.25% of patients. In both modalities, renal calculi were detected in 90% of the patients and in majority of patients (21.25%), stones were found in vesicoureteric junction and in 16.25 % it was found upper junction of the ureter. Further, in most of the patient’s calculi were detected bilaterally (41.25%), while in 31.25% and 27.5% patients, calculi were detected in left and right ureter, respectively. The sensitivity and specificity of MDCT in diagnosing ureteric calculi was 100% and 57.14%, respectively. The sensitivity of USG was 8.33% with 100% specificity. Hence, MDCT showed more sensitivity than USG in diagnosing urinary calculi. MDCT helps in accurate diagnosis of urinary calculi compared to USG.
Keywords: Flank pain; Urinary Calculi; Ureteral Calculi; Tomography; Ultrasonography Back to TOC